Service Manual FILE No.

Ultra-Low Temperature Freezer

MDF-C8V

SANYO Electric Co., Ltd.

Biomedical Business Unit

RoHS
This product does not contain any hazardous substances prohibited by the RoHS Directive.
(You will find ‘RSF’ mark near the rating plate on the RoHS compliant product.)
WARNING
* You are requested to use RoHS compliant parts for maintenance or repair.
* You are requested to use lead-free solder.

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 Effective models

This service manual is effective following models.

Model name Product code Voltage and Frequency

MDF-C8V 823 187 51 115V 60Hz
823 187 52 220/230/240V 50Hz

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 Contents

Page
Features ----------------------------------------------------- 1
Specifications ----------------------------------------------------- 2
- Structural specifications
- Control specifications
- Performance specifications
Dimensions ----------------------------------------------------- 5
Refrigeration circuit diagram ------------------------------------ 6
Refrigeration circuit welding points ---------------------------- 7
Cooling unit parts ----------------------------------------------- 8
Components on PCB ----------------------------------------------- 9
Electrical parts -------------------------------------------------- 10
Specifications of sensor ------------------------------------------ 11
Wiring diagram ----------------------------------------------------- 12
Circuit diagram ----------------------------------------------------- 13
Connections on PCB ------------------------------------------------ 14
Control specifications --------------------------------------------- 15
Parts layout ----------------------------------------------------- 23
Test data ----------------------------------------------------------- 26
- Pull-down
- Pull-up
- Unit pressure
- Power consumption and current input
Collection and charge of refrigerant ---------------------------- 30
Instruction manual -------------------------------------------------- 32

Operational specification of condensing fan motor

- When ambient temperature is lower than 20㷄, condensing fan motor
activates with 30 min. of delay at least after the unit starts running.
- When ambient temperature is lower than 20㷄, condensing fan motor
does not always activate.

Procedures for trial operation

1. Turn all the switches (Power SW and Battery SW) off beforehand.
2. Connect the plug to outlet then turn Power SW on.
3. Turn Battery SW on.
(Note) If you turn Battery SW on prior to Power SW,
buzzer would be emitted until the unit reaches to SV.

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 Features

䂓㩷 Space saving freezer for personal use

- ‘Glass wool’ core is newly adopted for insulation
- Width 550mm for minimal installation

䂓㩷 Suitable internal dimensions for inventory racks

- 6 pcs of inventory rack (IR-207C) *
* 5pcs of inventory rack when Back-up kit (CVK-UB4) installed

䂓㩷 Ensure preservation
- Selectable high temperature alarm
- Setting temperature can be kept by remote alarm terminal and non-volatile memory

䂓㩷 Easy maintenance
- ‘Filter-less’ cooling circuit made clean up unnecessary

䂓㩷 Environmental friendly
- HFC mixed refrigerant (R245fa, R600, R23 and R14)
- HC foaming insulation

䂓㩷 Optional component
- Automatic temperature recorder: MTR-G85/MTR-85H
- Recorder mounting kit: MDF-S3085 for MTR-85H
- Recorder sensor cover: MTR-C8
- Back-up system: CVK-UB4
- Back-up mounting plate: MDF-UBK
- Inventory rack: IR-207C, IR-305C

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 Specifications

ŶStructural specifications
Item Specifications
External dimensions W 550 × D 685 × H 945 mm
Internal dimensions W 405 × D 490 × H 425 (mm)
Effective capacity 84 L
Exterior Painted steel
Interior Painted steel
Door Painted steel
Insulation Cabinet; Rigid polyurethane foamed-in place
and VIP(vacuum insulation panel)
Door; Rigid polyurethane foamed-in place
Door lock 1pc (also used as a latch)
Caster 4pc, 2 leveling foot
Access port 17mm, back side, bottom
Compressor Hermetic rotary type, 400W
Evaporator Tube on sheet type (also used as a inner cabinet)
Condenser Finless tube type
Refrigerant HFC mixed refrigerant (R245fa/R600/R23/R14)
Refrigerant oil Ze-NIUS32SA
Power supply Local voltage
Weight 64 kg
Accessory 1 set of key, 1 scraper
Optional component Automatic temperature recorder (MTR-85H, MTR-G85)
Mounting kit for MTR-85H (MDF-S3085)
Recorder sensor cover (MTR-C8)
Back-up system (CVK-UB4)
Back-up mounting plate (MDF-UBK)
Inventory rack (IR-207C, IR-305C)

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 ŶControl specifications
Item Specifications
Cooling performance -80 (1/2H temp, AT 30 , no load)
Temperature control range -60 ~-80 (AT5~30 , no load)
Temperature controller Microprocessor controlled system: Key-pad input
Temperature set range: -55 ~-85 (1 increment)
Set value kept in non-volatile memory
Temperature sensor Pt.1000
Temperature display LED digital display 1 increment
Temperature Selectable +5 ~+20 for high temp. alarm (Initial; +10 )
ALARM lamp blinks and intermittent buzzer beeps with
15min.of delay
Remote alarm contact: Normal Open, rating 30VDC, 2A
Temperature alarm turns on during power failure
(not linked with buzzer)
Filter None
Alarm
Power failure ALARM lamp blinks with intermittent buzzer beeps, remote
alarm outputs.
Remote alarm 3P remote alarm terminal: Maximum 30VDC, 2A
NC-COM NO-COM
Outputs during temperature alarm and power failure alarm.
Battery BATTERY lamp is lit.
Accumulating period: 2.8 years
Control panel Lamp: ALARM, BATTERY
BUZZER: Buzzer key
ALARM TEST: Alarm test key
SET: To switch SV and PV
: To shift the digit
ȁ: To change the digit
Key lock function With key is pressed for 5 seconds;
L0: Unlocked L1: Locked
Self diagnosis function When any failure occurs on the temperature sensor,
Error code and internal temp.(PV) are alternately displayed.
Remote alarm contact is ON and the buzzer beeps.
Power switch None
Compressor protection Overload relay, Comp. sensor

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 ŶPerformance specifications
Cooling performance -80 (ambient temperature; 30 ,no load)
Temperature control range -60 to -80 (ambient temperature; 30 ,no load)
Rated voltage AC110V AC115V AC220V AC230V AC240V AC220V
Rated frequency 60Hz 60Hz 50Hz 50Hz 50Hz 60Hz
Rated power consumption 295W 300W 310W 325W 350W 310W
Noise level 49 dB A (background noise; 20 dB)
Maximum pressure 3.7 MPa

Note) Specifications will be subject to change without notice.

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 Dimensions

㧨/&(%8㧪
405

490
25
R
727

685 33 550
58
425

852
945
887
35

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 Refrigeration circuit diagram

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 Refrigeration circuit welding points

㪚㪉㪋

䌃䌉 Place tofitfitAT
Place to ATsensor
sensor

㪚㪐㩷 㪚㪏㩷
㪚㪈㪈㩷 㪚㪈㪇㩷 㪚㪈㩷
㪚㪈㪊㩷 㪚㪈㪉㩷 䌆䌂
㪚㪉㩷
㪚㪈㪌㩷 㪚㪈㪋㩷
㪚㪊㩷
㪚㪈㪎㩷 㪚㪈㪍㩷
㪚㪋㩷
㪚㪈㪐㩷 㪚㪈㪏㩷 㪚㪌㩷 䌁䌉
㪚㪉㪈㩷 㪚㪉㪇㩷 㪚㪍㩷 䌐䋳
䌅䌘䌏 Ex. capillary
䌅䌘䌉 䌇䌉
㪚㪉㪊㩷 㪚㪉㪉㩷 㪚㪎㩷
䌐䋱 䌐䋲 䌔䋲
䌔䋱 䌔䋳
䌆䌁
Ex. tank
䌃䌁㩷 䌁䌏
䌔䌚㩷
䌇䌏
䌄䌄
䌔䌙㩷
䌄䌉㩷

䌄䌚㩷 䌄䌏

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 Cooling unit parts

<MDF-C8V>
Item Specifications
Compressor
115V, 60Hz Type: C-2SN400L2W Compressor code: 807 780 22
220/230/240V,50Hz Type: C-2SN400L5W Compressor code: 807 780 25
Refrigerant oil Ze-NIUS32SA Charged q’ty: 280cc
Cooling system Forced air cooling
Condenser
Type Finless tube Cascade condenser
Condenser 8 columns x 2 lines Coil pipe W200 mm x 8 columns
Pre-condenser 7 columns x 1 line P290 mm ʊ
Frame pipe 4.76 x T0.7 mm ʊ
Evaporator 7.94 x T0.7 mm
Type Tube on sheet (also used as interior)
Capillary tube 1.2
Resistance (PSI kg/cm2) 0.59 MpaG
Length (mm) 2000
Outer diameter (mm) 1.8
Refrigerant HFC mixed refrigerant: MU-N48(EU)/(DOT) Charged q’ty: 375+/-8 g
Dryer Dry core: D-SM032T Charged q’ty: 35g
Condensing fan 196 mm, 4 blades
Material: ABS
Condensing fan (115V, 60Hz) SE4-D041N1P Output: 4W
motor (220/230/240V, 50Hz) SE4-D041N5P Output: 4W

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 Components on PCB

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 Electrical Parts
MDF-C8V AC115V, 60Hz AC220/230/240V, 50Hz

Compressor Type C-2SN400L2W C-2SN400L5W

Compressor code 807 780 22 807 780 25
Rated voltage (50/60Hz) 㱢1, 110~115V, 60Hz ij1, 220~240V, 50/60Hz
Winding resistance C-S(Aux) 5.432㱅 18.79㱅
C-R(Main) 1.824㱅 6.251㱅
Starting relay Type AMVL-180A AMVL-300A
Pick up voltage 108~128VAC 215~247VAC
Drop out voltage 30~75VAC 69~132VAC
Parts code 626 100 1527 626 100 1503
Overload relay Type P22MUF P11EUF
Action to the temp. (No current) ON:69+/-10 OFF:130+/-8 ON:69+/-10 OFF:150+/-8
Action to the current (AT25 ) 22.5A 11.5A
Operation time 6~15 sec. 6~15 sec.
Non-Action to the temp. (80㷄䋩
Non-Action 5.15A 3.3A
Action 6.9A 4.2A
Parts code 626 100 6751 624 227 3554
Starting capacitor Rating 100ȝF, 160VAC 30㱘F, 300V
Parts code 626 120 2320 626 120 2085
Running capacitor Rating 20ȝF, 220VAC 4㱘F, 400V
Parts code 626 120 1477 626 120 1538
Condensing fan motor Type SE4-D041N1P SE4-D041N5P
Rating 115V, 4P 230V, 4P
Parts code 624 225 1712 624 227 3554
Temp. control relay Type G4F-11123T G4F-11123T
Contact capacity 20A, 12VDC 20A, 12VDC
Parts code 624 173 2397 624 173 2397
Fan relay Type G2R-1A-T G2R-1A-T
Contact capacity 12V, 10A, 250V 12V, 10A, 250V
Coil 12VDC 12VDC
Parts code 624 188 9299 624 188 9299
Switching power supply Type ZWS10-12/J ZWS10-12/J
Rated output 12VDC, 0.85A 12VDC, 0.85A
Parts code 624 209 9277 624 209 9277
Breaker switch Type BAM215131 BAM215131
Rating 250V, 15A 250V, 15A
Parts code 624 215 4235 624 215 4235
Temperature sensor Type THC-663 (PT sensor) THC-663 (PT sensor)
Rating 1000㱅 1000㱅
Parts code 624 225 3495 624 225 3495
Compressor sensor Type 502AT-1 502AT-1
Rating 5k㱅, 25㷄 5k㱅, 25㷄
Parts code 624 030 1129 624 030 1129
Battery switch Type SLE6A2-5 SLE6A2-5
Rating 4A, 250VAC 4A, 250VAC
Parts code 624 213 1472 624 213 1472
Battery Type 5HR-AAC 5HR-AAC
Rating 6V, 1100mAH 6V, 1100mAH
Parts code 624 209 9284 624 209 9284

<Compressor terminals layout>

C R

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 Specification of sensor

Following shows the relation between temperatures of temp. sensor (Pt1000ȍ) and
resistance value.

Temperature Resistance Temperature Resistance

( ) (ȍ) ( ) (ȍ)
-170 326.92 -30 885.13
-160 368.57 -20 923.55
-150 409.87 -10 961.84
-140 450.83 0 1000.0
-130 491.47 10 1038.0
-120 531.83 20 1076.0
-110 571.92 30 1113.8
-100 611.76 40 1151.4
-90 651.38 50 1189.0
-80 690.78 60 1226.4
-70 729.99 70 1263.8
-60 769.02 80 1301.0
-50 807.87 90 1338.0
-40 846.58 100 1375.0

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 Wiring diagram

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 Circuit diagram

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 Connection on PCB

Following is the explanation of connections on Main PCB.

Connector Connects to Usage Voltage

CN1 Switching power supply To supply the power to PCB #1:12V

CN2 MTR-480 Option To connect with interface

Remote alarm terminal
#1: COM.
CN3 Output for remote alarm contact
#2: N.O.
#3: N.C.
To control chamber temperature #1-#2:12V
#1-#2: Temp. control relay
CN4 To conduct current to cap. tube #5-#6:12V
#5-#6: Fan relay
heater
#1, #7: Buzzer
CN5 To control with each switches
#2-#6: Control PCB (CN51)

CN6 Display PCB CN52 To connect with each LED

To control condensing fan motor
CN7 #7-#8: Comp. sensor by the temperature in comp.
sensor
To supply the power to Main PCB #2:6V
CN8 #1-#2: Battery
during power failure

CN9 Unused

CN11 #1-#3: Temp. sensor To detect chamber temperature

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 㩷 Control specification
1. Key and Switch
BUZZER : In alarm condition, buzzer stops sounding with this key pressed.
Remote alarm output and alarm message would not be off.
During the power failure (battery back-up), press the key to show the
present temperature of PT sensor.

ALARM TEST : With this key pressed to activate alarm test mode to be forcibly step into
alarm condition (ALARM lamp blinks, intermittent buzzer beeps, digital LED
goes off and remote alarm inputs).
After approx. 90seconds then, normal condition retrieves with Auto Return
activates.
With the battery switch turns off, “E09” blinks on the display.

SET : Press this key once to activate set mode (2nd digit in LED blinks), press the
key again to store the value to be changed.
With Key Lock setting mode (“L 0” or “L 1” is displayed), press the key to
store the value to be changed.

During setting mode, the blinking digit shifts among the 1st digit or the 2nd
digit or 3rd digit.

During setting mode, count the blinking digit up. In PV display, press the
key over 5 seconds to enter the function mode. (“F00” is displayed)

2. Temperature control
Setting range : -55㷄~-85㷄
Display range : -180㷄~+50㷄
Setting procedure : Press SET key and set the required value with key and key.
Press SET key to store the set value.
Out of setting range : If you try to set the value which is out of temperature setting range, it is
unacceptable with buzzer beeps for 1second.

3. Temperature alarm
Setting range : High temperature alarm … +5㷄~+20㷄 (Initial setting: 10㷄)
Low temperature alarm …. -5㷄~-20㷄 (initial setting: -10㷄)
Setting procedure : Keep pressing key over 5 seconds to enter function mode (F00).
Input “F01” for high temperature alarm or “F02” for low temperature
alarm. Press SET key to set the value to be changed with the 1st digit
blinks. Press SET key again to store the value in the non-volatile
memory.
Out of setting range : If you try to set the value which is out of alarm setting range, it is
unacceptable with buzzer beeps for 1 second.

4. Key Lock mode and Function mode

A) Key Lock mode
Setting range : 0, 1
Setting procedure: In PV display, keep pressing key over 5 seconds to enter into Key
Lock mode. (“L_0” or “L_1” is displayed. initial: L_0) with “0” or “1” blinks.
Change the value with key and press SET key to store the value in
the non-volatile memory.

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 B) Function mode
Setting range : 00~33
Display range : 00~39
00, 04, 08, 13, 15, 16, 18, 19, 20, 26, 27, 31 and 33 are unavailable.
Setting procedure : In PV display, keep pressing key over 5 seconds to enter function
mode (F00 is displayed). Change the blinking 1st digit to desired function
code with key and key. Press SET key to be function code
available.
If you press SET key after input digits among 00, 04, 08, 13, 15, 16, 18,
19, 20, 31 and 33, the display automatically reverts to PV.
Out of setting range : If you try to input F34~F39, it is unacceptable to change with
automatically revert to PV display.

5. Warning function
High temp. alarm : When PV is higher than SV+SVH (high temp. alarm SV) +1, ALARM lamp
and LED display blinks, intermittent buzzer beeps with approx. 15
minutes of delay, and remote alarm output turns on.
When PV is lower than SV+ SVH, ALARM lamp and LED display go off,
buzzer stops beeping, and remote alarm output turns off.
If you press BUZZER key, the buzzer stops beeping instead remote
alarm output does not turn off.
Low temp. alarm : When PV is lower than SV-SVL (low temp. alarm SV) -1, ALARM lamp
and LED display blinks, intermittent buzzer beeps with approx. 15
minutes of delay, and remote alarm output turns on.
When PV is lower than SV- SVL, ALARM lamp and LED display go off,
buzzer stops beeping, and remote alarm output turns off.
If you press BUZZER key, the buzzer stops beeping instead remote
alarm output does not turn off.

6. Other function
Auto Return :
If there is not any key operation for 90 seconds in each setting mode,
Key Lock mode and Function mode, the display automatically reverts to
PV. Note) Auto Return is not worked in F09 and F10.
Sensor temperature : F12: Temperature in temp. sensor is displayed
(Ex. -80.2㷄㩷 㸢㩷 displayed as ‘80.2’)
F14: Temperature of comp. sensor is displayed.
(Ex. 67㷄㩷 㸢㩷 displayed as ‘067’)
Battery accumulating F03: Battery accumulating time is displayed.
time : (Ex. 2years and 6months consumed 㸢㩷 displayed as ‘02.5’)
The display shows ’02.8’ to inform the battery exhaustion.
Then replace with new battery.
<Reset of accumulating time>
Step into F06. Input ‘409’ and press SET key to turn the display
to ’00.0’ with BATTERY lamp goes off.
ROM version : F30: ROM version is displayed (Ex. Ver. 1.00 㸢㩷 displayed as “1.00”)
Condensing fan F32: Notice for condensing fan motor accumulating time
motor accumulating 000: Not notify 001: Notify
time : When you set in ‘001’ and fan motor accumulating time is
reached to 5.6 years, ‘FAn’ and PV are alternately displayed.
<Reset of accumulating time>
Step into F06. Input ‘410’ and press SET key to clear
non-volatile memory in ’00.0’. The display reverts to PV only.

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 7. Function mode
F00 Automatically revert to PV display
F01 SVH (high temp. alarm SV) setting
F02 SVL (low temp. alarm SV) setting
F03 Battery accumulating time display
F04 Automatically revert to PV display
F05 Compressor delay time setting
F06 Service code input (code: 384)
F07 * Temperature Zero Adjustment
F08 * Automatically revert to PV display
F09 * Factory test mode …… Unavailable
F10 * Factory test mode …… Unavailable
F11 * Factory test mode …… Unavailable
F12 * Display of temperature of temp. sensor
F13 * Automatically revert to PV display
F14 * Display of temperature of Comp. sensor
F15 * Automatically revert to PV display
F16 * Automatically revert to PV display
F17 * Model code setting (Initialization of non-volatile ROM and memory)
F18 * Automatically revert to PV display
F19 * Automatically revert to PV display
F20 * Automatically revert to PV display
F21 Communication ID set
F22 Communication mode set
F23 * Automatically revert to PV display
F24 Remote alarm terminal output
F25 Ring-back time set
F26 * “000” is displayed…Unavailable
F27 * “000” is displayed…Unavailable
F28 * Display of delay time of permission for measuring running rate (2 hrs timer)
F29 * Display of delay time of permission for measuring running rate (8 hrs timer)
F30 * ROM version is displayed
F31 * Automatically revert to PV display
F32 * Notice for condensing fan motor accumulating time
F33 * Automatically revert to PV display
F34~F39 Unused
Setting In PV display, keep pressing key over 5seconds to display “F00”.
procedure: Input the desired function code with key and key.
Press SET key to be function mode available.
* … You should input service code (384) in F06 beforehand.
To cancel service code, input “000” in F06 or turn the power off.

F00: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F00” displayed to revert to PV display.

F01: <Purpose> SVH (high temp. alarm SV) setting

<Operation> Input F01 and press SET key to display “010” (initial value).
Set the value in the range “005”~“020” with key. Press SET key
to store the value and revert to PV display.

F02: <Purpose> SVL (low temp. alarm SV) setting

<Operation> Input F02 and press SET key to display “-10” (initial value).
Set the value in the range “-05”~“-20” with key. Press SET key to
store the value and revert to PV display.

F03: <Purpose> Battery accumulating time is displayed

<Operation> Input F03 and press SET key to display alternately F03 with “00.0”
(in case battery used for a month or less). Press SET key to revert to
PV display.

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 F04: <Purpose> Simply passing through if entered by mistake.
<Operation> Press SET key in “F04” displayed to revert to PV display.

F05: <Purpose> Compressor is turned on with forcibly delayed (by minute increment)
when the power retrieves from the power failure.
<Operation> Input “F05” and press SET key to display “002” (initial).
Change the value in the range “002”~”015” with key and key.
Press SET key to store the value and revert to PV display.

F06: <Purpose> Dividing F-code for customer used from service

<Operation> Input F06 and press SET key to display “000” (initial value).
Set to “384” with key and key. Press SET key to store the
value and revert to PV display.
<Cancel> Input F06 and press SET key to display “384”.
Change to “000” with key and key. Press SET key to store
the value and revert to PV display.
Turn the power off then on to revert to “000”. (not stored in
non-volatile memory)
Note) “384” is stored in non-volatile memory during battery back-up.
(battery SW is ON)

F07: <Purpose> To match temperature of temp. sensor with temperature of center at

the chamber.
<Operation> Input service code in F06 prior to use this mode.
Input F07 and press SET key to display “00.0” (initial value).
Change to the desired value with key and key in the range of
“-4.9”~”04.9”.
Press SET key to store the value and revert to PV display.

F08: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F08” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F12: <Purpose> To display the temperature of temp. sensor

<Operation> Input service code in F06 prior to use this mode.
Input F12 and press SET key to display alternately F12 and “XX.X”
(present internal temperature). Press SET key to revert to PV
display. 3 digits indication. Minus “-“ is not indicated.
Ex) “-85.5㷄” 㸢㩷 indicated as “85.5”
“-79.5㷄” 㸢㩷 indicated as “-80”
F13: <Purpose> Simply passing through if entered by mistake.
<Operation> Press SET key in “F13” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F14: <Purpose> To display the temperature of Comp. sensor

<Operation> Input service code in F06 prior to use this mode.
Input F14 and press SET key to display alternately F14 and “XX.X”
(present temperature of Comp. sensor). Press SET key to revert to
PV display.

F15: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F15” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

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 F16: <Purpose> Simply passing through if entered by mistake.
<Operation> Press SET key in “F16” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F17: <Purpose> Non-volatile memory initialization, model code change

<Operation> Service code should be input in F06 prior to use this mode.
Input F17 and press SET key to display “001”. Change the value
with key and key. Press SET key to store and revert to PV
display.
Model code ‘003’: MDF-C8V

F18: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F18” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F19: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F19” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F20: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F20” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F21: <Purpose> Serial communication ID setting

<Operation> Input F21 and press SET key to display “000” (initial).
Change the value in the range “001”~”255” with key and key.

F22: <Purpose> Serial communication mode setting

<Operation> input F22 and press SET key to display “000” (initial value)
Change the value with key and key.
Press SET key to store the value and revert to PV display.
Control mode (the 3rd digit)
0: Local (initial)
1: Remote
Baud rate (the 2nd digit)
0: 2400bps (initial)
1: 4800bps
2: 9600bps
Note) You cannot be changed SV if control mode is set in “Remote”.

F23: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F23” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F24: <Purpose> To control remote alarm output

<Operation> Input F24 and Press SET key to display “000” (initial).
Change to the desired value with key and key.
Press SET key to store the value and revert to PV display.
000: Remote alarm is ON even if the buzzer stops beeping with BZ
key pressed.
001: Remote alarm is OFF when the buzzer stops beeping with BZ
key pressed.

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 F25: <Purpose> Alarm auto recovery time setting
<Operation> Input F25 and press SET key to display “030” (initial).
Change to the desired value with key and key.
Press SET key to store the value and revert to PV display.
000: Auto recovery OFF 040: Recovers after 40min. passed
010: Recovers after 10min. passed 050: Recovers after 50min. passed
020: Recovers after 20min. passed 060: Recovers after 60min. passed
030: Recovers after 30min. passed
(initial)

F28: <Purpose> To display delay time of permission of measuring running rate

(2hrs timer; 000~120 min)
<Operation> Service code should be input in F06 prior to use this mode.
Input F28 and press SET key to display F28 and ‘xxx’ (present count
value) alternately. Press SET key to revert to PV.

F29: <Purpose> To display delay time of permission of measuring running rate

(8hrs timer; 000~480 min)
<Operation> Service code should be input in F06 prior to use this mode.
Input F29 and press SET key to display F29 and ‘xxx’ (present count
value) alternately. Press SET key to revert to PV.

F30: <Purpose> ROM version is displayed

<Operation> Service code should be input in F06 prior to use this mode.
Input F30 and press SET key to display alternately F30 with “X.XX”
(present ROM version).
Press SET key to revert to PV display.

F31: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F31” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F32: <Purpose> To notify accumulation time of condensing fan motor

<Operation> Service code should be input in F06 prior to use this mode.
Input F32 and press SET key to display ‘000’ (Initial setting).
000: Not notify
001: Notify
Set your desired setting with key and key pressed.
Press SET key to store the value and revert to PV display.

F33: <Purpose> Simply passing through if entered by mistake.

<Operation> Press SET key in “F33” displayed to revert to PV display.
Buzzer tone is emitted if service code is not input in F06.

F34~F39 Unused
<Operation> Input F34~F39 and press SET key.

8. Differential (The point of compressor ON and OFF )

COMP ON: SV +0.4㷄
COMP OFF: SV -0.4㷄

9. Offset value
PV+1.0㷄 is the offset value to adjust the difference between temperature of temp. sensor
and the center of chamber.

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 10. Remote alarm terminal
In normal condition: Remote alarm contact: N.O. N.C.
㸣 㸣
In alarm condition & Remote alarm contact: N.C. N.O.
power failure :

11. Sensor failure

(1) Temp. sensor
Open circuit: E01 and 50㷄 are displayed alternately, the buzzer beeps intermittently
and remote alarm contact outputs.
The compressor would be allowed to turn on.
Press BUZZER key to stop the buzzer beeping.
Short circuit: E02 and -170㷄>PV>-180㷄 are displayed alternately, the buzzer beeps
intermittently and remote alarm contact outputs.
The compressor would be allowed to turn on.
Press BUZZER key to stop the buzzer beeping.

(2) Comp. sensor

Open circuited: E05 and PV are displayed alternately, the buzzer beeps intermittently
and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.
Short circuited: E06 and PV are displayed alternately, the buzzer beeps intermittently
and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.

(3) Compressor E10 is displayed and compressor turns off when temperature in Comp.
abnormal temp. sensor is higher than 100㷄. When temperature in Comp. sensor is lower
than 65㷄, compressor turns on.

(4) Error code priority

No.1: Temp. sensor failure (E01 or E02)
No.2: Comp. sensor failure (E05 or E06)
No.3: Compressor abnormal temperature (E10)

(5) Temperature to judge sensor failure

PT sensor: 49.9㷄 or higher (E01 displayed) … Judge as ‘Open circuited’
-170㷄 or lower (E02 displayed) … Judge as ‘Short circuited’
Comp. sensor: -60㷄 or lower (E05 displayed) … Judge as ‘Open circuited’
130㷄 or higher (E06 displayed) … Judge as ‘Short circuited’

12. When the power is supplied (without battery)

Compressor: In PV is higher than SV, compressor turns on with 2minutes (initial value)
of delay after the power was supplied.
Condensing With temperature in Comp. sensor is lower than 20㷄, Fan motor would
fan motor: not activate even if the power is supplied. Fan motor starts rotating once
the temperature in Comp. sensor is reached equal or higher than 80㷄.
Setting data: The setting data initialized in F17 is retrieved in non-volatile memory.

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 13. Fan motor operation and compressor protection
Fan motor operation : 1.When the temperature in Comp. sensor is lower than 20㷄;
Fan motor turns off with the power supplied 㸢 Turns on when the
temperature in Comp. sensor is higher than 80㷄 㸢 Turns off when
the temperature in Comp. sensor is lower than 20㷄 㸢 Turns on
when the temperature in Comp.sensor is higher than 80㷄
2. When the temperature in Comp. sensor is lower than 20㷄;
Fan motor turns on with the power supplied 㸢 Turns off when the
temperature in Comp. sensor is lower than 20㷄 㸢 Turns on when
the temperature in Comp. sensor is higher than 80㷄
Compressor protection: Compressor stops operation when the temperature in Comp. sensor
(during Fan Lock) reaches 100㷄. (Compressor protection)
Starts operation again when the temperature in Comp. sensor is lower
than 65㷄.

15. Other specifications

(1) Lamp specifications:
<Control PCB>
DP1: Orange lamp
Goes off: High/low temp. alarm, sensor failure, power failure
Lit : Not in alert condition
DP2: Green lamp
Goes off: Compressor does not activate. (normal condition)
Lit : Compressor activates.
DP4: Yellow lamp
Goes off: Fan motor does not activate. (normal condition)
Lit : Fan motor activates.
<Display PCB>
DP51: Red lamp
Goes off: Not in alarm condition (normal condition)
Blinks : High/low temp. alarm (without delay), or sensor failure,
or power failure

DP53: Orange lamp

Goes off: Battery accumulation time is less than 2.8yrs.
Lit : Battery accumulation time is over than 2.8yrs (Expired).
Blinks : In F11 performed

(3) Buzzer specifications:

High/low temp. alarm: Intermittent tone emitted with delay
Sensor failure: Intermittent tone emitted when any error code among
E01, E02, E05 and E06 is displayed
Power failure: Intermittent tone emitted
Key operation: A click emitted if available
Invalid input: Alarming tone emitted for 1 second

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 Parts layout

Temp. sensor PT-1000>

MDF-C8V

Comp.sensor
<Fan>

<Battery>

<Control panel>

Battery cover

<Back side of Control panel>

Display PCB

Control PCB

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 <How to access the Main PCB>

1. Catch the pick by screwdriver to pull the panel out.

2.Loosen tie band to set cables free. Pull Electric BOX out carefully.

Electric BOX

<Main PCB layout>

ROM Switching power supply

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 <Lower back side> <Remote alarm>

Battery switch

Ex.tank

Temp.control relay Fan relay Starting relay

Starting capacitor

Power cord

Running capacitor

Breaker switch

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 Test Data

Note: All data is the reference only.

㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩷㪺㪿㪸㫉㪸㪺㫋㪼㫉㫀㫊㫋㫀㪺㫊䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪈㪈㪌㪭䇭㪍㪇㪟㫑䇭㪘㪫㪊㪇㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪋㪇
㪈㪆㪉㪟䇭㪘㫀㫉
㪜㪭㪘㩷㪦㪬㪫
㪉㪇

㪇
㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㪲㷄㪴

㪄㪉㪇

㪄㪋㪇

㪄㪍㪇

㪄㪏㪇

㪄㪈㪇㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩷㪺㪿㪸㫉㪸㪺㫋㪼㫉㫀㫊㫋㫀㪺㫊䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪉㪊㪇㪭䇭㪌㪇㪟㫑䇭㪘㪫㪊㪇㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪋㪇
㪈㪆㪉㪟䇭㪘㫀㫉
㪜㪭㪘㩷㪦㪬㪫
㪉㪇

㪇
㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㪲㷄㪴

㪄㪉㪇

㪄㪋㪇

㪄㪍㪇

㪄㪏㪇

㪄㪈㪇㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

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 㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩷㪺㪿㪸㫉㪸㪺㫋㪼㫉㫀㫊㫋㫀㪺㫊䋨㫇㫌㫃㫃㪄㫌㫇㪀䇭㪘㪫㪊㪇㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪋㪇

㪈㪆㪉㪟䇭㪘㫀㫉
㪉㪇

㪇
㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㪲㷄㪴

㪄㪉㪇

㪄㪋㪇

㪄㪍㪇

㪄㪏㪇

㪄㪈㪇㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

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 㪬㫅㫀㫋䇭㪧㫉㪼㫊㫊㫌㫉㪼䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪈㪈㪌㪭䇭㪍㪇㪟㫑䇭㪘㪫㪊㪌㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪋
㪧䌤
㪊㪅㪌 㪧䌳

㪉㪅㪌
㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㪲㷄㪴

㪈㪅㪌

㪇㪅㪌

㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

㪬㫅㫀㫋䇭㪧㫉㪼㫊㫊㫌㫉㪼䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪉㪊㪇㪭䇭㪌㪇㪟㫑䇭㪘㪫㪊㪌㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪋
㪧䌤
㪊㪅㪌 㪧䌳

㪉㪅㪌
㪧㫉㪼㫊㫊㫌㫉㪼㪲㪤㪧㪸㪴

㪈㪅㪌

㪇㪅㪌

㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

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 㪧㫆㫎㪼㫉䇭㪚㫆㫅㫊㫌㫄㫇㫋㫀㫆㫅䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪈㪈㪌㪭䇭㪍㪇㪟㫑䇭㪘㪫㪊㪌㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪌㪇㪇 㪌

㪋㪌㪇 㪋㪅㪌

㪋㪇㪇 㪋
㪧㫆㫎㪼㫉䇭㪺㫆㫅㫊㫌㫄㫇㫌䌴㫀㫆㫅䇭㪲㪮㪴

㪊㪌㪇 㪊㪅㪌

㪊㪇㪇 㪊

㪚㫌㫉㫉㪼㫅㫋㪲㪘㪴
㪉㪌㪇 㪉㪅㪌

㪉㪇㪇 㪉

㪈㪌㪇 㪈㪅㪌

㪈㪇㪇 㪈

㪌㪇 㪮 㪘 㪇㪅㪌

㪇 㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

㪧㫆㫎㪼㫉䇭㪚㫆㫅㫊㫌㫄㫇㫋㫀㫆㫅䋨㫇㫌㫃㫃㪄㪻㫆㫎㫅㪀
㪉㪊㪇㪭䇭㪌㪇㪟㫑䇭㪘㪫㪊㪌㷄䇭㪥㫆䇭㫃㫆㪸㪻
㪌㪇㪇 㪌

㪋㪌㪇 㪋㪅㪌

㪋㪇㪇 㪋
㪧㫆㫎㪼㫉䇭㪺㫆㫅㫊㫌㫄㫇㫌䌴㫀㫆㫅䇭㪲㪮㪴

㪊㪌㪇 㪊㪅㪌

㪊㪇㪇 㪊
㪚㫌㫉㫉㪼㫅㫋㪲㪘㪴

㪉㪌㪇 㪉㪅㪌

㪉㪇㪇 㪉

㪈㪌㪇 㪈㪅㪌

㪈㪇㪇 㪈

㪌㪇 㪮 㪘 㪇㪅㪌

㪇 㪇
㪇 㪈 㪉 㪊 㪋 㪌 㪍 㪎 㪏 㪐 㪈㪇 㪈㪈 㪈㪉
㪫㫀㫄㪼㪲㪿㫆㫌㫉㪴

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 Collection and charge of refrigerant

1. Preparation a.

* Refrigerant [MU-N48]
* Connector for charging pipe (if necessary)

2. Procedures b.
1) Pull vacuum in refrigeration circuit
Pull vacuum by pump for approx. 5 minuites.

<NOTE>
It is important to pull vacuum in the circuit
to avoid possibility causing fire by residual
refrigerant (R-600).

2) Connect charging pipe. c.

Measure weight of tank before charge. (See picture c.)
Connect tank with both vacuum pump and gauge
manifold. (See picture d.)
It should be taken 3 hours at least to pull vacuum
with 2 tanks.

Pump capacity: 300L/min.

d.

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 3) Charge of refrigerant e.
Stop vacuum pump operation.
Open the valve of tank to charge refrigerant
with approx. 0.2~0.5 Mpa/G.

4) Pipe pinching in High pressure side f.

Charge refrigerant until pressure is
reached to 1.6MPa/G.
Close the valve of tank.
Hold charging pipe by pliers to pinch it off
by pinch pliers. (See picture f.)

Pinch pliers

5) Charge refrigerant in Low pressure side g.

Open the valve again to charge refrigerant
in Low pressure side.
Charge until you can ensure pressure should
be 0.1 Mpa/G with unit running.
Turn the tank upside down to charge
refrigerant without remains. (See picture-g.)

6) Pinching pipe h.
Measure the weight of tank after charged.
Form the pipe which was pinched off.

Apply welding to the points of

pipe which were pinched to prevent
being broken.

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 Instruction manual

xThis section is extracted and printed from Instruction Manual.

xIf you find out “Refer to page ƔƔ” in them, this page means not page in service manual
but page in the lower corner of each page in the extract from Instruction manual.

This page number is not corresponded with serial number in Service manual.

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 INSTRUCTION MANUAL
MDF-C8V

Ultra-Low Temperature Freezer

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 CONTENTS

INTRODUCTION P. 2
PRECAUTIONS FOR SAFE OPERATION P. 3
ENVIRONMENTAL CONDITIONS P. 7
FREEZER COMPONENTS P. 8
Control panel P. 10
INSTALLATION SITE P. 11
INSTALLATION P. 12
START-UP OF UNIT P. 13
CHAMBER TEMPERATURE SETTING P. 14
KEY LOCK FUNCTION P. 14
ALARM TEMPERATURE SETTING P. 15
SETTING OF ALARM RESUME TIME P. 17
CHANAGE OF COMPRESSOR DELAY TIME P. 18
REMOTE ALARM TERMINAL P. 19
ALARMS & SAFETY FUNCTIONS P. 20
ROUTINE MAINTENANCE
Cleaning of cabinet P. 21
Defrosting P. 21
Battery P. 22
REPLACEMENT OF BATTERY P. 23
TROUBLESHOOTING P. 24
DISPOSAL OF UNIT P. 25
Recycle of battery P. 25
TEMPERATURE RECORDER (OPTION) P. 30
Installation of MTR-85H P. 31
Installation of MTR-G85 P. 33
BACK-UP SYSTEM (OPTION) P. 35
SPECIFICATIONS P. 37
PERFORMANCE P. 38
SAFETY CHECK SHEET P. 39

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 INTRODUCTION
Ŷ Read this manual carefully before using the appliance and follow the instructions for safety operation.

Ŷ Sanyo never guarantee any safety if the appliance is used for any objects other than intended use or
used by any procedures other than those mentioned in this manual.

Ŷ Keep this manual in an adequate place to refer to it as necessary.

Ŷ The contents of the manual will be subjected to change without notice due to the improvement of
performance or functions.

Ŷ Contact Sanyo sales representative or agent if any page of the manual is lost or page order is incorrect.

Ŷ Contact Sanyo sales representative or agent if any point in this manual is unclear or if there are any
inaccuracies.

Ŷ No part of this manual may be reproduced in any form without the expressed written permission of
Sanyo.

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 PRECAUTIONS FOR SAFE OPERATION
It is imperative that the user complies with this manual as it contains
important safety advice.

Items and procedures are described so that you can use this unit correctly and safely.
If the precautions advised are followed, this will prevent possible injury to the user and
any other person.

Precautions are illustrated in the following way:

WARNING
Failure to observe WARNING signs could result in a hazard to personnel
possibly resulting in serious injury or death.

CAUTION
Failure to observe CAUTION signs could result in injury to personnel and
damage to the unit and associated property.

Symbol shows;

this symbol means caution.

this symbol means an action is prohibited.

this symbol means an instruction must be followed.

Be sure to keep this manual in a place accessible to users of this unit.

< Label on the unit >

This mark is labeled on the cover in which the electrical components of high voltage
are enclosed to prevent the electric shock.
The cover should be removed by a qualified engineer or a service personnel only.

WARNING
As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in the vicinity
of the equipment. It is important that you assess the work site to ensure there is suitable and
sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a
safe environment must be considered. These may include atmosphere monitoring and
warning devices.

36
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 PRECAUTIONS FOR SAFE OPERATION

WARNING
Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.

Only qualified engineers or service personnel should install the unit. The installation by
unqualified personnel may cause electric shock or fire.

Install the unit on a sturdy floor and take an adequate precaution to prevent the unit from
turning over. If the floor is not strong enough or the installation site is not adequate, this may result
in injury from the unit falling or tipping over.

Never install the unit in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.

Never install the unit in a flammable or volatile location. This may cause explosion or fire.

Never install the unit where acid or corrosive gases are present as current leakage or electric
shock may result due to corrosion.

Always ground (earth) the unit to prevent electric shock. If the power supply outlet is not
grounded, it will be necessary to install a ground by qualified engineers.

Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.

Connect the unit to a power source as indicated on the rating label attached to the unit. Use
of any other voltage or frequency other than that on the rating label may cause fire or electric shock.

Never store volatile or flammable substances in this unit if the container cannot be sealed. These
may cause explosion or fire.

Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet on the unit.
This may cause electric shock or injury by accidental contact with moving parts.

Use this unit in safe area when treating the poison, harmful or radiate articles. Improper use
may cause bad effect on your health or environment.

Turn off the power switch (if provided) and disconnect the power supply to the unit prior to any
repair or maintenance of the unit in order to prevent electric shock or injury.

Do not touch any electrical parts (such as power supply plug) or operate switches with a wet
hand. This may cause electric shock.

37
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 PRECAUTIONS FOR SAFE OPERATION

WARNING
Ensure you do not inhale or consume medication or aerosols from around the unit at the time of
maintenance. These may be harmful to your health.

Never splash water directly onto the unit as this may cause electric shock or short circuit.

Never put containers with liquid on the unit as this may cause electric shock or short circuit when
the liquid is spilled.

Never bind, process, or step on the power supply cord, or never damage or break the power
supply plug. A broken supply cord or plug may cause fire or electric shock.

Do not use the supply cord if its plug is loose. Such supply cord may cause fire or electric shock.

Never disassemble, repair, or modify the unit yourself. Any such work carried out by an
unauthorized person may result in fire, or electric shock or injury due to a malfunction.

Disconnect the power supply plug if there is something wrong with the unit. Continued
abnormal operation may cause electric shock or fire.

When removing the plug from the power supply outlet, grip the power supply plug, not the cord.
Pulling the cord may result in electric shock or fire by short circuit.

Disconnect the power supply plug before moving the unit. Take care not to damage the power
cord. A damaged cord may cause electric shock or fire.

Disconnect the power plug when the unit is not used for long periods. Keeping the connection
may cause electric shock, current leakage, or fire due to the deterioration of insulation.

If the unit is to be stored unused in an unsupervised area for an extended period, ensure that
children do not have access and that doors cannot be closed completely.

The disposal of the unit should be accomplished by appropriate personnel. Remove doors to
prevent accidents such as suffocation.

Do not put the packing plastic bag within reach of children as suffocation may result.

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 PRECAUTIONS FOR SAFE OPERATION

CAUTION
Use a dedicated power source (a dedicated circuit with a breaker) as indicated on the rating label
attached to the unit. A branched circuit may cause fire resulting from abnormal heating.

Connect the power supply plug to the power source firmly after removing the dust on the plug.
A dusty plug or improper insertion may cause a heat or ignition.

Never store corrosive substances such as acid or alkali in this unit if the container cannot be
sealed. These may cause corrosion of inner components or electric parts.

Check the setting when starting up of operation after power failure or turning off of power
switch. The stored items may be damaged due to the change of setting.

Be careful not to tip over the unit during movement to prevent damage or injury.

Prepare a safety check sheet when you request any repair or maintenance for the safety of service
personnel.

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 ENVIRONMENTAL CONDITIONS
This equipment is designed to be safe at least under the following conditions (based on the IEC 1010-1):

Ŷ Indoor use;

Ŷ Altitude up to 2000 m;

Ŷ Ambient temperature 5oC to 40oC

Ŷ Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50% relative humidity
at 40oC;

Ŷ Mains supply voltage fluctuations not to exceed 㫧10% of the nominal voltage;

Ŷ Other supply voltage fluctuations as stated by the manufacturer;

Ŷ Transient overvoltages according to Installation Categories (Overvoltage Categories) II; For mains
supply the minimum and normal category is II;

Ŷ Pollution degree 2 in accordance with IEC 664.

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 FREEZER COMPONENTS
1 2

10

13

7 8 9

12

11

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 FREEZER COMPONENTS
1. Lock: By turning to 180 degree to clockwise with a key, the door can be locked.

2. Door: Top hinged type. To open the door, grip the handle.

3. Magnetic door gasket: Seals the door and prevents leakage of cold air.

4. Inner lid: Serves as a means of reducing cold air leakage when the door is open. Remove the frost
regularly.

5. Access port: Located on the back side and bottom. These are used for leading the measuring
cable from the freezing chamber to the outside. The bottom port is also used for passing the
temperature sensor.

6. Caster: 4 casters are provided for easy movement.

7. Leveling foot: Serves to adjust the height and to settle the frame evenly.

8. Intake air vent: Be careful not to block this.

9. Control panel: The temperature setting keys etc. are located. See page 10 for details.

10. Space for temperature recorder: An automatic temperature recorder (optional part) can be
attached here. See page 30 “Temperature recorder (option)”.

11. Battery switch (back side): Switch for battery used for power failure alarm. Always keep ON.
Turn the switch OFF when the unit is in no use for a long period (more than 1 month).

12. Remote alarm terminal (back side): Used to notify an alarm condition of the unit to remote location.
See page 19 for details.

13. Fixture (back side): A fixture is attached to the rear of the frame. Fix the frame to the wall with
this fixture and rope or chain.

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 FREEZER COMPONENTS
Control panel
5 8 6

1 7 2 3 4

1. Alarm buzzer stop key (BUZZER): To silence the audible alarm, press this key. The alarm during
the alarm test cannot be silenced by pressing this key. See page 17 “Setting of alarm resume time” for
the details.

2. Set key (SET): Temperature setting mode is led by pressing this key and the changeable digit is
flashed. By pressing this key again, the setting is memorized. The set mode returns to the temperature
display mode automatically when 90 seconds has passed without any key operation. Refer to page 14
“Chamber temperature setting” for the details.

3. Digit shift key ( ): Pressing this key in the setting mode causes the changeable digit to shift.
Key lock is available by pressing this key for more than 5 seconds in the temperature display mode.
Refer to page 14 for the key lock.

4. Numerical value shift key ( ): Pressing this key in the setting mode causes the numerical value to
shift. ON-OFF of key lock can be selected by pressing this key in the key lock mode. Pressing this key
for more than 5 seconds in the temperature display mode causes the alarm temperature setting mode or
alarm resume time setting mode. See page 15 “Alarm temperature setting” or page 17 “Setting of alarm
resume time”.

5. Digital temperature indicator (TEMPERATURE): This indicator shows the present chamber
temperature or set temperature.

6. Alarm lamp (ALARM): This lamp is flashed during alarm condition.

7. Alarm test key (ALARM TEST): To check the alarm system during freezer operation. Pressing this
key with the battery switch ON gets the alarm lamp to flash, the remote alarm to operate, and the buzzer
to sound.

8. Battery check lamp (BATTERY): This lamp lights to recommend the battery replacement. For the
replacement, consult Sanyo sales representative or agent.

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 INSTALLATION SITE
To operate this unit properly and to obtain maximum performance, install the unit in a location with the
following conditions:

Ŷ A location not subjected to direct sunlight

Do not install the unit under direct sunlight. Installation in a location subjected to direct sunlight cannot
obtain the intended performance.

Ŷ A location with adequate ventilation

Leave at least 10 cm around the unit for ventilation. Poor ventilation will result in a reduction of the
performance and consequently the failure.

Ŷ A location away from heat generating sources

Avoid installing the unit near heat-emitting appliances such as a heater or a boiler etc. Heat can
decrease the intended performance of the unit.

Ŷ A location with little temperature change

Install the unit under stable ambient temperature. The allowable ambient temperature is between 5 and
30oC.

Ŷ A location with a sturdy and level floor

Always install the unit on a sturdy and level floor. The uneven floor or tilted installation may cause failure
or injury. Install the unit in stable condition to avoid the vibration or noise. Unstable condition may
cause vibration or noise.

WARNING
Install the unit on a sturdy floor. If the floor is not strong enough or the installation site is not
adequate, this may result in injury from the unit falling or tipping over.
Select a level and sturdy floor for installation. This precaution will prevent the unit from tipping.
Improper installation may result in water spillage or injury from the unit tipping over.

Ŷ A location not prone to high humidity

Install the unit in the ambient of 80% R.H. or less humidity. Installation under high humidity may cause
current leakage or electric shock.

WARNING
Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.
Never install the unit in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.

Ŷ A location without flammable or corrosive gas

Never install the unit in a flammable or volatile location. This may cause explosion or fire or may result
in the current leakage or electric shock by the corrosion of the electrical components.

Ŷ A location without the possibility of anything fall

Avoid installing the unit in the location where anything can fall down onto the unit. This may cause the
breakdown or failure of the unit.

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 INSTALLATION
1. Removing the packaging materials and tapes
Remove all transportation packaging materials and tapes. Open the doors and ventilate the unit. If the
outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted detergent
can damage the plastic components. For the dilution, refer to the instruction of the detergent.) After
the cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the panels with
a dry cloth.

2. Adjusting the leveling foot

Extend the leveling feet by rotating them counterclockwise
to contact them to the floor. Ensure the unit is level and
the casters are not in contact with the floor.

3. Fixing the unit

A fixture is attached to the rear of the frame. Fix the
frame to the wall with this fixture and rope or chain.

Leveling foot

4. Ground (earth)
The ground (earth) is for preventing the electric shock in the case of the electrical insulation is somehow
degraded. Always ground the unit at the time of installation.

WARNING
Use a power supply outlet with ground (earth) to prevent electric shock. If the power supply outlet is
not grounded, it is necessary to install a ground by qualified engineers.
Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.

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 START-UP OF UNIT
Follow the procedures for the initial and consequent operations of the unit.

1. Connect the power cord to the dedicated outlet having appropriate rating with the chamber empty.

2. Turn off the power switch of the back-up system (optional component) if it is installed.

3. Check that the battery switch is ON.

4. Set the chamber temperature to the desired temperature.

5. Allow the chamber temperature to fall to the desired temperature. Check the chamber temperature on
the temperature indicator.

6. Turn on the power switch of the back-up system (optional component) if it is installed.

7. Press the alarm test key (ALARM TEST) and check that the alarm lamp blinks and alarm buzzer
activates.

8. After confirming the above, you can put articles into the freezer chamber in a small batch to prevent the
temperature rise.

Operation after power failure

The settings (chamber temperature, alarm temperature) are memorized by nonvolatile memory during the
power failure. Accordingly, the freezer resumes the operation with setting before power failure.

The condensing fan does not operate for more than 30 minutes after start-up.
The condensing fan may not operate during normal operation when the ambient temperature is lower
o
than 20 C. This does not mean malfunction.

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 CHAMBER TEMPERATURE SETTING
Table 1 shows the basic procedure for setting the chamber temperature. Perform key operations in the
sequence indicated in the table. The example in the table is based on the assumption that the desired
temperature is -75oC.
Note: The chamber temperature is set to -80oC at the factory.

Table 1 Basic operation sequence (Example: Chamber temperature -75oC)

Description of operation Key operated Indication after operation
Connect the power cord to the ---- The current chamber temperature is
1
dedicated outlet. displayed.

2 Press SET key. SET The second digit is flashed.

When pressed, the figure of settable

Set to -75 with the numerical value digit changes.
3
shift key and digit shift key. When pressed, the settable digit
is shifted.
Set temperature is memorized and the
4 Press SET key. SET current chamber temperature is
displayed.
Note:
Ŷ The temperature set mode returns to the temperature display mode automatically when 90 seconds has
passed without any key operation.
Ŷ Although the value of the chamber temperature setting can range from -55oC to -85oC, the guaranteed
temperature range with no load is between -60oC and -80oC when the ambient temperature is 30oC.

KEY LOCK FUNCTION

This unit is provided with the key lock function. When the key lock is ON, change of temperature setting
through the key pad is not available. The key lock is set to OFF at the factory.

Display Mode Function

L 0 Key lock is OFF Enable to change of temperature setting
L 1 Key lock is ON Disable to change of temperature setting

Table 2. Procedure for key lock setting (change from key lock OFF to key lock ON)
Description of operation Key operated Indication after operation
---- The current chamber temperature is
1
displayed.

2 Press digit shift key for 5 seconds. The first digit is flashed.

Press numerical value shift key When pressed, the figure of settable
3
and scroll the figure to 1. digit changes.
The key lock is set to ON.
4 Press SET key. SET The current chamber temperature is
displayed.

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 ALARM TEMPERATURE SETTING
This unit is provided with the high and low temperature alarm and the temperature at which the alarm is
activated is changeable.
The following procedure shows the setting of alarm temperature according to the condition below:
High temperature alarm: activates at the temperature 5oC higher than the chamber set temperature
Low temperature alarm: activates at the temperature 5oC lower than the chamber set temperature
Note:
The alarm temperature is set at the factory 10oC higher and lower than the chamber set temperature.
The available range of high/low temperature alarm is between 5oC and 20oC higher/lower than the
chamber set temperature.

Table 3 Procedure for setting high temperature alarm

Description of operation Key operated Indication after operation
---- The current chamber temperature is
1 -----
displayed.
Press numerical value shift key for
2 The first digit is flashed.
5 seconds.
Press numerical value shift key and When pressed, the figure of settable
3
scroll the figure to 1. digit increases.
The right digit is flashed.
4 Press set key. SET

Set the temperature to 005 with the Pressing the key shifts the digit which can be set.
5 digit shift key and numerical value
When pressed, the figure of settable
shift key.
digit increases.
Alarm temperature is memorized and
6 Press set key. SET the current chamber temperature is
displayed.

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 ALARM TEMPERATURE SETTING
Table 4 Procedure for setting low temperature alarm
Description of operation Key operated Indication after operation
---- The current chamber temperature is
1 -----
displayed.
Press numerical value shift key for
2 The right digit is flashed.
5 seconds.
Press numerical value shift key and When pressed, the figure of settable
3
scroll the figure to 2. digit increases.
The right digit is flashed.
4 Press set key. SET

Set the temperature to -05 with the Pressing the key shifts the digit which can be set.
5 digit key and numerical value shift
When pressed, the figure of settable
key.
digit increases.
Alarm temperature is memorized and
6 Press set key. SET the current chamber temperature is
displayed.

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 SETTING OF ALARM RESUME TIME
The alarm buzzer is silenced by pressing alarm buzzer stop key (BUZZER) key on the control panel
during alarm condition (The remote alarm is not silenced). The buzzer will be activated again after
certain suspension if the alarm condition is continued. The suspension time can be set by following the
procedure shown in the Table 5 below.
The example in the table is based on the assumption that the desired duration is 20 minutes.
Note: The duration is set in 30 minutes at the factory.

Table 5 Setting procedure for alarm resuming time (change from 30 minutes to 20 minutes)
Description of operation Key operated Indication after operation
---- The current chamber temperature is
1 -----
displayed.
Press numerical value shift key for
2 The first digit is flashed.
5 seconds.

Set the figure to F25 with the Pressing the key shifts the digit which can be set.
3 digit shift key and numerical value
When pressed, the figure of settable
shift key.
digit increases.
The current setting is displayed.
4 Press set key. SET
The middle digit is flashed.
Set the figure to 020 with the When pressed, the figure of settable
5
numerical value shift key. digit increases.
Alarm resume time is memorized and
6 Press set key. SET the current chamber temperature is
displayed.

Ŷ The settable alarm resume time is 10, 20, 30, 40, 50, or 60 minutes (The setting is 010, 020, 030, 040,
050, or 060). The buzzer would not reset if the reset time is set in 000.
Ŷ It is recommended to set the alarm resume time when the freezer is not under alarm condition. The
new setting is effective on the next alarm condition.
Ŷ The setting cannot be changed during power failure.
Ŷ The remote alarm during power failure or buzzer and remote alarm during alarm test cannot be
silenced.
Ŷ The setting mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing the set key (SET) is not memorized.

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 CHANGE OF COMPRESSOR DELAY TIME
The delay time of the compressor can be changed to reduce the load on the power line and to facilitate
the start-up (reset) of the freezer after power failure.

The example in the table is based on the assumption that the delay time is changed to 4 minutes.
The delay time is set in 2 minutes at the factory.

Note:
Ŷ The setting range for delay time is between 2 and 15 minutes. The cool down of chamber temperature
may be slow when the setting of delay time is over 5 minutes, depending on the installation environment.
There is no need of changing the delay time when the capacity of power source is adequate.

Table 6. Changing procedure for delay time (change from 2 minutes to 4 minutes)
Description of operation Key operated Indication after operation
The current chamber temperature is
1 ----
displayed.
Press numerical value shift key for
2 The first digit is flashed.
5 seconds.
Set the figure to F05 with the When pressed, the figure of settable
3
numerical value shift key. digit changes.
The current delay time is displayed.
4 Press set key. SET
The first digit is flashed.
Set the figure to 004 with the When pressed, the figure of the first
5
numerical value shift key. digit changes.
The delay time is memorized and
6 Press set key. SET the current chamber temperature is
displayed.
Ŷ The compressor starts to run with the delay time when the power cord is connected to the outlet or after
power failure.

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 REMOTE ALARM TERMINAL
WARNING
Always disconnect the power supply cord before connecting an alarm device to the remote alarm
terminal.

The terminal of the remote alarm is installed at the back of the unit. The alarm is generated from this
terminal. The contact capacity is DC 30 V, 2 A.
Contact output:
Between COM and N.O. Between COM and N.C.
At normal condition “Open” “Close”
At abnormal condition “Close” “Open”

Note:
The alarm device is activated when the power cord is disconnected because such condition is determined
as power failure.

REMOTE
ALARM

MAX DC30 V 2 A

N.C.

COM

N.O.

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 ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in Table 7, and also self diagnostic functions.

Table 7 Alarms and safety functions

Alarm & Safety Situation Indication Buzzer Safety operation
If the chamber temperature is higher Alarm lamp is flashed. Intermittent tone
High temperature Remote alarm with
than the temperature at which the Temperature indicator is with 15 minutes
alarm 15 minutes delay.
high temperature alarm is activated. flashed. delay.
If the chamber temperature is lower Alarm lamp is flashed. Intermittent tone
Low temperature Remote alarm with
than the temperature at which the Temperature indicator is with 15 minutes
alarm 15 minutes delay.
low temperature alarm is activated. flashed. delay.
In the case of power failure.
Power failure
When the power cord is Alarm lamp is flashed. Intermittent tone Remote alarm.
alarm
disconnected.
When approx. 2.8 years has passed
Battery check with the power cord connected to Battery check lamp lights. ----- -----
the outlet.
Alarm lamp is flashed.
If the thermal sensor is
E01 and chamber temp.
disconnected..
are displayed alternately.
Intermittent tone Remote alarm.
Alarm lamp is flashed.
If the thermal sensor is
E02 and chamber temp.
short-circuited
Sensor are displayed alternately.
abnormality Alarm lamp is flashed.
If the thermal sensor of the
E05 and chamber temp.
compressor is disconnected.
are displayed alternately.
Intermittent tone Remote alarm.
Alarm lamp is flashed.
If the thermal sensor of the
E06 and chamber temp.
compressor is short-circuited
are displayed alternately.
Battery switch When battery switch is OFF at Alarm lamp is flashed.
----- -----
check the time of alarm test. E09 is flashed.
Remote alarm.
Alarm lamp is flashed.
Condenser temp. In the event of failure of fan motor Compressor of
E10 and chamber temp. Intermittent tone
abnormality for cooling the compressor. high stage side
are displayed alternately.
stops.
Note:
Ŷ After power failure, the operation is resumed with the condition before power failure.
Ŷ The chamber temperature is displayed for 5 seconds if the alarm buzzer stop key (BUZZER) is
depressed during the power failure alarm. After that, the alarm buzzer stops. The alarm lamp
(ALARM) keeps blinking.
Ŷ In the case of sensor abnormality (E01 or E02 is displayed), the freezer continues to run.

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 ROUTINE MAINTENANCE
WARNING
Always disconnect the power supply to the unit prior to any repair or maintenance of the unit in
order to prevent electric shock or injury.
Ensure you do not inhale or consume medication or aerosols from around the unit at the time of
maintenance. These may be harmful to your health.

Cleaning of cabinet
Ŷ Clean the unit once a month. Regular cleaning keeps the unit looking new.
Ŷ Use a dry cloth to wipe off small amounts of dirt on the outside and inside of the unit and all accessories.
If the outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted
detergent can damage the plastic components. For the dilution, refer to the instruction of the detergent.)
After the cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the
cabinet or accessories with a dry cloth.
Ŷ Never pour water onto or into the unit. Doing so can damage the electric insulation and cause failure.
Ŷ The compressor and other mechanical parts are completely sealed. This unit requires absolutely no
lubrication.
Ŷ Remove the frost on the inner lid once a month.
Ŷ Press the back-up test switch once a month to check the back-up system operation when the back-up
system is installed.

Defrosting
The frost is built on the inside wall of the chamber and inner lid. The excessive frost possibly makes
some gap between the cabinet and door gasket, which may cause poor cooling. Remove the frost with a
scraper enclosed with the unit. Following shows the procedure for removing the heavy frost.
Note: For removing the frost, do not use a tool with sharp edge such as a knife or a screw driver.

1. Move all the contents in the chamber to another low temperature freezer or a tank refrigerated with
liquid N2 or CO2 gas (or dry ice).

2. Turn off the remote alarm switch and back-up switch (when installed).

3. Disconnect the power cord from the dedicated outlet.

4. Open the freezer door and remove the inner lid. Keep the freezer as it is until the frost is removed
completely.

5. Wipe out the water that has left in the chamber.

6. Start-up the freezer by following the procedure on page 13 “Start-up the unit”.

7. Once the chamber temperature has dropped to the desired temperature, place the original contents
back in the freezer chamber.

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 ROUTINE MAINTENANCE
Battery
The battery for power failure alarm is an article for consumption. The battery life is approximately 3
years. The buzzer can not be activated at the power failure and the stored items may be influenced if
the battery is left as it is for more than 3 years. It is recommended that the battery is replaced ahead of
time.
For the replacement of the battery, contact Sanyo sales representative or agent.

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 REPLACEMENT OF BATTERY
Location of a nickel-metal-hydride battery
This unit is provided a nickel-metal-hydride battery for the power failure warning device. The battery is
located at the back of the control panel. (Fig. 1)

The high voltage components are enclosed in the electrical box. The cover should be removed
by a qualified engineer or a service personnel only to prevent the electric shock..

Removal of nickel-metal-hydride battery

1. Turn off the power switch and disconnect the power supply plug.
2. As shown in the Fig. 2, remove 1 screws fixing the side cover with a screw driver and remove the side
cover.
3. Disconnect the battery connector. (Fig. 3)
4. Remove 4 screws fixing the battery cover. (Fig. 4)
5. Take out the battery.
6. Follow the procedure for recycling or proper disposal.

Handling of battery
Cover the battery terminal with an insulating tape to avoid the short circuit. Then follow the procedure for
recycling or proper disposal.

Side cover

Battery
Fig. 1 Fig. 2

Battery connector
Battery cover

Fig. 3 Fig. 4

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 TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.

Malfunction Check/Remedy
The freezer does not run Ŷ The power cord is not connected to the proper outlet.
Ŷ The power source does not have enough capacity.
Ŷ The power failure is occurred.
Ŷ The circuit breaker of power source is active.
Ŷ The fuse is blown.
Note:
Move the freezer contents to another freezer if the chamber temperature
raise due to the freezer failure.
The alarm device is active <at the start-up>
Ŷ The chamber temperature deviates from the set temperature.
<during use>
Ŷ The set temperature was changed.
Ŷ The door was kept opened for long period.
Ŷ The high temperature load was stored in the chamber.
In above cases, the alarm is stopped automatically after certain time.
The cooling is poor Ŷ You put too many articles of high temperature in the chamber.
Ŷ Too much frost is in the chamber.
Ŷ The door is opened/closed frequently.
Ŷ The set temperature is not appropriate.
Ŷ The freezer is in the direct sunlight.
Ŷ The freezer is not installed properly.
There is condensation Ŷ The condensation can be found outside the freezer depending on the
outside the freezer installation site, or under muggy environment. The condensation is
caused by the humidity not by freezer failure.
Wipe off the condensation with a dry cloth.
Noise Ŷ The freezer is not installed on the sturdy floor.
Ŷ The freezer is not leveled with the leveling feet.
Ŷ There is anything touching the frame.
Ŷ The freezer is in the status immediately after start up.
The unit sometimes causes a noise when the chamber temperature is
high due to the large load. The noise gets less and less accompanying
with the cooling of the chamber.
Note:
If the malfunction is not eliminated after checking the above items, or the malfunction is not shown in the
above table, contact Sanyo sales representative or agent.

CAUTION
The noise of refrigerant flow may be heard due to the characteristic of refrigerating circuit. Especially for
several hours after start-up, the noise of motor compressor or refrigerant flow can be larger. But such
noise does not mean malfunction nor failure.

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 DISPOSAL OF UNIT
WARNING
If the unit is to be stored unused in an unsupervised area for an extended period ensure that children
do not have access and doors cannot be closed completely.
The disposal of the unit should be accomplished by appropriate personnel. Always remove
doors to prevent accidents such as suffocation.

Recycle of battery
The unit contains a rechargeable battery. The battery is recyclable. At the end
of it’s useful life, check with you local solid officials option or proper disposal.

ᑜ㔚ᳰ㩷 䋪Label indication is obliged to comply with Taiwanese battery regulation.

⺧࿁ᡴ㩷

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 DISPOSAL OF UNIT

Note:
This symbol mark and recycle system are applied only to EU countries
and not applied to the countries in the other area of the world.

Waste Electrical and Electronic Equipment (WEEE) Directive-2002/96/EC

(English)
Your SANYO product is designed and manufactured with high quality materials and components which
can be recycled and reused.

This symbol means that electrical and electronic equipment, at their end-of-life, should be disposed of
separately from your household waste.

Please dispose of this equipment at your local community waste collection/recycling centre.

In the European Union there are separate collection systems for used electrical and electronic products.

Please help us to conserve the environment we live in!

(German)
Ihr SANYO Produkt wurde entworfen und hergestellt mit qualitativ hochwertigen Materialien und
Komponenten, die recycelt und wiederverwendet werden können.

Dieses Symbol bedeutet, daß elektrische und elektronische Geräte am Ende ihrer Nutzungsdauer von
Hausmüll getrennt entsorgt werden sollen.

Bitte entsorgen Sie dieses Gerät bei Ihrer örtlichen kommunalen Sammelstelle oder im Recycling Centre.

In der Europäischen Union gibt es unterschiedliche Sammelsysteme für Elektrik- und Elektronikgeräte.

Helfen Sie uns bitte, die Umwelt zu erhalten, in der wir leben!

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 DISPOSAL OF UNIT

(French)
Votre produit Sanyo est conçu et fabriqué avec des matèriels et des composants de qualité supérieure qui
peuvent être recyclés et réutilisés.

Ce symbole signifie que les équipements électriques et électroniques en fin de vie doivent être éliminés
séparément des ordures ménagères.

Nous vous prions donc de confier cet équipement à votre centre local de collecte/recyclage.
Dans l’Union Européenne, il existe des systèmes sélectifs de collecte pour les produits électriques et
électroniques usagés.

Aidez-nous à conserver l’environnement dans lequel nous vivons !

Les machines ou appareils électriques et électroniques contiennent fréquemment des matières qui, si elles
sont traitées ou éliminées de manière inappropriée, peuvent s’avérer potentiellement dangereuses pour la
santé humaine et pour l’environnement.
Cependant, ces matières sont nécessaires au bon fonctionnement de votre appareil ou de votre machine.
Pour cette raison, il vous est demandé de ne pas vous débarrasser de votre appareil ou machine usagé
avec vos ordures ménagères.

(Spanish)
Los productos SANYO están diseñados y fabricados con materiales y componentes de alta calidad, que
pueden ser reciclados y reutilizados.

Este símbolo significa que el equipo eléctrico y electrónico, al final de su ciclo de vida, no se debe
desechar con el resto de residuos domésticos.

Por favor, deposite su viejo “televisor” en el punto de recogida de residuos o contacte con su
administración local.

En la Unión Europea existen sistemas de recogida específicos para residuos de aparatos eléctricos y
electrónicos.

Por favor, ayúdenos a conservar el medio ambiente!

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 DISPOSAL OF UNIT

(Portuguese)
O seu produto SANYO foi concebido e produzido com materiais e componentes de alta qualidade que
podem ser reciclados e reutilizados.

Este símbolo significa que o equipamento eléctrico e electrónico no final da sua vida útil deverá ser
descartado separadamente do seu lixo doméstico.

Por favor, entregue este equipamento no seu ponto local de recolha/reciclagem.

Na União Europeia existem sistemas de recolha separados para produtos eléctricos e electrónicos
usados.

Por favor, ajude-nos a conservar o ambiente em que vivemos!

(Italian)
Il vostro prodotto SANYO è stato costruito da materiali e componenti di alta qualità, che sono riutilizzabili o
riciclabili.

Prodotti elettrici ed elettronici portando questo simbolo alla fine dell’uso devono essere smaltiti
separatamente dai rifiuti casalinghi.

Vi preghiamo di smaltire questo apparecchio al deposito comunale.

Nell’Unione Europea esistono sistemi di raccolta differenziata per prodotti elettrici ed elettronici.

Aiutateci a conservare l’ambiente in cui viviamo!

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 DISPOSAL OF UNIT

(Dutch)
Sanyo producten zijn ontwikkeld en gefabriceerd uit eerste kwaliteit materialen, de onderdelen kunnen
worden gerecycled en weer worden gebruikt.

Het symbool betekent dat de elektrische en elektronische onderdelen wanneer deze vernietigd gaan
worden , dit separaat gebeurt van het normale huisafval.

Zorg ervoor dat het verwijderen van de apparatuur bij de lokaal erkende instanties gaat gebeuren.
In de Europese Unie wordt de gebruikte elektrische en elektronische apparatuur bij de daarvoor wettelijke
instanties aangeboden.

Alstublieft help allen mee om het milieu te beschermen.

(Swedish)
Din SANYO produkt är designad och tillverkad av material och komponenter med hög kvalitet som kan
återvinnas och återanvändas.

Denna symbol betyder att elektriska och elektroniska produkter, efter slutanvändande, skall sorteras och
lämnas separat från Ditt hushållsavfall.

Vänligen, lämna denna produkt hos Din lokala mottagningstation för avfall/återvinningsstation.

Inom den Europeiska Unionen finns det separata återvinningssystem för begagnade elektriska och
elektroniska produkter.

Vänligen, hjälp oss att bevara miljön vi lever i!

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 TEMPERATURE RECORDER (OPTION)
WARNING
Always disconnect the power supply to the unit prior to attachment of a temperature recorder in
order to prevent electric shock or injury.

An automatic temperature recorders is available for the freezer as the optional component. The type of
the recorder is MTR-85H or MTR-G85. For the attachment, optional component is necessary as follows.

Temperature recorder Mounting kit Recorder sensor cover

MTR-85H MDF-S3085 MTR-C8
MTR-G85 ----- MTR-C8

For the installation of the temperature recorder, contact Sanyo sales representative or agency.

Space for temperature recorder

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 TEMPERATURE RECORDER (OPTION)
Installation of MTR-85H
1. Remove 4 screws (A, B, C, D) on the side of the
front panel to take off the front panel. Then remove 4
screws on the cover for the recorder mounting space Front panel
and take off the cover (Fig. 1). After removing the A
cover, replace 4 screws. C

Cover
B

Fig. 1

2. As shown in Fig. 2, install the recorder to the front

panel by using the fixture enclosed with the recorder
and the mounting plate (MDF-S3085). Mounting plate

3. Lead the recorder sensor to the chamber through Recorder

the access port at the bottom of the chamber.
Note:
The port is covered with a thermal insulation and
rubber cap. Remove those covers before passing Fixture
the recorder sensor.

Fig. 2

4. Fix the recorder sensor to the inside of the sensor

cover (MTR-C8) by using the enclosed clips and
screws and seal the access port on the chamber side
with a silicon. (Fig. 3)

Silicon
Recorder sensor

Sensor cover
Fig. 3

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 TEMPERATURE RECORDER (OPTION)
6. Attach the sensor cover to the right side of the
chamber with 2 screws on the chamber wall (Fig. 4)

Fig. 4

7. Seal the access port on the outside with putty as

shown in Fig. 5.
Putty
8. Replace the front panel and fix it with 4 screws.

9. Operate the freezer until the chamber temperature

gets to the set temperature. Check the recorded
temperature and chamber temperature displayed on
the control panel. Adjust the zero adjustment volume
on the temperature recorder so that the recorded
temperature can corresponds with the displayed
temperature if they are not compliance each other. Fig. 5
Refer to the instruction manual enclosed with the
recorder.

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 TEMPERATURE RECORDER (OPTION)
Installation of MTR-G85
1. Remove 4 screws (A, B, C, D) on the side of the
front panel to take off the front panel. Then remove 4
screws on the cover for the recorder mounting space Front panel
and take off the cover (Fig. 1).
A
C
2. Fix the temperature recorder to the front panel with
fixture and screws enclosed with the recorder. D
Note
Before fixing the temperature recorder, connect the
recorder connector with the connector on the right
Cover
back side of the control panel (Fig. 2) B

Fig. 1
3. Lead the recorder sensor to the chamber through
the access port at the bottom of the chamber.
Note:
Connector Recorder
The port is covered with a thermal insulation and
rubber cap. Remove those covers before passing
the recorder sensor.

4. Fix the recorder sensor to the inside of the sensor

cover (MTR-C8) by using the enclosed clips and
screws and seal the access port on the chamber side
with a silicon. (Fig. 3)

Fig. 2

Silicon
Recorder sensor

Sensor cover
Fig. 3

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 TEMPERATURE RECORDER (OPTION)
6. Attach the sensor cover to the right side of the
chamber with 2 screws on the chamber wall (Fig. 4)

7. Seal the access port on the outside with putty as

shown in Fig. 5.

9. Replace the front panel and fix it with 4 screws.

10. Operate the freezer until the chamber temperature

gets to the set temperature. Check the recorded
temperature and chamber temperature displayed on
Fig. 4
the control panel. Adjust the zero adjustment volume
on the temperature recorder so that the recorded
temperature can corresponds with the displayed
temperature if they are not compliance each other. Putty
Refer to the instruction manual enclosed with the
recorder.

Fig. 5

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 BACK-UP SYSTEM (OPTION)
This freezer can be provided with a back-up system (CVK-UB4) which is available as an optional
component. For the installation, refer to the instruction manual enclosed with the system.

BACK UP
STANDBY
2 4

5
3

BATTERY

CVK-UB4 control panel CVK-UB4 switch box

1. Power switch (BACKUP)

When turning on the system, the back-up standby lamp (green) is brightened. This means that the
system is ready. To stop the operation of the system, turn off this switch.

2. Test switch (TEST)

This switch is for checking the operation of back-up system. Pressing this switch is resulted in the
release of liquid carbon dioxide gas without system operation.

3. Temperature setting knob (TEMP. SET)

With this knob, set the temperature at which the system is operated. The effective set temperature
range is between -50oC and -70oC.

4. Back-up standby lamp (BACK UP STANDBY)

A lamp that is activated in conjunction with the ON/OFF of the power switch of the back-up system.

5. Battery lamp (BATTERY)

This lamp is brightened in orange when the battery capacity is less.

WARNING
As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in the vicinity
of the equipment. It is important that you assess the work site to endure there is suitable and
sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a
safe environment must be considered. These may include atmosphere monitoring and warning
devices.

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 BACK-UP SYSTEM (OPTION)
With the back-up system (CVK-UB4), the freezer prevents the chamber temperature from going up by
injecting the liquid CO2 gas when the power supply is disconnected (power failure, disconnection of power
cord, breaker OFF) or in the case of failure of freezer itself. The liquid CO2 gas is injected with the
activation of solenoid valve energized by battery when the chamber temperature reaches the alarm
temperature.
Following shows the procedure for setting the back-up system.

1. Setting of liquid CO2 gas cylinder

By using the joint and pipe enclosed with the
back-up system, connect the liquid CO2 gas Rough scheme (back side)
Liquid CO2
cylinder to the joint of the back-up system. For
gas cylinder
this setting, consult with a qualified gas supplier or
Sanyo sales agency.

2. After setting the liquid CO2 gas cylinder, operate

the freezer until the chamber temperature reaches
the required level.

3. Set the temperature of back-up operation at the

temperature higher than -70oC. The back-up
system is operated continuously if the temperature
of back-up operation is set at the temperature
lower than -70oC. This means the liquid CO2 gas
is consumed very quickly.

4. Switch on the back-up system.

5. Make sure that liquid CO2 gas spouts into the freezer chamber by pressing the back-up test switch.

Note:
Ŷ The liquid CO2 gas cylinder loses its cooling capacity at speed when the ambient temperature is over
31oC. Install the liquid CO2 gas cylinder in the cool environment. And the duration of back-up time per
one liquid CO2 gas cylinder varies depending on the ambient temperature. Refer to “Installation of
back-up system” enclosed with the back-up system for the available back-up time.
Ŷ The liquid CO2 gas cylinder should be a siphon type.
Ŷ Use the pipe encloses with the back-up system for the setting. (The extension of the pipe is not
permitted because of cooling capacity.)

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 SPECIFICATIONS
Name Ultra-Low Temperature Freezer
Model MDF-C8V
External dimensions W550 x D685 (+83)* x H945 (mm)
Internal dimensions W405 x D490 x H425 (mm)
Effective capacity 84 L
Exterior Painted steel
Interior Painted steel
Door Painted steel
Access port Diameter 17 mm, back side, bottom
Cabinet; Rigid polyurethane foamed-in place and VIP(vacuum insulation panel)
Insulation
Door; Rigid polyurethane foamed-in place
Compressor Hermetic rotary type, 400 W
Evaporator Tube on sheet type (also used as a inner cabinet)
Condenser Finless tube type
Refrigerant HFC mixed refrigerant
Temperature controller Microcomputer control system
Temperature display Digital display (setting range; between -55oC and -85oC)
Temperature sensor Platinum resistance (Pt 1000 )
Temperature alarm High temp. alarm, Low temp. alarm, Remote alarm, Battery check
Remote alarm contact Allowable contact capacity: DC 30 V, 2 A
Battery Nickel-metal-hydride battery, DC 6 V, 1100 mAh, Automatic charge
Weight 64 kg
Accessories 1 set of key, 1 scraper
Automatic temperature recorder (MTR-85H, MTR-G85)
Mounting kit for automatic temperature recorder MTR-85H (MDF-S3085)
Optional component Recorder sensor cover (MTR-C8)
Back-up system (CVK-UB4), Back-up mounting plate (MDF-UBK)
Inventory rack (IR-207C, IR-305C)
Note
Design or specifications will be subject to change without notice.
* The value in the parenthesis means the dimension of projected area.
The battery for power failure alarm is an article for consumption. It is recommended that the battery will
be replaced about every 3 years.

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 PERFORMANCE
Cooling performance -80oC (ambient temperature; 30oC, no load)
Temperature control range -60 C to -80oC (ambient temperature; 30oC, no load)
o

Rated voltage AC 110 V AC 115 V AC 220 V AC 230V AC 240V AC 220V

Rated frequency 60 Hz 60 Hz 50 Hz 50 Hz 50 Hz 60 Hz
Rated power consumption 295 W 300 W 310 W 325 W 350 W 310 W
Noise level 49 dB [A] (background noise; 20 dB)
Maximum pressure 3.7 MPa
Note The unit with CE mark complies with EC directives 89/336/EEC, 93/68/EEC and 73/23/EEC.

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 CAUTION
Please fill in this form before servicing.
Hand over this form to the service engineer to keep for his and your safety.

Safety check sheet

1. Freezer contents : Yes No

Risk of infection: Yes No
Risk of toxicity: Yes No
Risk from radioactive sources: Yes No

(List all potentially hazardous materials that have been stored in this unit.)
Notes :

2. Contamination of the unit:

Unit interior: Yes No
No contamination: Yes No
Decontaminated: Yes No
Contaminated: Yes No
Others:

3. Instructions for safe repair/maintenance of the unit

a) The unit is safe to work on Yes No
b) There is some danger (see below) Yes No
Procedure to be adhered to in order to reduce safety risk indicated in b) below.

Date :
Signature :
Address, Division :
Telephone :

Product name: Model: Serial number: Date of installation:

Ultra-low temperature MDF-C8V
freezer

Please decontaminate the unit yourself before calling the service engineer.

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 INSTRUCTION MANUAL
CVK-UB4
CVK-UB4(I)
Back-up System for
Ultra-Low Temperature Freezer

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 CONTENTS

INTRODUCTION P. 2

PRECAUTIONS FOR SAFE OPERATION P. 3

COMPONENTS LIST P. 5

INSTALLATION

Assembling of the solenoid valve P. 8

Installation of the door switch P. 9

installation of the back-up kit P.10

Wiring P.12

CONTROL PANEL P.13

TRIAL OPERATION P.14

Calibration P.14

SPECIFICATIONS P.15

PERFORMANCE P.15

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 INTRODUCTION
Ŷ Read this manual carefully before using the appliance and follow the instructions for safety operation.

Ŷ Sanyo never guarantee any safety if the appliance is used for any objects other than intended use or
used by any procedures other than those mentioned in this manual.

Ŷ Keep this manual in an adequate place to refer to it as necessary.

Ŷ The contents of the manual will be subjected to change without notice due to the improvement of
performance or functions.

Ŷ Contact Sanyo sales representative or agent if any page of the manual is lost or page order is incorrect.

Ŷ Contact Sanyo sales representative or agent if any point in this manual is unclear or if there are any
inaccuracies.

Ŷ No part of this manual may be reproduced in any form without the expressed written permission of
Sanyo.

Ŷ The mounting plate (MDF-UBK) of the option goods is necessary for the installation of the back-up
system.

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 PRECAUTIONS FOR SAFE OPERATION
It is imperative that the user complies with this manual as it contains
important safety advice.

Items and procedures are described so that you can use this unit correctly and safely.
If the precautions advised are followed, this will prevent possible injury to the user and
any other person.

Precautions are illustrated in the following way:

WARNING
Failure to observe WARNING signs could result in a hazard to personnel
possibly resulting in serious injury or death.

CAUTION
Failure to observe CAUTION signs could result in injury to personnel and
damage to the unit and associated property.

Symbol shows;

this symbol means caution.

this symbol means an action is prohibited.

this symbol means an instruction must be followed.

Be sure to keep this manual in a place accessible to users of this unit.

< Label on the unit >

This mark is labeled on the cover in which the electrical components of high voltage
are enclosed to prevent the electric shock.
The cover should be removed by a qualified engineer or a service personnel only.

WARNING
As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in the vicinity
of the equipment. It is important that you assess the work site to ensure there is suitable and
sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a safe
environment must be considered. These may include atmosphere monitoring and warning
devices.

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 PRECAUTIONS FOR SAFE OPERATION

WARNING
Only qualified engineers or service personnel should install this system. The installation by
unqualified personnel may cause electric shock or fire.

Turn off the all switches and disconnect the power supply to the ultra low temperature freezer
prior to the attachment of the back-up system in order to prevent electric shock or injury.

Never disassemble, repair, or modify the unit yourself. Any such work carried out by an
unauthorized person may result in fire or injury due to a malfunction.

There is a terminal (AC 100V) of the high voltage in the back-up system. Attach the back-up
unit cover before starting the trial operation. The operation without the cover may cause electric
shock.

CO2 gas is released when the back-up system is operated. Use this kit in well-ventilated
environment as high CO2 density level may cause a deficiency of oxygen.

CAUTION
This manual includes the attachment procedure for CVK-UB4 and CVK-UB4(I) only. For its
operation and the operation of a ultra-low temperature freezer, see an instruction manual provided
with the freezer.

Put on the dry gloves to protect the hands at the time of attachment. No gloves may cause cut
of the finger by the edge or corner.

Connect a pipe from a liquid CO2 gas cylinder to this unit correctly. Incorrect connection may
cause gas leakage.

Check the gas piping before trial operation to avoid gas leakage.

Stop the operation immediately and review the attachment procedure carefully if there is
something wrong with the back-up system during the trial operation.

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 COMPONENTS LIST
Confirm that the accessories of the table 1 are gathered. Report it to the dealer or the sales if there is a
problem in packing of the product.
Table 1
No. PARTS NAME Q’ TY APPEARANCE THE EXPLANATION OF THE USE

1 PLATE MTG A 1 The plate fixes a solenoid valve cover.

LCO2 SOLENOID It is the solenoid valve of LCO2. (This is

2 1
VALVE ASS’Y assembled by the setup.)

LCO2 SOLENOID It is a part of the LCO2 solenoid valve

2-1 1
VALVE assy.

VALVE OUTLET It is a part of the LCO2 solenoid valve

2-2 1
PIPE assy.

A CO2 valve is put in the chamber, and it

2-3 SK BAND 2
is the part which fixes insulation.

LCO2 JOINT PIPE

The pipe which connects a LCO2 gas
3 AND JOINT 1
cylinder and the LCO2 solenoid valve.
PACKING

BACK-UP LCO2 is injected when a freezer has

4 1
SYSTEM temperature rise.

SOLENOID VALVE This cover is a protection of the LCO2

5 1
COVER solenoid valve.

BACK-UP SYSTEM This cover is a protection of the back-up

6 1
COVER system.

VALVE PLATE
7 1 This plate fixes a valve cover.
MTG

This cover protects a valve outlet pipe in

8 VALVE COVER 1
the chamber.

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 COMPONENTS LIST
The continuation of the table 1
No. PARTS NAME Q’ TY APPEARANCE THE EXPLANATION OF THE USE

9 LABEL 1 It is put near the connection place.

DOOR SWITCH This assy connected a door switch and

10 1
ASS’Y two indicator lamps (green and orange).

It is the lamp turned on with a power

INDICATOR
10-1 - switch of the back-up system. 䋨 It is
LAMP (GREEN)
attached.䋩
It is the lamp turned on when the battery
INDICATOR
10-2 - of the backup system declines. 䋨 It is
LAMP (ORANGE)
attached.䋩
When the door of the freezer opens and
10-3 DOOR SWITCH - closes, it is the switch which does on-off.
䋨It is attached.䋩
WIRING ASS’Y These wires are the indicator lamp and
10-4 1 Refer to the Fig. of Page12.
DS the door switch. 䋨It is attached.䋩

DOOR SWITCH It is a plate which fixes a door switch

11 1
MTG PLATE ass’y.

SHIM (for DOOR

It is a plate to lay under the door switch
12 SWITCH MTG 1
mounting plate.
PLATE)
It is fixed on the door of the freezer, and it
13 STRIKE PLATE 1 is the part that on-off does a door switch
by the open/close of the door..
This cover fixes the wiring ass’y DS of the
14 WIRE COVER 2
door switch ass’y.

For nylon clip 6N䋨1䋩䇮For Nylon clip 7N

SCREW A M4䌸10
15 11 䋨2䋩䇮For back-up system䋨2䋩䇮For solenoid
(C TIGHT)
valve䋨4䋩䇮For mounting plate䋨2䋩

SCREW B M4䌸10
For solenoid cover䋨4䋩䇮For door switch ass’y
16 (STAINLESS)(CO 7
䋨3䋩
LORED HEAD)

SCREW C M4䌸10
17 2 For valve cover
(STAINLESS)

SCREW D M5䌸10
18 2 For strike plate
(STAINLESS)

SCREW E M5䌸16
19 2 For door switch mounting plate
(PAN HEAD)

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 COMPONENTS LIST
The continuation of the table 1
No. PARTS NAME Q’ TY APPEARANCE THE EXPLANATION OF THE USE
WIRING ASS’Y It is harness to install on the electric box of
20 1
BP the freezer (option).

21 NYLON CLIP 6N 1 Wiring ass’y DS is fixed.

22 NYLON CLIP 7N 2 Wiring ass’y BP is fixed.

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 INSTALLATION
Assembling of the solenoid valve
1. The joint nut on the outlet side of the CO2 solenoid valve is removed. The valve outlet pipe with the
pipe insulation is inserted into the joint nut, and fastened in the joint. (Fig. 1) Fasten a joint part securely
so that CO2 gas can not leak out. (Fig. 2).

2. Insulation is fixed with a SK band. (Two places) (Fig. 3).

Valve outlet pipe

㶎
Pipe insulation LCO2 solenoid valve

Outlet side

Fig. 1
㶎

Joint nut
Joint
Insulation

Valve outlet pipe

Fig. 2

Mounting plate B

SK band
Fig. 3

CAUTION
Check the gas piping before trial operation to avoid gas leakage. The nut marked with
in Fig. 1 is not fixed surely. Tighten it completely by assembling, and enforce a leak
test.

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 INSTALLATION
Installation of the door switch
1.㩷 Spacer and a door switch mounting plate are fixed on the hole of the left side (upside) of the freezer
with two screws E (M5 x 16 pan head). (Fig. 1)

Screw D
Shim for door switch
Door switch

Door switch cover

Shim for door switch

mounting plate
Door switch plate
㪪㪺㫉㪼㫎㩷㪜㩷 mounting Fig. 1
Screw B

2. It confirms that an indicator lamp, the door switch and those wirings are being done, and the door
switch ass’y is fixed on the door switch mounting plate with three screws B (M4 x 10 stainless steel
(coating head)).(Fig. 2)

Fig. 2

3. Strike plate is installed with two screws D (M5 x 10 stainless steel). (Fig. 3)
At this time, adjust it to the position where door switch is pushed under the condition that door closes.

Fig. 3

4. Wire cover is put on the rear side of freezer and the protection, and the wiring ass’y DS which it out of
the door switch ass’y is pasted on the left side of freezer. (Fig. 4)

Wire cover㩷 Fig. 4

5. The connector of the harness is connected to the connector on the top of the back-up system kit. (See
Page 12)

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 INSTALLATION
Installation of the back-up kit
1.㩷 The slit (bottom right rear side) which freezer is being fitted up with, a rear cover, a sensor cover, the
rubber cap of the access port and insulation inside the access port are taken out.

2. Wiring ass’y BP is passed through the nylon clip 7N, and fixed on
the back of MDF-UBK (option) with two screws A (M4 x 10 C It is
tight.). At this time, a wiring ass’y BP point is shown from the lower
Nylon clip
corner access port of MDF-UBK 150 mm. (Fig. 1) (It is wired for 7N
the harness in the next step 3)

Fig. 1

3. The cover which sticks to the connector (4P) in the rear of

electrical box is removed and connected to the connector that it has
wiring ass’y BP prepared on the product side, It is fixed with lead
wire band on the side of the (Fig. 2) electrical box. The rear cover of Fig. 2
freezer is fixed after the management of the wiring ass’y BP is
finished. (Fig. 3)

Fig. 3

4. At this time, four screws in the rear of the freezer are loosened.
(with the second from the top, the 4th (left and right)) And MDF-UBK
is fixed with a screw.䋨Fig. 4䋩

Fig. 4

5. An back-up system and an back-up system cover are removed,

Fook
and hook of the top (Fig. 5) on the back of the back-up system is
installed on MDF-UBK, and a bottom part is fixed with two screws A
(M4 x 10 C It is tight.). Then, it gains a removed back-up system
cover in the back-up system in the former street. (Fig. 6)
Fig. 5

Fig. 6

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 INSTALLATION
6. The sensor cover inside freezer chamber is removed, and the thermostat sensor part of the back-up
system is inserted into the hole under freezer temperature style sensor. The hole of the neighborhood of
the thermostat sensor part which inserted (A hole does not open an access port. Therefore, make a
hole in the plus driver.) into freezer inside and the rear side is stopped with silicon. Then, a thermostat
sensor is fixed on the sensor mounting plate by using the clip prepared in the sensor mounting plate in
advance. After that, gain a sensor cover inside in the former street. (Fig. 7)

It is blocked with screw

the silicone. Sensor cover
䋨screw hole is
Thermostat sensor upside䋩
(A pipe is made a U
form.)
Fig. 7

7. There is a access port which inserts the CO2 valve outlet pipe of the
CO2 solenoid into the lower corner hole of MDF-UBK. The CO2 valve
outlet pipe is inserted in that, and a LCO2 solenoid valve is fixed on
MDF-UBK with one screw A (M4 x 10 C It is tight.). (Fig. 8) The
mounting plate A is fixed with two screws A (M4 x 10 C is tight.). The Fig. 8
surroundings of the CO2 valve outlet pipe which inserted into freezer
are blocked with silicon. (Fig. 9) The valve cover mounting plate is
fixed by using the screw which sticks in the freezer in advance. It gains
a valve cover after a CO2 valve outlet pipe is bent in the bottom. (Fig.
10)
Fig. 9
chamber
side Silicon

Valve outlet pipe

䋨Copper pipe䋩

Fig.10

8. The wiring ass’y DS which it goes to out of the door switch ass’y
is passed through the nylon clip 6N, and MDF-UBK is stopped with
one screw A (M4 x 10 C It is tight.). (Fig. 11)

Fig. 11

9. When all harness management is finished, a solenoid valve

cover is fixed with four screws B (M4 x 10 stainless steel (coating
head)) four places. (Fig. 12) (see page 12.)

Fig. 12

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 INSTALLATION
Wiring

1. Harness (a white connector) from the solenoid valve is connected to the connector of the upper same
color of the back-up system.

2. It passes through the wiring ass’y DS (one white connector and two red connectors) from the door
switch ass’y from the outside of the solenoid, and each upper of the back-up system ass’y is connected
with the connector of the same color.

3. Wiring ass’y BP (white connector) from the freezer itself is connected with the connector of the upper
same color of the back-up system ass’y.

WARNING
There is a terminal (AC 100V) of the high voltage in the back-up system. Attach the back-up unit
cover before starting the trial operation. The operation without the cover may cause electric shock.
Connect the connection of the connector until you have clicking sound.

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 CONTROL PANEL

1
BACK UP
STANDBY
2 4

3 5

BATTERY

Control panel for CVK-UB4 Door switch ass’y for CVK-UB4

1. Power switch of back-up system (BACKUP)

When turning on the system, the back-up stand-by on the door switch ass’y is brightened. This means
that the system is ready. When this switch is turned off, the operation of the back-up system stops,
and a back-up stand-by lamp turns off the lights.
.

2. Test switch (TEST)

This button switch is for checking the operation of back-up system. Pressing this switch is resulted
in the release of LCO2 gas into the freezer chamber with regardless the condition. A battery lamp
is turned on when battery capacity decreases at this time. Push a back-up test switch for the life
test of the battery sometimes.

3. Temperature setting knob (TEMP. SET)

With this knob, set the temperature at which the system is operated. The effective set temperature
range is between -50oC and -70oC.

4. Back-up stand-by lamp (BACKUP STANDBY)

It is the lamp turned on by ON/OFF of the back-up power switch. (GREEN color)

5. Battery lamp (BATTERY)

A power failure and a back-up test switch are pushed, and CO2 gas appears, and it is turned on when
battery capacity decreases.(ORANGE color).

CAUTION
Batteries are expendable supplies. Exchange it for about every three years. And, entrust a dealer or
sales with the exchange of the battery, and cooperate with recycling of the battery after the use.
When a battery declines by the power failure, a back-up unit stops working, and an exchange is
recommended because a contents thing can not be protected any more.

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 TRIAL OPERATION
Following is the procedures for the trial operation of the back-up system. Read an instruction manual
enclosed with a ultra-low temperature freezer carefully before the trial operation.

1. Check that the gas cylinder connect pipe is connected properly between the LCO2 solenoid valve and
the gas cylinder. The connection should be done by qualified engineers or service personnel only.

2. Set the ultra-low temperature freezer at desired temperature and run the freezer until it reaches the set
temperature.
Note: CO2 gas will be released automatically without pressing the test switch when turn on the
back-up system if the set temperature of the freezer is higher than that of the back-up
temperature.

3. Set the temperature setting knob to the temperature 10oC or more higher than the set temperature of
the freezer.

4. Turn on the back-up system with the freezer door closed. Check that the indicator on the door switch
ass’y is on.

5. Press the test switch to check that the CO2 gas is released into the freezer chamber.

Stop the operation immediately and contact your dealer or sales representative if there is something
wrong with the back-up system during the trial operation and it is still existing after careful check of the
procedure.

WARNING
Check the gas piping before trial operation to avoid gas leakage.
Attach the back-up unit cover before starting the trial operation. The operation without the cover
may cause electric shock.

CAUTION
Stop the operation immediately and review the attachment procedure carefully if there is something
wrong with the back-up system during the trial operation.

Calibration
In the case that there is a difference between the chamber temperature and displayed temperature,
Adjust the displayed temperature by the method of the service technical manual.

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 SPECIFICATIONS
Name Back-up System for Ultra-Low Temperature Freezer
Model CVK-UB4 CVK-UB4(I)
Outer dimensions W286 x D87 x H520 mm
Applicable model MDF-C8V
Applied gas Liquid CO2 gas
Temperature control Gas type thermostat
Door switch Door operation-related ON/OFF
Indicator Back-up switch-related ON/OFF
Accessories Mounting kit (except for gas cylinder) Mounting kit (except for gas cylinder)
Tank connecting tube: mm size Tank connecting tube: inch size
Power source AC 115 V / AC 230 V (supplied from a freezer)
Battery DC 24 V, 4 Ah, Automatic recharge
Weight 11 kg
Optional component Mounting plate (MDF-UBK)
Note Design or specifications will be subject to change without notice.
The battery for power failure alarm is an article for consumption.
It is recommended that the battery will be replaced about every 3 years. Contact Sanyo sales
representation or agent at the time of replacement of the battery for recycling.

PERFORMANCE
Temperature range -50 to –70oC
Approx. 13 hours (liquid CO2 gas cylinder of 30 kg)
Duration
(ambient temp.; 30oC, set temp.; -70oC, no load,)
Maximum power consumption 6W
Usable environment Temperature; -5 to +30oC, Humidity; Less than 80% RH
Note:
The back-up system is operated with an installed battery in the event of power failure.
About two-day operation of a freezer is necessary to full charge the battery.

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 JK1659-150B
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