3.
Alignment and Adjustments
3-1 Error mode and check method
3-1-1 Indoor Unit
■ MH✳✳✳FVEA/MH✳✳✳FBEA
Display Explanation Main checking Point / Remark
Communication error (unable to receive data) Communication cable connection
Communication error (outdoor cannot communicate) Another indoor unit or indoor PCB
Indoor unit room temperature sensor error (Open/Short) Room temperature sensor, indoor PCB
Indoor unit heat exchanger in temperature sensor error
Heat exchanger in sensor, indoor PCB
(Open/Short)
Indoor unit heat exchanger out temperature sensor error
Heat exchanger out sensor, indoor PCB
(Open/Short)
Indoor unit heat exchanger in temperature sensor detached Heat exchanger in sensor
Indoor unit heat exchanger out temperature sensor detached Heat exchanger out sensor
Indoor unit heat exchanger in & out temperature sensor
Heat exchanger in & out sensor
detached
Indoor unit float switch second detection -
Indoor unit fan motor malfunction Fan motor and cable
More than 2 indoor units cool and heat simultaneously Another indoor unit operation mode
EEPROM error Indoor PCB
Option code setting error Option code
Cable miss-wiring Cable connection (Indoor & Outdoor unit)
MPI error malfunction MPI
Cable connection (another indoor unit &
The number of indoor unit mismatched
outdoor unit), SW01(outdoor)
Compressor discharge sensor error(Short/Open) Outdoor unit
Outdoor unit error Outdoor unit (Error code)
Samsung Electronics 3-1
Alignment and Adjustments
■ MH✳✳✳FNEA/MH✳✳VF1-✳✳
Indicators
Description OPERATION TIMER TURBO Main Checking Point
Indoor unit room temperature sensor error -
(open or short)
Indoor unit heat exchanger temperature sensor error -
(open or short)
Indoor fan motor malfunction -
EEPROM error Option Setting
Option error
Option Setting
(option wasn t set up or option data error)
Remote Control on/off
Outdoor unit error Outdoor Unit Power Reset
Indoor unit communication error
Outdoor unit communication error
Simultaneous operation error
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
3-2 Samsung Electronics
Alignment and Adjustments
■ MH✳✳✳FKEA/MH✳✳✳FSEA/MH✳✳✳FMEA
Indicators
MH✳✳✳FKEA
Green Red Yellow Green Orange
Abnormal conditions MH✳✳✳FSEA Operating
MH✳✳✳FMEA
Power reset
Error of temperature sensor in indoor unit (OPEN/SHORT)
Error of heat exchanger sensor in indoor unit
Error of heat exchanger OUT sensor in indoor unit
Error of outlet temperature sensor in indoor unit
(OPEN/SHORT): For heat pump models only
Error of mixed operation
Error of indoor fan motor : Below 450RPM for 15 minutes
Error of outdoor temperature sensor
Error of CONDENSER sensor
Error of DISCHARGE sensor
1. No communication for 2 minutes between indoor unit and Error of indoor unit:
outdoor unit (communication error for more than Displayed on the
2 minutes) indoor unit
2. Indoor unit receiving the communication error from regardless of
outdoor unit operation
3. Outdoor unit tracking 3 minutes error
4. When sending the communication error from outdoor unit
due to the mismatching of the communication numbers
and installed numbers after completion of tracking
(communication error for more than 2 minutes)
1. 2nd detection of refrigerant completely leak Displayed on
appropriate indoor
2. 2nd detection of high temperature CONDENSER
unit which is
3. 2nd detection of high temperature DISCHARGE operating Displayed
4. Compressor down due to 6th detection of freezing on outdoor unit
Error of float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
Samsung Electronics 3-3
Alignment and Adjustments
■ MH✳✳✳FJEA
LED lamp display
Abnormal conditions White Remarks
Power reset
Error of temperature sensor in the indoor unit
(Open/Short)
Error of heat exchanger sensor in the indoor unit
Error of the outdoor temperature sensor
Error of the condensor temperature sensor
Error of the discharge temperature sensor
1. No communication between indoor and outdoor unit 1. Indoor unit error
for 2 minutes (Display is unrelated
2. Error on the communication received from outdoor unit with operation)
3. Outdoor unit tracking time out (3 minutes) 2. Outdoor unit error
4. Number of installation does not match after tracking (Display is unrelated
with operation)
Indoor fan motor is non-operative Indoor motor fan error
Indoor fan motor is operating slowly
Indoor fan motor is operates at an excessive speed
Simultaneous cooling/heating operation error
(Multi model only)
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
3-4 Samsung Electronics
Alignment and Adjustments
■ MH✳✳✳FJEA(cont.)
LED lamp display
Abnormal conditions White Remarks
[Self diagnosis ]Power voltage detection
between indoor and outdoor unit communication
cable
[Self diagnosis ]Outdoor unit refrigerant
leakage(Gas leak)
[Self diagnosis ]Outdoor fan restriction error
[Inverter ]Inverter compressor operation failure
[Inverter ] DC peak error
[Inverter ]DC Link voltage 150V or less,410V or more
[Inverter ] Compressor rotation error
[Inverter ]Electric current error
[Inverter ]DC Link sensor error
[Inverter ]EEPROM READ/WRITE error
[Inverter ]Inverter zerocrossing error
Setting the outdoor unit capacity option error
EEPROM error
EEPROM option error
MPI no feedback Error
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
Samsung Electronics 3-5
Alignment and Adjustments
■ MH✳✳✳FEEA/MH✳✳✳FUEA
The error indicated on the LED display of Indoor unit
Indicators
Concealed Type
Abnormal conditions Operating
Blue Red
Standard Type
Power reset
Displayed on
Error of temperature sensor in indoor unit(OPEN/SHORT) appropriate indoor unit
which is operating
Error of heat exchanger sensor in indoor unit Displayed on
Error of heat exchanger OUT sensor in indoor unit appropriate indoor unit
Error of outlet temperature sensor in indoor unit which is operating
(OPEN/SHORT): For heat pump models only
Error of mixed operation
Displayed on
Error of outdoor temperature sensor appropriate indoor unit
Error of COND sensor which is operating
Error of DISCHARGE sensor Displayed on outdoor
unit
1. No communication for 2 minutes between indoor unit 1. Error of indoor unit :
and outdoor unit (communication error for more than Displayed on the
2 minutes) indoor unit regardless
2. Indoor unit receiving the communication error from of operation
outdoor unit
3. Outdoor unit tracking 3 minutes error 2. Error of outdoor unit :
Displayed on the
4. When sending the communication error from outdoor
indoor unit which is
unit the mismatching of the communication numbers
operating
and installed numbers after completion of tracking.
(communication error for more than 2 minutes)
Self-diagnostic error Displayed on
(including the indoor unit not detected) appropriate indoor unit
1. Error of electronic expansion valve close which is operating
2. Error of electronic expansion valve open Displayed on outdoor
unit
3. Breakaway of EVA OUT sensor
4. Breakaway of EVA IN sensor
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.
3-6 Samsung Electronics
Alignment and Adjustments
■ MH✳✳✳FEEA/MH✳✳✳FUEA(cont.)
The error indicated on the LED display of Indoor unit
Indicators
Concealed Type
Abnormal conditions Operating
Blue Red
Standard Type
5. Breakaway of COND MID sensor Displayed on appropriate
6. 2nd detection of refrigerant completely leak indoor unit which is
operating
7. 2nd detection of high temperature COND
Displayed on outdoor
8. 2nd detection of high temperature DISCHARGE unit
9. COMP DOWN due to 2nd detection of low pressure
switch
10. Error of reverse phase
11. Compressor down due to 6th detection of freezing
12. Self-diagnosis of condensation sensor (G8, G9)
13. Compressor down due to condensation ratio control
Error of float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.
Samsung Electronics 3-7
Alignment and Adjustments
3-1-2 Outdoor Unit
Display EXPLANATION(The error indicated on the PCB display of outdoor unit) REMARK
Check electrical connection
Communiaction error(indoor unable to receive data)
and setting
Outdoor unit communication error Check electrical connection
(Abnormal data from indoor unit over 60 packet) and setting
Indoor unit room temperature sensor error (Open/Short)
Indoor unit heat exchanger in temperature sensor error (Open/Short)
Indoor unit heat exchanger out temperature sensor error (Open/Short)
Indoor unit sensor error-Evaporator pipe in sensor - Self diagnosis
Indoor unit sensor error-Evaporator pipe out sensor - Self diagnosis
Indoor Unit FAN Error
More than two indoor units cool and heat simultaneously
Indoor Unit EEPROM Error
Indoor Unit EEPROM Option Error
Check electrical connection
Failure of pipe check operation
and setting
No pipe check operation check
- occasion : try to operation after the installation through auto addressing Check setting
mode without pipe check operation.
Check electrical connection
The number of Indoor unit mismatched
and setting
Check electrical connection
Communication error between the outdoor and indoor unit
and setting
Outdoor communication error between main PCB and sub PCB
Outside temperature sensor error(Short/Open)
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)
Condenser temperature sensor error(Short/Open)
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)
Outdoor unit sensor error - Condenser out sensor(Short/Open) - Self diagnosis
Compressor Discharge temperature sensor error
Compressor discharge sensor detached - Self diagnosis
Compressor OLP sensor error (Short/Open)
- Error condition : outdoor temperature under -20˚C
- Error level : over 4.95V(-30˚C) under 0.5V(151˚C)
3-8 Samsung Electronics
Alignment and Adjustments
Outdoor Unit(cont.)
Display EXPLANATION(The error indicated on the PCB display of outdoor unit) REMARK
check pipe lenght, indoor
Outdoor unit freezing(Compressor stop) unit filter, refrigerant leakage/
charge and service port
check pipe lenght, refrigerant
Outdoor unit overload - Safety control(Compressor stop)
leakage/charge
Outdoor unit high discharge temperature - Safety control check pipe lenght, refrigerant
(Compressor stop) leakage/charge
Outdoor unit EEV open (Stopped indoor unit s) -Self diagnosis
Outdoor unit EEV open (operating indoor unit s) -Self diagnosis
High temperature(over 30˚C) of outdoor as heating mode
Low temperature(under -10˚C) of outdoor as cooling mode
Outdoor Fan Error
Communication cable mismatched between indoor and outdoor unit Check electrical connection
Inverter compressor starting failure (5 times)
Compressor trip by input current control mode (PFC over current)
Compressor trip by OLP temperature control mode
DC peak error (IPM Over Current)
Compressor Vlimit Error
DC link Voltage error (under 150V, over 410V)
Abnormal compressor running
(Compressor Rotation Error)
Current sensor error
DC link Voltage sensor error
OTP Error
Inverter micom zero-crossing error
NO GAS error(self diagnosis) Piping(gas leak)
Samsung Electronics 3-9
