4.

Troubleshooting

4-1 Error Code Numbering Rule

1. ERROR CODE NUMBERING RULE is applied to a microwave oven and an oven.(CMO, OTR, Grill, Convection,
Commercial etc.)
2. All sensors and devices have their own number. ex) Gas Sensor = 1, Temp. Sensor = 2, ...
3. Of each device, No.1 and No.2 refer to “Open Error” (not sensed) and “Short Error”, respectively.
4. This numbering rule has been applied to models to have been developed since January, 1, 2005. (But, GE or
Customize model are excluded.)

DEVICE ERROR CASE

0- Others 1- Open
1- Gas Sensor 2- Short
2- Temp. Sensor •
3- Weight Sensor •
4- Easy/PH Sensor •
5- EEPROM
•
•
•
4-2 Error Code List
Gas Sensor
Error Gas Sensor Error
Solution Page
Code Case (E-1X)
E-11 Open 19 Page
Check Sensor part ,connection of sensor housing and PCB’s
E-12 Short 20 Page
connector.
E-13 T1 Max Time Error
21 Page
E-14 Dry Up / No Load Insert food and restart.

Temp Sensor
Error
Temp. Sensor Error Case (E-2X) Solution Page
Code
E-21 Open Check sensor part and connection of 19 Page
E-22 Short sensor housing and PCB’s connector. 20 Page
E-23 T1 Max Time Error (Preheating not completed) 30 Page
Check heater.
E-24 Over temperature error 32 Page
In case abnormal temperature is sensed at Micro
E-25 Cool down set and restart. 33 Page
Cook
In case the temperature is not over the fixed AD in
E-26 Check sensor and heater. 30 Page
first 3 minutes after cooking by heater starts.
Eeprom Error
Error Code EEPROM Error Case (E-5X) Solution Page
E-51 Open (Sense Failure)
E-53 Read/Write Error Replace EEPROM and restart. 26 Page
E-54 Zero not to be set

15
4. Troubleshooting

Weight Sensor
Error
Gas Sensor Error Case (E-1X) Solution Page
Code
E-31 Open (When value of HEX is above “FF” for 5 seconds) 19 Page
E-32 Short 20 Page
In case the initial value of HEX is under “14” for 30
E-33
seconds while a weight sensor in operation. Check Sensor.
In case the initial value of K calculated by a weight 23 Page
E-34
sensor is above and under “±28” as value of HEX.
E-35 In case the value of A is “-” as a weight sensor calculates.
Cancel the present mode and
E-36 In case the door opens during sensor cooking. 24 Page
restart from the begining.
Easy/Ph Sensor
Error
Easy/PH Sensor Error Case (E4) Solution Page
Code
E-41 Open 19 Page
E-42 Short Check Sensor. 20 Page
E-43 T1 Max Time Error 21 Page
E-44 Dry Up Insert food and restart. 21 Page
E-45 Cooling Error (3minutes) Remove moisture from sensor and restart. 25 Page
E-46 Primary Open Error(3minutes) Check Sensor. 19 Page
Cancel the present mode and restart from the
E-47 The door opens during cooking 24 Page
begining.
Humidity Sensor
Error Code Humidity Sensor Error Case (E-6X) Solution Page
E-61 Open 19 Page
E-62 Short Check Sensor. 20 Page
E-63 T1 Max Time Error 21 Page
Others
Error Code Others (E-0X, Letter) Solution Page
-SE- Key Short Error (10 seconds) Turn off set and restart. 22 Page
E-02 Cooking Time Setting Over Error (MWO)
E-03 Cooking Time Setting Over Error (Grill)
Cooking Time Setting Over Error Check each mode’s setting time. 31 Page
E-04
(Convection)
Cooking Time Setting Over Error
E-05
(Combination)
It fails to sense that the swing heater has Check Swing heater’s motor and
E-06 34 Page
stopped for 20 seconds during cooking. connector.
In case function of MWO starts with spit
E-08 Restart after remove spit. 30 Page
inserted into cavity inside.
In case the damper is not set to be
E-09 Check damper and connector. 32 Page
positioned for 2 minutes.

16
4. Troubleshooting

4-3 Electrical Malfunction

4-3-1 Sensor Open Error

“E-11, E-21, E-27, E-29, E-31, E-32, E-41, E-46, E-61, or E-62” is displayed.

Connect the sensor. YES

Is the sensor disconnected? : Check if the sensor housing
is inserted into the connector
of the main PCB.

NO

Connect the NO Is the sensor wire

: Check if the sensor wire is damaged, if the
wire properly. connected properly?
housing is loose and if the sensor and the
wire are properly connected.

YES

Does the voltage change

S/W Error : Check if the voltage of the GND and sensor
as the humidity, temperature
and weight change? changes using a digital multi-meter
by forcefully changing the humidity, temperature
and weight.
NO

NO After Power -> On, does

the symptom continue? The sensor is out of order.

YES

Replace the PCB.

Replace the sensor.

Perform the operation again and check if it

is working properly.

17
4. Troubleshooting

4-3-2 Sensor Short Error

“E-12, E-22, E-28, E-32, E2A, E-42, or E-62” is displayed.

Remove the shorted part YES

Is the sensor shorted? : Check if both terminals of the
of the temperature sensor. sensor are slightly shorted.

NO

YES Is the sensor terminal part

Remove any foreign : Check if the sensor and related
Substance from the of the PCB shorted? parts such as the connector or
shorted part. soldering parts are slightly shorted.

NO

YES Does the voltage change

S/W Error as the humidity, temperature : Check if the voltage of the GND and
and weight cha sensor changes using a digital multi-meter
by forcefully changing the humidity,
temperature and weight.
NO
NO After Power > On, does
the symptom continue?
The sensor is out of order.

YES

Replace the PCB.

Replace the sensor.

Perform the operation again and

check if it is working properly.

18
4. Troubleshooting

4-3-3 Sensor Max Time Error

“E-13, E-14, E-43, E-44, E-63,” is displayed..

Insert food YES Does it heat up without : Since heating without placing food into
and heat it again. placing food into it? the oven may damage the product, take care.

NO

YES
Place food with Does it heat with completely : Since heating completely dried food
moisture into it and dried food? may burn the food, take care.
heat it again.

NO

Remove the an Is any foreign substance

YES
foreign substance on the sensor or is something acting as an : If the sensor is contaminated by a foreign
or obstacle. obstacle in front of the sensor? substance, it may fail to detect the humidity.

NO

The sensor is out of order.

Replace the sensor.

Perform the operation again and check if it

is working properly.

19
4. Troubleshooting

4-3-4 Key Short Error

“- SE -” is displayed.

YES Is the key not recognized

at all?

NO

YES Is the key recognized

intermittently?

NO

YES Is a specific key

not recognized?

NO

The membrane
is defective.
S/W Error

Replace the
Control Panel.
NO After Power > On,
does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

20
4. Troubleshooting

4-3-5 Weight Sensor Error

“E-33, E-34 or E-35” is displayed.

NO Has the turntable

been placed over the roller
properly?
Place the turntable over
the roller properly.
YES

YES Is the weight sensor

Remove the foreign contaminated by any foreign
substance. substance?

NO

YES Does the roller turn

Place the food and press against the : Check if the turntable turns abnormally
in the center. weight sensor? because food is placed on one side
only, or if it turns irregularly,
or if it is slanted and the
NO weight sensor is not pressed.

The sensor is out of order.

Replace the sensor.

Perform the operation again and check if it

is working properly.

21
4. Troubleshooting

4-3-6 Weight Sensor Error

“E-36 or E-47” is displayed.

YES
Close the door. Was the door open during
the operation?

NO

NO
Check the Door S/W Is the door sensing part normal? : Check the housing connected to
and the housing. the door S/W and PCB and if it is
opened or shorted intermittently.
YES

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

22
4. Troubleshooting

4-3-7 Cooling Error

“E-45” is displayed.

Remove any moisture YES

Is the sensor wet? : To remove moisture from the sensor,
of the sensor. open the door for 5 minutes.

NO

YES
Check the sensor Is the sensor voltage over 3V? : Check if the GND and sensor terminal
terminal and housing. is maintained over 3V continuously during
the initial cooking course using a multi-
meter.
NO

NO Does the same symptom

Replace
continue after replacing
the sensor.
the sensor?

YES

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

23
4. Troubleshooting

4-3-8 EEPROM Error

“E-51, E-53, or E-54” is displayed.

NO
Insert and solder EEPROM이 삽입been
Has the EEPROM 되었는가?
inserted? : An R4LCO40 or 24LCO4 EEPROM
an EEPROM is to be used. Check if a proper EEPROM
has been installed.

YES

Replace the YES IsEEPROM

the EEPROM 단자가 terminal opened or
Open/Short
EEPROM and repair
is there a short-circuit?
되었는가?
the short circuit.

NO

EEPROM Defect

Replace the EEPROM

YES
Does it work properly?

NO

S/W Error
S/W 오동작

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

24
4. Troubleshooting

4-3-9 Divider Missing Error

“dE” is displayed.

NO Is the Cooking Mode

Twing?

NO YES
Single Mode?

YES YES
NO Is it Upper, Is the Divider detection Replace S/W
Lower Mode? S/W out of order?

YES NO
Is divider inserted?

YES
Is divider inserted? YES
NO
Is the Divider detection S/W Connect correctly wire.
NO connected properly?

Remove the Divider. YES

Insert divider

Are the connections in the NO

Connect correctly.
Main PCB normal?

YES

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

25
4. Troubleshooting

4-3-10 Over Time Error

“S-01” is displayed.

YES Is it temperature
100°C in oven?

Has it worked for NO

6 hours continuously?
Is it temperature YES
NO 105°C~240°C in oven?

Re-check the Cut-Off-Time NO Has it worked for

for the corresponding 8 hours continuously?
internal temperature.
YES Is it temperature
245°C in oven? NO

YES NO Re-check the Cut-Off-Time

Does same error arise? for the corresponding
internal temperature.
YES Has it worked for
4 hours continuously?

S/W Error
YES
Does same error arise?
Re-check the Cut-Off-Time
for the corresponding
NO After Power > On, internal temperature. NO
does the symptom continue?

YES YES
Does same error arise?

Replace the PCB. NO S/W Error

NO After Power > On,

Turn the oven off and does the symptom continue?
let it cool sufficiently.

YES
Replace the PCB.

Perform the operation again and check if it

is working properly.

26
4. Troubleshooting

4-3-11 Over Time Error

“ E-0b, E-2b, E-2C, Ot” is displayed.

YES Is the temperature

An “E-2b” error sensor of the PCB open?
occurred.

NO

Insert the Was there a short- YES

temperature sensor. circuit in the temperature An “E-2C” error occurred.
sensor of the PCB?

NO
Repair the short circuit.

YES Is the temperature

of the PCB over 90°C?

An “E-0b” error NO NO
occurred. Is the Cooling Motor
rotating?

YES S/W Error

Check the Motor The temperature

drive part. sensor is out of order.

NO After Power > On,

does the symptom
Replace the
continue?
temperature sensor.

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

27
4. Troubleshooting

4-3-12 Preheating Error

“ E-08, E-23, E-26” is displayed.

Check the heater NO

Does the heater work? : Check the voltages of
related drive part.
both heater terminals.

YES

Replace the YES

Is the heater temperature : After operating the heater for more then
heater. very low? 10 minutes check if the heater temperature
remains low.
NO

Reconnect the NO Is the temperature sensor

temperature
connected properly?
sensor properly.

YES

Is the resistance
Replace the YES between the heater terminals : A normal heater’s resistance is a few Ω.
heater. more then a few MΩ? A short circuit increases the resistance
to a few MΩ.
NO

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

28
4. Troubleshooting

4-3-13 Cooking Time Over Selection Error

“E-02, E-03, E-04, or E-05” is displayed.

Is this
YES happening during
the MW operation?

NO
Is it
happening during YES
the Grill operation?
NO
Over Time is NO Over Time is
set? set?
Is it
happening during YES YES
YES the Convection
operation?
An “E-03” error
An “E-02” error occurred.
occurred. NO Over Time is
NO set?

Is it
YES happening during YES
the Combination
operation?
An “E-04” error
NO occurred.
NO
Over Time is
set?

YES
Press the Cancel
An “E-05” error key to cancel the
occurred. current state.

Press the Cancel

key to cancel the
current state.

Repeat the operation and check

if it is working properly. : Since the max. time may differ
depending on the model,
refer to the IB
For example,

Ex) MW Mode Max Time

Grill 60 mins
Convection 45 mins
Conbination 45 mins

29
4. Troubleshooting

4-3-14 Internal Oven Temperature Abnormal Error

“ E-0A, E-09,E-24,
“E-09, E-24” error
E-0A” 가code
표시된다is displayed.

An “E-09” error YES Is the oven internal temperature

occurred. maintained over 320 degrees?

NO

An “E-24, E-0A” error YES Has the oven internal temperature

occurred. reached over 350 degrees?

NO

Reconnect the NO Is the temperature

NO sensor
temperature connectivity normal?
sensor properly.

YES

Check
히터 and repair
the구동부를
heater NO Is the temperature sensor
TurnOven을
the oven
Offoff하고
and let drive
점검 part if
수리한다 connectivity normal?
it 충분히
cool sufficiently.
식힌다. necessary.

YES

S/W Error

NO After Power > On,

does the symptom
continue?

YES

Replace the PCB.

Perform the operation again and check

if it is working properly

30
4. Troubleshooting

4-3-15 Swing Heater Detection Error

An “E-25” error occurred.

NO
Is the oven in MW mode?

YES

An “E-25” error YES

occurred. Is the internal temperature
Press the Cancel key. over 200 degrees?

NO
Press the Cancel
key to cancel the
current state. Connect it NO
properly Is the sensor connectivity
and try again. normal?

YES

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and check if it

is working properly.

31
4. Troubleshooting

4-3-16 Swing Heater Detection Error

An “E-06” error code is displayed.

NO Is the oven in
Bake Toast mode?

YES

After waiting for 20 seconds, NO Has the switch heater

check if the micro-switch has operated for 20 seconds?
been detected.

YES

Has the micro-switch NO The micro-switch is

been detected? defective Replace it.

YES

Is connectivity housing NO
Connect the
of the micro-switch normal?
micro-switch properly.

YES

S/W Error

NO After Power > On,

does the symptom continue?

YES

Replace the PCB.

Perform the operation again and

check if it is working properly.

32
4. Troubleshooting

4-3-17 If oven malfunction

Oven does not operate. *Inspection method

NO Is Primary interlock NO
Is Fuse OK?
switch normal?

YES

YES

NO
Is Power Relay normal?

Is the magnetron NO NO
temperature switch normal? Replace switch

Power supply circuit check point

YES

Is SMPS power supply NO Do check power supply NO

cirduit normal? circuit

YES

Is the IC01 output of NO Do check NO

PCB normal? Relay control circuit Relay control circuit check point

Is high voltage dioed

YES
normal?

Checking high Is high voltage dioed NO

voltagecircuts normal?

YES

Is high voltage NO
capacitor normal?

YES

Is magnetron normal? NO

33
4. Troubleshooting

4-3-18 If button malfunction

Buttons of the control panel do not work. *Inspection method

Are button pressed NO

Refer to User Manual
in the correct order?

YES Tact type

Is the connector of the NO

control panel normal?

YES

Replace PCB.

Menbrane type

34
4. Troubleshooting

4-3-19 If food is not heated even though an oven works

Food is not heated even though an oven works. *Inspection method

Is the latch switch NO

Method to control latch switch
operating normally?

YES

Checking high voltage circuits

35