Troubleshooting
4-20
4-3-4. Error code [outdoor]
NO
Error code
Remarks Remarks
1 E108 Error due to repeated communication address Check on repeated indoor unit main address
2 E121
Error on room temperature sensor of indoor unit
(Short or Open)
Indoor unit Room Thermistor Open/Short
3 E122 Error on EVA IN sensor of indoor unit (Short or Open) Indoor unit EVA_IN Thermistor Open/Short
4 E123 Error on EVA OUT sensor of indoor unit (Short or Open) Indoor unit EVA_OUT Thermistor Open/Short
5 E143 Motion detection sensor error Check motion detection sensor
6 E153 Error on float switch (2nd detection)
Indoor unit Float Switch Open/Short Drain Pump
operation Check
7 E154 Indoor fan error Check on indoor unit indoor Fan operation
8 E162 EEPROM error (Hardware) Check the EEPROM PBA
9 E163 EEPROM option error Set the option setting
10 E198 Error on thermal fuse of indoor unit (Open)
Thermal Fuse Open Check of indoor unit
Terminal Block
11 E201
Communication error between indoor unit and outdoor unit
(Pre tracking failure or when actual number of indoor units are
different from the indoor unit quantity setting on the outdoor unit)
Error due to communication traking failure after initial power is
supplied.
(The error occurs regardless of the number of units.)
Check indoor quantity setting in outdoor
12
E202
Communication error between indoor unit and outdoor unit
(When there is no response from indoor units after tracking is
completed)
Check electrical connection and setting between
indoor unit and outdoor unit
13 E203
Communication error between outdoor unit inv -
main micom(For PF #4~#6 controller, error will be determined
from the time
when compressor is turned on)
Check electrical connection and setting between
indoor unit MAIN PBA - INVERTER PBA
14 E221
Error on outdoor temperature sensor (Short or Open)
Check Outdoor sensor Open / Short
15 E231
Error on outdoor COND OUT sensor (Short or Open)
Check Cond-Out sensor Open / Short
16 E251
Error on discharge temperature sensor
of compressor 1 (Short or Open)
Check Discharge sensor Open / Short
17 E320
Error on OLP sensor (Short or Open)
Check OLP sensor Open / Short
18 E403
Compressor down due to freeze protection control
Check Outdoor Cond.
19 E404
System stop due to overload protection control
Check Comp. when it start
20 E416 System stop due to discharge temperature
1. Check the refrigerant leakage
2. Relocate the outdoor unit
21 E422 Blockage detected on high pressure pipe
1. Check if the service valve is open
2. Check for refrigerant leakage
(pipe connections, heat exchanger)
and charge refrigerant if necessary
3. Check if there's any blockage on
refrigerant cycle(indoor unit/outdoor unit)
4. Check if additional refrigerant has
been added after pipe extension
22
E425 Reverse phase or open phase Check whether 3 phase is reversed or opened.
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