User manual

40
Troubleshooting
The table below give indication about self diagnostic routine. Some of error code requires activities exclusively for Authorized
Service Center.
Outdoor unit
If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER PCB.
No. Error Code Meaning 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 E153 Error on float switch (2nd detection)
"Indoor unit Float Switch Open/
Short
Drain Pump operation Check"
6 E154 Indoor fan error
Check on indoor unit indoor Fan
operation
7 E198 Error on thermal fuse of indoor unit (Open)
Thermal Fuse Open Check of
indoor unit Terminal Block
8 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
9 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
10 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
11 E221 Error on outdoor temperature sensor (Short or Open)
Check Outdoor sensor Open /
Short
12 E231 Error on outdoor COND OUT sensor (Short or Open)
Check Cond-Out sensor Open /
Short
13 E251
Error on discharge temperature sensor of compressor 1 (Short or
Open)
Check Discharge sensor Open /
Short
14 E320 Error on OLP sensor (Short or Open) Check OLP sensor Open / Short
15 E403 Compressor down due to freeze protection control Check Outdoor Cond.
16 E404 System stop due to overload protection control Check Comp. when it start
17 E416 System stop due to discharge temperature -