Contents
1. Safety Caution .....................................................................................................73
2. General Troubleshooting ....................................................................................74
3. Error Diagnosis and Troubleshooting Without Error Code ...............................77
3.1 Remote maintenance ...................................................................................77
3.2 Field maintenance .......................................................................................78
4. Quick Maintenance by Error Code ......................................................................83
5. Troubleshooting by Error Code ...........................................................................84
5.1 Common Check Procedures.........................................................................84
5.2 E0/F4/EA (EEPROM parameter error) ............................................................86
5.3 E1 (Indoor and outdoor unit communication error) ......................................87
5.4 E3/F5 (Fan speed is operating outside of the normal range) .........................89
5.5 E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis
and solution) ...............................................................................................91
5.6 Eb (Communication error between the indoor PCB and display board) .........92
5.7 EC (Refrigerant Leakage Detection diagnosis and solution) ..........................93
5.8 F0(Overload current protection diagnosis and solution) ................................94
5.9 P0(IPM malfunction diagnosis and solution) .................................................95
5.10 P1(Over voltage or too low voltage protection diagnosis and solution) .........96
Troubleshooting
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