1. Safety Caution .....................................................................................................50
2. General Troubleshooting ....................................................................................51
3. Error Diagnosis and Troubleshooting Without Error Code ...............................52
3.1 Remote maintenance ...................................................................................52
3.2 Field maintenance .......................................................................................53
4. Quick Maintenance by Error Code ......................................................................58
5. Troubleshooting by Error Code ...........................................................................59
5.1 Common Check Procedures.........................................................................59
5.2 E0/F4/EA (EEPROM parameter error) ............................................................61
5.3 E1 (Indoor and outdoor unit communication error) ......................................62
5.4 E3/F5 (Fan speed is operating outside of the normal range) .........................64
5.5 EF (Intelligent eye module error diagnosis and solution) ...............................66
5.6 E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis
and solution) ...............................................................................................67
5.7 Eb (Communication error between the indoor PCB and display board) .........68
5.8 F0(Overload current protection diagnosis and solution) ................................69
5.9 P0(IPM malfunction or IGBT over-strong current protection diagnosis and
solution) ......................................................................................................70
Troubleshooting
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