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INDOOR UNIT DIAGNOSTIC GUIDES
Operation lamp Timer lamp Display LED STATUS
1time
X E0 Indoor unit EEPROM parameter error
2times
X E1 Indoor / outdoor units communication error
3times
X E2 Zero-crossing signal detection error
4times
X E3 Indoor fan speed has been out of control
5times
X E4 Indoor room temperature sensor T1 open circuit or short circuit
6times
X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
7times
X EC Refrigerant leakage detection
2times
O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit
3times
O F2 Condenser coil temperature sensor T3 open circuit or short circuit
4times
O F3 Compressor discharge temperature sensor T5 open circuit or short circuit
5times
O F4 Outdoor unit EEPROM parameter error
6times
O F5 Outdoor fan speed has been out of control
1times
P0 IPM malfunction or IGBT over-strong current protection
2times
P1 Over voltage or over low voltage protection
3times
P2
High temperature protection of compressor top diagnosis and solution (only for
9k,12k models)
5times
P4 Inverter compressor drive error
O(light) X(off) (flash)
DIAGNOSIS AND SOLUTION
EEPROM parameter error - diagnosis and solution (E0/F4)
Error C ode E0/F4
Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Supposed Causes
S Installation mistake
S PCB faulty
Trouble shooting:
If the EEPROM chip
is welded on main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip is
plugged into main PCB
well.
Yes
No
Yes
Correct the connection.
Replace the main PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
EEPROM: a read - only memory whose contents can be erased and reprogrammed using a pulsed voltage.
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