23
DIAGNOSTIC GUIDES
Table 17—Diagnostic Guides Indoor Units
OPERATION LAMP
TIMER LAMP
DISPLAY
LED STATUS
H
1 time
X
E
0
Indoor unit EEPROM parameter error
H
2 times
X
E1
Indoor / outdoor units communication error
H
4 times
X
E3
Indoor fan speed has been out of control
H
5 times
X
E4
Indoor room temperature sensor T1 open circuit or short circuit
H
6 times
X
E5
Evaporator coil temperature sensor T2 open circuit or short circuit
H
7 times
X
EC
Refrigerant leakage detection
H
1 time
O
F0
Overload current protection
H
2 times
O
F1
Outdoor ambient temperature sensor T4 open circuit or short circuit
H
3 times
O
F2
Condenser coil temperature sensor T3 open circuit or short circuit
H
4 times
O
F3
Compressor discharge temperature sensor T5 open circuit or short circuit
H
5 times
O
F4
Outdoor unit EEPROM parameter error
H
6 times
O
F5
Outdoor fan speed has been out of control
H
1 time
P0
IPM malfunction or IGBT over-strong current protection
H
2 times
P1
Over voltage or over low voltage protection
H
3 times
P2
High temperature protection of compressor top diagnosis and solution
H
5 times
P4
Inverter compressor drive error
O(light) X
(
off)
H
(
flash)
