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9. Troubleshooting
9.1 Indoor Unit Error Display
Display LED
STATUS
E0
EEPROM parameter error
E1
Indoor / outdoor units communication protection
E2
Zero-crossing signal error
E3
Indoor fan speed out of control
E5
Open or short circuit of outdoor temperature sensor or outdoor unit
EEPROM parameter error
E6
Open or short circuit of room or evaporator temperature sensor
E7
Outdoor fan speed out of control
P0
IBM malfunction or IGBT over-strong current protection
P1
Over voltage or too low voltage protection
P2
Temperature protection of compressor top.
P4
Inverter compressor drive error
Note:
E4 & P3: Reserved function.
Outdoor unit error display:
On the outdoor PCB, there are two LED lights. One is green, the other is red. You can judge what the
error is through the status of the two lights.
Error
LED6
（
Green
）
LED5
（
Red
）
Indoor unit display
Over voltage or too low voltage protection
O
O
P1
Stand by
O
X
Over voltage or too low voltage protection
O
P1
Normal operation
X
O
Inverter compressor drive error
X
P4
Inverter compressor drive error
O
P4
IBM malfunction or IGBT over-strong
current protection
X P0
Inverter compressor drive error
P4
O
（
light
）
X
（
off
）
☆（
flash
）
