Service manual

59
For 12000 BTU, 230 V, 20 SEER, Heat Pump
After power on, LED1(Blue color) will be slow flash(0.2Hz) when the unit is in standby and
quick flash (2.5Hz) if the unit has some problems.
No. Problems
LED6
(Green)
LED5
(Red)
IU display
1 standby for normal O X
2 Operation normally X O
3 IPM malfunction or IGBT over-strong current protection
☆
X P0
4 Over voltage or too low voltage protection O O P1
5 Over voltage or too low voltage protection O ☆ P1
6 Inverter compressor drive error X
☆
P4
7 Inverter compressor drive error
☆
O P4
8 Inverter compressor drive error
☆ ☆
P4
O（light） X（off） ☆（2.5Hz flash）