Service manual 
34 
 
Current up
I restore
I fan
I 5min
I 3sec
Indoor fan: On
compressor: On 
outdoor fan:On
The outdoor fan turn 
off (heating)
The outdoor fan turn 
low speed (cooling)
Compressor turn off 
(after 5 minute later)
Compressor turn off 
(after 5 second later)
Current down
 
If compressor turns off for continuously 4 times due to current protection in 5 minutes from Compressor On, 
the unit stops and LED displays failure information and can’t returns to normal operation automatically. 
 
11.4  Fan-only mode 
Fan speed is high/mid/low/ Auto 
 
11.5  Cooling mode 
The 4-way valve is closed at cooling mode. 
The action of the compressor and the outdoor fan:(T=indoor temperature) 
 
 
Auto fan at cooling mode: 
3
T-Ts
Room temp. up
Room temp. down
5
High fan
Low fan
1
Mid. fan