19
Duct Type Split Air Conditioner
Service Manual
CONTROL
ON
ON
Time 
ON
OFF
ON
OFF
Defrosting end 
OFF
(anti cold air )
(AEH working condition)
OFF
ON
Control object
Compressor 
Outdoor fan 
Indoor fan 
4-way valve
Auxiliary electric 
heater
If the unit heats for 45min accumulatively, the compressor continuously runs for 4min and 50s, and T 
condensate
≤
-5
℃
 for 1s, defrosting will start. 
If the unit defrosts for 10min or T condensate
≥
10
℃
, defrosting will end. 
3.WIRED REMOTE CONTROLLER
3.1 Displaying Part
Fig.3.1 Outline of wired controller
3.1.1 LCD Display of Wired Controller
Fig.3.2 LCD display