TCL TAC-07CHSA/XA71 Service Manual page 37

11.7 Vane does not operate at all.
Vane bending, structures
interference check
Connector check
(Broken/short circuit/mal-
connection)
11.8 Cooling/heating conversion is disable.
Air Conditioner Service Manual
Vane motor check
PCB assembly check(vane
motor driving circuit)
Heating operation ON by remote
controller
Connector check
If the 4-way valve is ON, "tick"
sounds.
4-way valve connection check
outdoor unit connecting wire check
Check the voltage of 4-way valve
coil
4-way valve coil resistance check
Replace the vane motor
Replace the PCB
PCB assembly
36