TCL TAC-09CSD/XAB1 Service Manual page 34

3.2.3 P7---Overheating protection on Cooling mode
On heating mode, when IDU evaporator coil temperature IPT≥62 ℃ , ODU PCB will switch off outdoor unit
and show P7 failure code.
Display P7
ODU fan motor
works normal?
Yes
Sensor loosing
from connector?
Yes
The sensor open or
short circuit?
Replace IPT sensor
Yes
P7 disappear?
Replace IDU PCB
End
TCL Air Conditioner Service Manual
No
No
Yes
No
Yes
Fan motor
broken?
No
Re-connect sensor
Replace fan motor
No
P7 disappear?
P7 disappear?
No
Yes
Yes
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