TCL TAC-18CSD/XA81I

TCL Air Conditioner Service Manual
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46
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3.2.12 P4 ---ODU Discharge temperature overheating protection
Display P4
ODU temperature
higher than 60
℃?
Normal protection
Unit operate?
ODU location
acceptable?
Enough space for
ventilation?
Adjust ODU
installation
Condenser too
dirty? or filter
blocked?
IDU/ODU fan motor
running slowly or
stopped?
Capillary blocked?
Is the unit gas
pressure normal?
(cooling0.8-1.3Mpa,
heating2.0-3.6Mpa)
Replace ODU PCB
Clean IDU filter or
ODU condenser.
Fan blade
blocked?
Adjust
Replace fan
motor or PCB
Replace
capillary
Charge gas
End
Y
es
P4 disappear?
Problem solved?
Problem solved?
No
Y
es
No
Y
es
No
No
Y
es
Y
es
Y
es
No
No
No
Y
es
Y
es
No
Y
es
No
Y
es
Y
es
Y
es
No
No
No
Y
es
No
Problem solved?