Aiwa -09CHSRINV/TP11 Service Manual page 49

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