Aiwa -09CHSRINV/TP11 Service Manual page 53

3.2.15 P8---Outdoor Overtemperature/Under-temperature protection
When environment temperature as below condition, the compressor will stop working, after 200s delay, the IDU will
show P8 failure code.
(1). On Cooling or Dry mode: ODU ambient temperature: OAT＜-20℃ or OAT＞63℃;
(2). On Heating mode:
a. OAT≥40℃ or
b. 30℃＜OAT≤40℃ and RT＞35℃
Display P8
Ambient
temperature under
spec. range?
Yes
The sensor open
or short circuit?
Yes
Replace OAT sensor
Yes
P8 disappear?
No
Replace ODU PCB
End
Air Conditioner Service Manual
No
No enough space for
ODU ventilation?
No
No
Yes
Change ODU
location
No
P8 disappear?
Yes
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