Aiwa -09CHSRINV/TP11 Service Manual page 56

3.2.18 F7---Module temperature protection.
IPM overtemperature protection, when IPM temperature more than 95℃, it will show F7.
Display F7
IPM well contact
to heat sink?
Yes
ODU cooling system
abnormal? Compressor
with big running current?
(9,12K:6-7A,
18,24K:7-9A)
No
No
IPM temperature
circuit abnormal?
Replace ODU PCB
End
Air Conditioner Service Manual
No
Any dust or gap btw
IPM & heat sink?
Check the screw
fully fasten?
Fix the screw
Yes
F7 disappear?
Yes
End
Yes Clean or adjust the gap
btw IPM and heat sink
No
Yes
No
Low pressure normal?
No
Is the 2/3way valve
Open the valve
Yes
Capillary blocked?
Replace capillary
Yes
Clean condenser /
evaporator
Yes
F7 disappear?
No
Yes
（0.8-1.2Mpa）
No
fully opened?
Yes
No
Condenser /
evaporator dirty?
No
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