F7 Ipm Module Temperature Protection - Friedrich Chill Premier Inverter Series Service Manual

F7 IPM Module temperature protection.

3.2.19 F7---Module temperature protection.
IPM overtemperature protection, when IPM temperature more than 203 degrees F, it will
show F7.
ODU cooling system
abnormal? Compressor
with big running current?
Replace Main PCB
43
TROUBLESHOOTING
Display F7
No
IPM well contact
to heat sink?
Yes
(9,12K:6-7A,
18,24K:7-9A)
No
No
F7 disappear?
End
IPM temperature
circuit abnormal?
End
Any dust or gap btw
IPM & heat sink?
No
Check the screw
fully fasten?
No
Fix the screw
Yes
Open the valve
Replace capillary
Yes
Clean condenser /
Yes Clean or adjust the gap
btw IPM and heat sink
F7 disappear?
Yes
No
Low pressure normal?
（0.8-1.2Mpa）
No
No
Is the 2/3way valve
fully opened?
Yes
Yes
Capillary blocked?
No
Yes Condenser /
evaporator dirty?
No
evaporator
Yes
Yes
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