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Haier air conditioner Edition: 10061116
- 53-
F3: Communication fault between the IPM and outdoor PCB
1, Check whether Terminal CN7
on the outdoor mainboard, CN10
on IPM module are well inserted.
2, Check whether the connected wire
between IPM and outdoor is well
Electrify the machine again and turn it on,
check whether the voltage between 1 and 4of
Terminal CN7 is about 12V DC
No
Replace the outdoor
mainboard with a new one
Replace the outdoor IPM
module with a new one.
No
1, Pull out and reinsert the
terminals.
2, Replace connected wire
Yes
Yes