Haier air conditioner
Edition: 10061116
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5 3
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F3: Communication fault between the IPM and outdoor PCB
1, Check whether Terminal CN
7
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
4
of
Terminal CN
7
is about
12
V 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
