Haier air conditioner | Edition: 10061116 |
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
No
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
Yes
Yes
1, Pull out and reinsert the terminals.
2, Replace connected wire
Replace the outdoor IPM module with a new one.
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