user manual

Haier air conditioner Edition: 20070116
-49-
F1: The protection of IPM
Electrify the machine again and turn it
on with the remote controller, then
measure temperature on the module
radiator and decide whether it is too
high.
With a multimeter, test whether there
is diode characteristic between the
three terminals U/V/W and whether
the two terminals P/N of IPM module
and the diode characteristic is exist.
IPM Module might be poorly
radiated and need to be recoated
with heat conducting paste and
reinstalled.
IPM Module is damaged and
needs replacing.
The compressor should be
damaged.
Yes
Yes
No
No
Test with a multimeter, and check
whether the resistance values among
Phases U, V and W of compressor are
equal and between 1 and 3O.
IPM Module is damaged and
needs replacing.
No
Yes