Westinghouse WHZ09WMA21S Service Manual page 23

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PFC protection
DC compressor
start failure
Compressor
drive in trouble
Outdoor fan
motor locked
rotor protection
Outdoor coil
anti-overload
protection with
cooling
Compressor
pre heating
process
Chip in outdoor
board in trouble
Overheated
outdoor radiator
Protection
against too high
system
pressure
- 22 -
d. The refrigerant system is
abnormal.
a. The PFC is failure;
b. The outdoor drive board
is failure
a. The outdoor drive board
is failure;
b. The compressor is failure
a. The outdoor drive board is
failure;
b. The compressor is failure
c. The outdoor control board
is failure
a. The connection of the
outdoor fan motor is loose;
b. There are something block
the outdoor fan;
c. The fan motor is failure;
d. The outdoor control board
is failure
a. The refrigerant is too much;
b. The outdoor fan motor is
failure;
c. The outdoor fan is broken;
d. The condenser is dirty;
e. The air inlet and air outlet of
the indoor unit and the
outdoor unit is not normally
It is normal mode in
cold weather
a. Using the wrong drive board;
b. Using the wrong compressor.
a. Radiator sensor fails
b. Detection circuit of the
sensor on the control panel
fails
a. The pressure switch
fails
b. The pressure detection
switch on the control panel
fails
c. The measured value of
system pressure exceeds
the limit