Westinghouse WHP09WMA21S Service Manual page 23

IPM module
protection
PFC protection
Compressor pre
heating process
Chip in outdoor
board in trouble
AC voltage higher
or lower
protection
DC compressor
start failure
Outdoor ambient
temperature too
low protection
Mark description: the lights flash every two seconds for the following faults
Protection against
overheated
outdoor radiator
Protection of the
system against too
high pressure
When the compressor is in operation:
Mark description: ★： Light ： Flash
LED1
No.
1
2
3
O
O
★
O O
★
O
★ ★
O
O O
★
O O
： Off; the flash cycle is 1S
Reasons for the current operating frequency
LED2 LED3
of the compressor is limited
Normal frequency rising and decreasing, no
limitation
Frequency decreasing or prohibition of
★
frequency rising caused by over-current
Frequency decreasing or prohibition of
★ ★
frequency rising caused by anti-freezing of
refrigeration or anti-oveload in heating
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a. The IPM board is failure;
b. The outdoor fan is broken;
c. The outdoor fan motor is failure;
d. The outdoor fan has been blocked ;
e. The condenser is dirty;
f. The outdoor unit has been installed without
standard.
a. The PFC is failure;
b. The outdoor drive board is failure
It is normal mode in cold weather
a. Using the wrong drive board;
b. Using the wrong compressor.
a. The supply voltage is higher or lower than
normal;
b. The inner supply voltage of the unit is higher or
lower than normal
a. The outdoor drive board is failure;
b. The compressor is failure
a. Outdoor ambient temperature too low
a. Radiator sensors fail
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 the system pressure
exceeds the limit