Westinghouse WHM24DMA21S Service Manual page 37

Fault
Fault description
code
1 Inverter DC voltage overload fault 1. Power supply input is too high
2 Inverter DC low voltage fault
3 Inverter AC current overload fault
4 Out-of-step detection
Loss phase detection fault (speed
5
pulsation)
Loss phase detection fault (current
6
imbalance)
7 Inverter IPM fault (edge)
8 Inverter IPM fault (level)
9 PFC_IPM IPM fault (edge)
10 PFC_IPM IPM fault (level)
11 PFC power detection of failure
PFC overload current detection of
12
failure.
13 DC voltage detected abnormal .
PFC LOW voltage detected
14
failure.
AD offset abnormal detected
15
failure.
16 Inverter PWM logic set fault.
17 Inverter PWM initialization failure
18 PFC_PWM logic set fault.
19 PFC_PWM initialization fault.
20 Temperature abnormal.
Shunt resistance unbalance
21
adjustment fault
22 Communication failure.
23 Motor parameters setting of failure Initialization is abnormal.
26 DC voltage mutation error
27 D axis current control error
28 Q axis current control error
Saturation error of d axis current
29
control integral
Saturation error of q axis current
30
control integral
35 EE data abnormal
Table 2 Drive fault code (24K/36K)
Possible reasons for abnormality
or too low;
2. Driver board fault.
1. Compressor phase lost；
2. Bad driver board components；
3. The compressor insulation fault.
1. System overload or current
overload;
2. Driver board fault;
3. Compressor oil shortage,
serious wear of crankshaft ;
4. The compressor insulation fault.
1. The power supply is not stable;
2. Instantaneous power off;
3. Driver board failure.
1. System overload, current is
too high;
2. Driver board fails;
3. PFC fails.
1. Input voltage is too high or too
low;
2. Driver board fails.
Driver board fails.
1. Communication wire connection
is not proper;
2. Driver board fails;
3. Control board fails.
1. Power input changes suddenly
2. Driver board fails.
1. System overload, phase current
is too high;
2. Driver board fails.
1. System overloads, phase
current is too high；
2. Driver board fails.
1. System overload suddenly;
2. Compressor parameter is
not suitable;
3. Driver board fails.
1. System overload suddenly;
2. Compressor parameter is
not suitable;
3. Driver board fails.
Driver board EEPROM is abnormal
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How to deal with
1. Check power supply；
2. Change driver board.
1. Check compressor wire
connection;
2. Change the driver board;
3. Change compressor.
1. Check the system.
2. Change the driver board;
3. Change the compressor;
4. Change the compressor.
1. Check the power supply.
2. No need to deal with.
3. Change the driver board.
1.Check the system;
2.Change the driver board;
3.Change the PFC.
1. Check the power supply;
2. Change the driver board.
Change the driver board.
1. Check the wiring;
2. Change the driver board;
3. Change the control board.
Reset the power supply.
1.Check power supply, to provide
stable power supply;
2.Change driver board.
1. Check system to see if it works
normally.
2. Check stop valve to see if it is open;
3. Change the driver board.
1. Check system to see if it works
normally.
2. Check stop valve to see if it is open;
3. Change the driver board.
1. Check system to see if it works
normally.
2. Check stop valve to see if it is open;
3. Change the driver board.
1. Check system to see if it works
normally.
2. Check stop valve to see if it is open;
3. Change the driver board.
1. Change EEPROM；
2. Change the driver board.