Westinghouse WHU09DHA21S Service Manual page 45

Fault
Fault description
code
Q axis current
1 detection, failure in
drive control
Phase current detection,
2
failure in drive control
Initialization, phase
3
current imbalance
Speed estimation,
4
failure in drive control
5 IPM FO output fault
Communication
6 between driver board
and control board fault
AC voltage,overload
7
voltage
DC voltage,overload
8
voltage
9 AC voltage imbalance
The PFC current
detection circuit fault
10
before compressor is
ON
AC voltage supply in
11
outrange
Products of
single-phase PFC
over-current, FO
output at low level
12
Inverter over current
(3-phase power supply
air conditioners)
13 Inverter over current
PFC over
current(single phase
air-conditioner)
Phase imbalance or
14
phase lacks or the
instantaneous power
failure (only for
3-phase power supply
air conditioners)
The instantaneous
15
power off detection
Table 4 Drive Fault Code (24K/36K)
Possible reasons for abnormality
1. Compressor wire is not connected
properly;
2. Bad driver board components;
3. Compressor start load is too large;
4. Compressor demagnetization;
5. The compressor is short of oil, and
the crankshaft is worn seriously;
6. The compressor insulation fails.
1.Compressor voltage default phase;
2.Bad driver board components;
3.The compressor insulation fault.
Bad driver board components.
1.Bad driver board components;
2.Compressor shaft is clamped;
3.The compressor insulation fails.
1. System overload or current
overloads.
2. Driver board fails;
3. The compressor is short of oil, and
the crankshaft is worn seriously;
4. The compressor insulation fault.
1.Communication wire connection
is not well;
2.Driver board fault;
3.Control board fault.
1. Supply voltage input is too high or
too low;
2. Driver board fails;
1. Supply voltage input is too high ;
2. Driver board fault;
Driver board fails;
Bad driver board components.
1.Power supply is abnormal, power
frequency is out of range;
2.Driver board fails;
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1. System overload, current is too large;
2. Driver board fault;
3. The compressor is short of oil, and
the crankshaft is worn seriously;
4. The compressor insulation fault.
1. System overload, current is too large;
2. Driver board fault;
3. The compressor is short of oil, and
the crankshaft is worn seriously;
4. The compressor insulation fault.
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1.3-Phase voltage imbalance;
2.The 3-phase power supply phase
lost;
3.Power supply wiring is wrong;
4.Driver board fault.
1.The power supply is not stable ;
2.The instantaneous power failure ;
3.Driver board fault.
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How to deal with
1. Check the compressor wire;
2. Change the driver board ;
3. Turn on the unit after the
pressure is balanced again;
4. Change the compressor;
5. Change the compressor;
6. Change the compressor.
1.Check the compressor wire connection;
2.Change the driver board;
3.Change the Compressor.
Change the driver board .
1.Change the driver board ;
2.Change the Compressor ;
3.Change the Compressor .
1.Check the air conditioner system;
2.Change the driver board;
3.Change the Compressor;
4.Change the Compressor.
1. Check the compressor wire connect.
2. Change the driver board;
3. Change the control board ;
1.Check the power supply;
2.Change the driver board;
1. Check the power supply;
2. Change the driver board;
Change the driver board;
Change the driver board.
1. Check the system;
2. Change the driver board;
1. Check the system;
2. Change the driver board;
3. Change PFC.
1. Check the system;
2. Change the driver board;
3. Change the Compressor;
4. Change the Compressor.
1. Check the system;
2. Change the driver board;
3. Change the Compressor;
4. Change the Compressor.
1. Check the system;
2. Change the driver board;
3. Change PFC.
1, Check the power supply;
2. Check the power supply;
3. Check the power supply wiring connect;
4.Change the driver board.
1. Check the power supply;
2. Not fault;
3. Change the driver board.