Service and Parts Manual (2019, 2020, 2021, 2022)

111 PB
TROUBLESHOOTING
Drive Fault Code (24K/36K)
1
Q axis current
detection , failure in
drive control
1. C ompressor wire is not connect ed
properly;
2. Bad driver board components;
3. Compressor start load is too large;
4. Compressor demagnetization;
5. The c ompressor is short of oil, and
the crankshaft is worn seriously ;
6. The compressor insulation fails.
2
Phase current detection ,
failure in drive control
1. Check the compressor wire;
2. Change the driver board ;
3. Turn on the unit after the
pressure is balance d again;
4. Change the compressor;
5. Change the compressor;
6. Change the compressor.
1.Compress or voltage defau lt phase;
2.Bad driver board components;
3.The compress or insulation fault.
3
1.Check the compre ssor wire connection;
2.Cha nge the driver board;
3.Cha nge the Compressor.
Initialization, phase
current imbalance
Bad driver board components.
Chan ge the driver board .
4
Spee d estimation,
failure in drive control
1.Bad driver board components;
2.Compress or shaft is clamp ed;
3.The compress or insulation fa ils.
5 IPM FO output fault
1.Cha nge the driver board ;
2.Cha nge the Compress or ;
3.Cha nge the Compress or .
1. System overload or current
overload s.
2. Driver board fails;
3. The compressor is short of oil, and
the crankshaft is worn seriously;
4. The compress or insulation fault.
6
1.Check the air condition er system;
2.Cha nge the driver board;
3.Cha nge the Compressor;
4.Chan ge the Compressor.
Communication
between driver board
and control board fault
1.Communication wire connect ion
is not well;
2.Driver board fault;
3.Contro l board fault.
7
1. Check the compre ssor wire connect.
2. Cha nge the driver board;
3. Cha nge the control board ;
AC voltage,overload
voltage
1. Supp ly voltage input is too high or
too low;
2. Driver board fails;
8
1.Check the power supply;
2.Cha nge the driver board;
DC voltage,overload
voltage
1. Supp ly voltage input is too high ;
2. Driver board fault;
9
1. Check the power supply;
2. Cha nge the driver board;
AC voltage imbalance Driver board fails; Change the driver board;
10
Bad driver boa rd components .
The PFC current
detection circuit fault
before compressor is
ON
Chan ge the driver board .
11
AC voltage supply in
outrange
1.Power supply is abnorma l, power
freque ncy is out of range;
2.Driver board fails;
1. Check the system;
2. Cha nge the driver board;
12
Products of
single-p hase PFC
over-current, FO
output at low level
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1. Check the system;
2. Cha nge the driver board;
3. Cha nge PFC.
Inverter over current
(3-phase power supply
air conditioners)
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 compress or insulation fault.
13 Inverter over current
1. Check the system;
2. Cha nge the driver board;
3. Cha nge the Compressor;
4. Cha nge the Compressor.
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 compress or insulation fault.
14
1. Check the system;
2. Cha nge the driver board;
3. Cha nge the Compressor;
4. Cha nge the Compressor.
PFC over
current(single phase
air-conditioner)
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1. Check the system;
2. Cha nge the driver board;
3. Cha nge PFC.
1.3-Phase voltage imbalance;
Phase imbalance or
phase lacks or the
instantaneous power
failure (only for
3-phase power supply
air conditioners)
1, Check the power supply;
2.The 3-phase power supply phase
lost;
3.Power supply wiring is wrong;
4.Driver board fault.
15
2. Check the power supply;
3. Check the power supply wiring connect;
4.Cha nge the driver board.
The instantaneous
power off detection
1.The power supply is not stable ;
2.The instantaneo us power failure ;
3.Driver board fault.
1. Check the pow er supply;
2. Not fault;
3. Cha nge the driver board.