2
.
TROUBLESHOOTING
Table 4 Analysis of the driving board fault
[
3.0HP/4.0HP
(24K/36K)]
Fault
code
Fault description
Possible reasons for
abnormality
How to deal with
1
Q axis current
detection, failure in
drive control
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. 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.
2
Phase current detection,
failure in drive control
1.Compressor voltage default phase;
2.Bad driver board components;
3.The compressor insulation fault.
1.Check the compressor wire connection;
2.Change the driver board;
3.Change the
c
ompressor.
3
Initialization, phase
current imbalance
Bad driver board components.
Change the driver board .
4
Speed estimation,
failure in drive control
1.Bad driver board components;
2.Compressor shaft is clamped;
3.The compressor insulation fails.
1.Change the driver board ;
2.Change the
c
ompressor ;
3.Change the
c
ompressor .
5
IPM FO output fault
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.Check the air conditioner system;
2.Change the driver board;
3.Change the
c
ompressor;
4.Change the
c
ompressor.
6
Communication
between driver board
and control board fault
1.Communication wire connection
is not well;
2.Driver board fault;
3.Control board fault.
1. Check the compressor wire connect.
2. Change the driver board;
3. Change the control board ;
7
AC voltage,overload
voltage
1. Supply voltage input is too high or
too low;
2. Driver board fails;
1.Check the power supply;
2.Change the driver board;
8
DC voltage,overload
voltage
1. Supply voltage input is too high ;
2. Driver board fault;
1. Check the power supply;
2. Change the driver board;
9
AC voltage imbalance
Driver board fails;
Change the driver board;
10
The PFC current
detection circuit fault
before compressor is
ON
Bad driver board components.
Change the driver board.
11
AC voltage supply in
outrange
1.Power supply is abnormal, power
frequency is out of range;
2.Driver board fails;
1. Check the system;
2. Change the driver board;
12
Products of
single-phase 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. Change the driver board;
3. Change 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 compressor insulation fault.
1. Check the system;
2. Change the driver board;
3. Change the
c
ompressor;
4. Change the
c
ompressor.
13
Inverter over current
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. Check the system;
2. Change the driver board;
3. Change the
c
ompressor;
4. Change the
c
ompressor.
14
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. Change the driver board;
3. Change PFC.
Phase imbalance or
phase lacks or the
instantaneous power
failure (only for
3-phase power supply
air conditioners)
1.3-Phase voltage imbalance;
2.The 3-phase power supply phase
lost;
3.Power supply wiring is wrong;
4.Driver board fault.
1, Check the power supply;
2. Check the power supply;
3. Check the power supply wiring connect;
4.Change the driver board.
15
The instantaneous
power off detection
1.The power supply is not stable ;
2.The instantaneous power failure ;
3.Driver board fault.
1. Check the power supply;
2. Not fault;
3. Change the driver board.
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