Hitachi RPIL-3.0UFE1NH Service Manual page 30

2. TROUBLESHOOTING
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 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 (4.0/5.0/6.0/6.5HP)
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. Compress or oil shortage serious
wear of crankshaft;
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 clamping;
3.The compressor insulation fails.
1. System overload or current
overload;
2. Driver board fails;
3. Compressor oil shortage,serious
wear of crankshaft;
4. The compressor insulation fault.
1.Communication wire is not connected
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 abnormal, power
frequency 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. Compressor oil shortage, serious
wear of crankshaft;
4. The compressor insulation fault.
1. System overload, current is too large;
2. Driver board fault;
3. Compressor oil shortage,serious
wear of crankshaft;
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
is 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;
28
How to deal with
1. Check compressor wire;
2. Change driver board;
3. Turn on the machine after the
pressure is balanced again;
4. Change Compressor;
5. Change the Compressor;
6. Change the Compressor.
1.Check compressor wire connection;
2.Change the driver board;
3. Change the Compressor.
Change driver board .
1.Change 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 compressor wire connection;
2. Change the driver board;
3. Change the control board.
1.Check power supply;
2.Change the driver board.
1. Check 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
connection;
4.Change the driver board.
1. Check the power supply;
2. Not fault;
3. Change the driver board.