Hitachi RCI-3.0UFE1NH, Service Manual

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2
. TROUBLESHOOTING
Table 4 Drive Fault Code (4.0/5.0/6.0/6.5HP)
Fault
code
Fault description
Possible reason s for abnormality
How to deal with
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. Compress or oil shortage serious
wear of crankshaft;
6. The compressor insulation fails.
1. Check compressor wire;
2. Change driver board;
3. Turn on the machine after the
pressure is balance d again;
4. Change 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 compressor wire connection;
2.Change the driver board;
3. Change the Compressor.
3
Initialization, phase
current imbalance
Bad driver board components. Change driver board .
4
Speed estimation,
failure in drive control
1. Bad driver board components;
2. Compressor shaft clamping;
3. The compressor insulation fa ils .
1.Change driver board;
2.Change the Compressor;
3.Change the Compressor.
5 IPM FO output fault
1. System overload or current
overload ;
2. Driver board fa ils ;
3. Compressor oil shortage,serious
wear of crankshaft;
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 is not connect ed
well;
2. Driver board fault;
3. Control board fault .
1. Check compressor wire connect ion;
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 fa ils .
1.Check 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 power supply;
2. Change the driver board;
9 AC voltage imbalance Driver board fa ils . 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 abnormal, power
frequency out of range;
2. Driver board fa ils .
1. Check the system;
2. Change the driver board
.
12
Products of
single-phase PFC
over-current, FO
output 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. Compressor oil shortage, serious
wear of crankshaft;
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. Compressor oil shortage,serious
wear of crankshaft;
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
is 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
ion
;
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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