Hitachi WJ Series User Manual page 388

Chapter 15
Error
Name
code
Power supply
E15.* overvoltage
error
Temperature
E19.*
detection error
Cooling fin
E21.* temperature
error
CPU
E22.* communication
error
Main circuit
E25.*
error
Analog current
E26.*
input error
E30.* Driver error
Thermistor
error *3 (Motor
E35.*
temperature
error)
*2. When these errors occur, the reset operation is not accepted. Turn off the power once. If the same error occurs
the next time the power is turned on, there is a possibility of failure. Please contact your supplier or local Hitachi
sales office.
*3. If thermistor is not connected, disconnection or failure while the [PTC] is assigned to the input terminal, E35 will
occur again even after resetting. In this case, connect a thermistor or short-circuit between [5]-[L] terminals before
turning on the power.
Description
When the overvoltage
condition of the power supply
voltage continues for 100
seconds while the inverter is
stopped, the inverter trips. The
overvoltage detection value of
the P-N voltage is approx. 390
VDC (200 V class) or 780 VDC
(400 V class).
When the cooling fin
temperature detection system
is judged to be abnormal such
as broken wire, the inverter
trips.
When the main circuit part
temperature exceeds the
specified value for reasons
such as high ambient
temperature, the inverter trips.
When a malfunction or
abnormality occurs in the
communication of the built-in
CPU, the inverter trips.
When a problem occurs in the
main circuit board, the inverter
trips.
When an excessive current
flows through the analog
current input terminal [Ai2],
the inverter trips.
When an instantaneous
overcurrent occurs, the
inverter trips to protect the
main element.
*2
(This trip does not allow retry
operation. The power must be
turned on again.)
When the thermistor input
[PTC] function is enabled and
an abnormal temperature is
detected by the resistance
value of the external
thermistor, the inverter trips.
15-2-4
Tips/FAQ/Troubleshooting
Possible causes and countermeasures
Is the power supply voltage too high?
→ Decrease the power supply
voltage.
→ Suppress power supply
fluctuations.
→ Insert an AC reactor into the
input.
Inverter failure.
→ Repair.
Is the inverter mounted vertically?
→ Check the installation.
Is the ambient temperature too high?
→ Lower the temperature.
Is the cooling fan not stopped?
→ Set "Cooling fan control method
selection [b092]" to "Always (00)".
→ Check the power supply of the
cooling fan.
Is the cooling fin clogged?
→ Clean the fin.
Is there a large noise source nearby?
→ Noise suppression.
Inverter failure.
→ Repair.
Is there a large noise source nearby?
→ Noise suppression.
Inverter failure.
→ Repair.
Is [Ai2] wiring short-circuited or
incorrect wiring?
→ Check the wiring.
Control circuit board failure.
→ Repair.
Is there an output short circuit?
→ Check the output line.
Is there a ground fault?
→ Check the output wires and
motor.
Is there any damage to the main
element?
→ Checking IGBT.
(See "16.2.4 Checking the
Inverter and Converter Section".)
Is the motor temperature too high?
→ Check the temperature.
Is there any damage to the
thermistor?
→ Check the thermistor.
Is there noise contamination to the
thermistor signal?
→ Wiring separation.
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4-1-1
9-10-6
9-11-6
16-2-2
1-3-3
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5-4-4
16-2-4
9-10-7