Hitachi WJ C1 Series User Manual

Chapter 15 Tips/FAQ/Troubleshooting
15-2-3
Error
code
Name
Description
Possible causes and countermeasures
Page
E09.*
Undervoltage
error
When the power supply
voltage drops, the control
circuit will not function
properly. Therefore, when the
power supply voltage falls
below approx. 172.5 VDC (200
V class/345 VDC (400 VDC),
the output will be shut off
(during undervoltage wait).
After that, when the power
supply is restored, the inverter
trips. The timing of the trip
depends on the "Restart mode
selection after instantaneous
power failure/undervoltage
error [b001]" and
"Instantaneous power
failure/undervoltage allowable
time [b002]" settings. In
addition, if undervoltage wait
time becomes more than 40
seconds, the inverter trips
without waiting for power
supply restoration.
Power supply voltage is not dropped?
→ Check the power supply.
Is the power supply capacity
insufficient?
→ Check the power supply.
Is there any aging degradation of the
smoothing capacitor?
→ See "16.2.5 Smoothing Capacitor
Life Curve"
16-2-5
E10.*
Current
detector error
When the built-in current
detector has problems, the
inverter trips.
Inverter failure.
→ Repair.
-
E11.*
CPU error
*2
When a malfunction or
problem occurs in the built-in
CPU, the inverter trips. In
addition, when an abnormal
value is read from the internal
memory, a CPU error may
occur.
Is there a large noise source nearby?
→ Noise suppression.
Inverter failure.
→ Repair.
1-3-3
E12.*
External trip
error
When the input terminal to
which "External fault [EXT]" is
assigned turns on, the inverter
trips.
Is input signal normal?
→ Check the external input device
and wiring.
Is there a large noise source nearby?
→ Noise suppression.
9-10-3
E13.*
USP error
When the power supply is
turned on while the RUN
command is being given to the
inverter, the inverter trips.
(Only when USP function is
selected)
Is the power supply turned on with
the RUN command input?
→ Check the operation signal.
9-10-4
E14.*
Ground fault
*2
When the power is turned on
and the ground fault between
the output section of the
inverter and the motor is
detected, the inverter trips.
(This function does not
operate if residual voltage
remains in the motor.)
Enable/disable of error
detection can be selected in
"Detect ground fault selection
[b098]".
Is there a ground fault?
→ Check the output wires and
motor.
Is there any abnormality in the
inverter alone?
→ Disconnect and check the output
wires.
Is there any abnormality in the main
circuit part?
→ Check the main circuit. (Refer to
"16.2 Daily Inspection and
Periodic Inspection".)
16-1-1
*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.

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English