Hitachi WJ C1 Series User Manual

Chapter 15 Tips/FAQ/Troubleshooting
15-2-5
Error
code
Name
Description
Possible causes and countermeasures
Page
E36.*
Brake error
When "Brake control enable
[b120]" is enabled and
ON/OFF of the brake cannot
be confirmed within the "Brake
confirmation signal wait time
[b124]" after the inverter has
output a brake releasing signal,
the inverter trips.
Is ON/OFF operation of the braking
normal?
→ Check the brake.
Is the setting of [b124] too short?
→ Increase the [b124].
Is the "Answer back from Brake [BOK]"
signal turned on?
→ Check wiring.
9-7-16
E37.*
STO shut-off
error
When "STO input operation
selection [b145]" is set to
"[E37] trip (01)" and either of
the [ST1]/[ST2] input terminals
is off, the inverter trips.
Is [ST1]/[ST2] incorrectly input?
→ Check the wiring and sequence of
[ST1]/[ST2] input signals.
Is parameter setting correct?
→ Check the [b145] setting.
14-1-1
E38.*
Low-speed
range overload
error
When an overload occurs in
the extremely low speed range
of 0.2 Hz or less, the built-in
electronic thermal will detect
and the inverter trips.
(However, high frequency may
remain in the error history in
some cases.)
When "Electronic thermal
decrease function enable
[b910]" ≠ 00, this error also
occurs as overload protection
of the inverter.
Is the load too heavy?
→ Lower the load factor.
8-1-8
E40.*
Remote
operator
communication
error
When communication with the
optional external remote
operator is abnormal or
disconnected, the inverter
trips. Enable/disable of error
detection can be selected in
"Operation selection at
operator disconnection
[b165]".
Is there a communication error?
→ Check/replace the cable.
7-2-11
E41.*
Modbus
communication
error
When RS485 communication
timeout occurs, the inverter
trips. Enable/disable of error
detection can be selected in
"RS485 communication error
selection [C076]".
Is the settings of communication
baud rate etc. correct?
→ Check the settings.
Are the length and shield of the
wirings appropriate? Also, are wires
not broken?
→ Check the communication wiring.
Is the termination resistor setting
correct?
→ Check the termination resistor.
11-1-1
11-1-3
E43.*
EzSQ invalid
instruction
error
When an invalid instruction is
detected in EzSQ program, the
inverter trips.
(EzSQ was executed without
downloading the program to
the inverter, EzSQ program
memory was broken, etc.)
For more information, refer to
"Inverter configuration software
ProDriveNext instruction manual
(NT8001*X)" and "Easy-Sequence
Function (EzSQ) Programming Guide
(NT2021*X)".
12-2-1
E44.*
EzSQ nesting
count error
When the nesting count
exceeds the allowable
executed number in EzSQ
program, the inverter trips.
E45.*
EzSQ execution
error
When an instruction that
cannot be executed is
detected in EzSQ program, the
inverter trips.
E50.*
to
E59.*
EzSQ
user-assigned
error 0 to 9
When the corresponding user-
assigned tripping programs are
executed in EzSQ program, the
inverter trips.

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English