Hitachi SJ700 Series - Chapter 5 - Troubleshooting; Error Code Interpretation; Troubleshooting Guide

Chapter 5
Page 20 of 46
Chapter 5 – Troubleshooting
In general, the first step to troubleshooting should be to inspect the status LEDs on the SJ-EN board, in addition
to the inverter operator/keypad display. These will give valuable clues to the nature of the problem.
In addition, the inverter operator/keypad will provide diagnostic information for certain types of errors. Error
codes for the option boards will have the format of:
 for a board installed in option slot 1, or  for a board installed in option slot 2. The number
to the right of the decimal point indicates the drive status at the time of trip, as follows:

At reset

At stop

During
deceleration

At constant
speed

During
acceleration

f0 Stop

At starting

During DC
injection
braking

During overload
restriction
The digit immediately to the left of the decimal point has the following meaning:
Code
Trip Name
Cause
Check
Remedy

Ethernet Communication
Error
Defective
connection
Connectors (plugs
& jacks), cable
Replace or repair;
press STOP/RESET
on inverter keypad
PC not powered up
or not connected to
inverter
That PC is powered
on and connected
Press STOP/RESET
on inverter keypad
Network
configuration error
Verify proper
Ethernet setup of
SJ-EN and master
device
Reconfigure
incorrect settings.

Internal Communication
Error (between SJ-EN and
inverter)
Option board ajar or
loose
Verify board is
properly seated in
connector
Remove and reseat
board
Board lockup
Check status LEDs
Press STOP/RESET
key on inverter or
cycle power
Board defective
Check status LEDs
Replace SJ-EN

Inverter Mismatch
(blinking display as
shown)
Inverter firmware
version not
compatible with
SJ-EN option board
Inverter
Manufacturing
Number for version
(see Page 7)
Replace Inverter
with later version