Chapter 5 - Troubleshooting - Hitachi SJ700 Series Instruction Manual

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