LS SV-iG5H Series, Manual, Page: 207 / 226

Troubleshooting & Maintenance
193
Tro
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-
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Keypad display Cause Remedy
Low voltage
Line voltage is low.
Load larger than line capacity is
connected to line (ex: welding machine,
motor with high starting current
connected to the commercial line).
Faulty magnetic switch at the input side
of the inverter. Check whether line voltage is

below its rating.
Check the incoming AC line.

Adjust the line capacity
corresponding to the load.
Change a magnetic switch.

Electronic
thermal
Motor has overheated.
Load is greater than inverter rating.
ETH level is set too low.
Inverter capacity is incorrectly selected.
Inverter has been operated at low
speed for too long. Reduce load weight and

operating duty.
Change inverter with higher

capacity.
Adjust ETH level to an

appropriate level.
Select correct inverter capacity.

Install a cooling fan with a

separate power supply.
External fault A
contact input
The terminal set to
“18 (External fault-
A)
” or “19 (External fault-B)” in I17-I20
in I/O group is ON.
Eliminate the cause of fault at

circuit connected to external fault
terminal or cause of external
fault input.
External fault B
contact input
Operating
method when
the frequency
command is
lost
No frequency command is applied to
V1 and I. Check the wiring of V1 and I and

frequency reference level.
Remote
keypad
communication
error
Communication error between inverter
keypad and remote keypad
Check for connection of

communication line and
connector.
Brake control
error
Break open current is not flow any
more. Check the Motor Capacity &

Wiring