Santerno Sinus M, User Manual

Page: 196 / 219

14-4

Fault remedy
Keypad
display
Cause Remedy
Over voltage
Decel time is too short compared to the
GD
2
of the load.
Regenerative load is connected at the
inverter output.
Line voltage is too high.

Increase the Decel time.

Use Dynamic Brake Unit.

Check whether line voltage exceeds
its rating.
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 capacity 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 I20-I24 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
No brake open current is flowing.

Check the Motor Capacity & Wiring.