Shihlin electric SC3 Series User Manual

Appendix 2 Alarm code list
Appendix 197
7.2 Appendix 2 Alarm code list
Code
Keypad screen display
Cause
Troubleshooting
ERROR
1.Low input voltage.
2.The reset function “RES” is on.
3.Bad connection between the
external keypad and main body.
4.Internal circuit malfunction.
5. CPU error.
6. Abnormal insulation of load to
ground.
1.Use a better power supply.
2.Shut off “RES”.
3.Ensure the keypad is connected firmly.
4.Replace the inverter.
5.Restart the inverter.
6. Check the insulation of the motor cable
and the three-phase winding of the motor.
OC0
Over-current at
startup
The output current is two times
larger than the rated current of the
inverter or the output side is short.
1.Check whether the insulation layer of the
motor power line is damaged
2.Check whether a contactor is used in
series on the output side of the inverter,
the contactor’s contacts will arc and leads
to inverter detects overcurrent (please
avoid this usage, please refer to manual
for wiring details)
3.The control circuit of the inverter is
interfered with external noise (for
example: the electromagnetic contactor
frequently switches to power supply load),
it is recommended to add magnetic rings
on output line of the electromagnetic
contactor, and add magnetic ring with 2~3
windings on control terminal input signal
on inverter
4.If alarm OC0 when the motor is
disconnected, it needs to be sent to the
factory for inspection
OC1
Over-current
during
acceleration
1.It is recommended to increase the
acceleration time P.7 (01-06)
2.Check the insulation condition of the
motor power line (for example: the
insulation of the three-phase motor is
short to ground, the power line is
short-circuited, or short circuit between
power line and the metal part of the
electric cabinet)
3.Check whether the base frequency
parameter P.3 (01-03) of the inverter is
the same with the rated frequency of the
motor
OC2
Over-current at
constant speed
1.It is recommended to reduce the load to
eliminate motor stall and transmission
mechanism jam
2.Check the insulation condition of the
motor power line (for example: the
insulation of the three-phase motor is
short to ground, the power line is
short-circuited, or short circuit between
power line and the metal part of the
electric cabinet)
3.Check whether the selection of the
inverter power is too low

Shihlin electric SC3 Series Specifications

General

Brand	Shihlin electric
Model	SC3 Series
Category	Inverter
Language	English