LSIS sv-ip5a User Manual

Chapter 7 - Troubleshooting & Maintenance
7-3
7.2 Fault Remedy
Protective
Function
Cause Remedy
Over Current
Protection 1
Acceleration/Deceleration time is too short compared
to the GD
²of the load.
Load is larger than the inverter rating.
Inverter turns output on when the motor is free
running.
Output short or ground fault has occurred.
5) Mechanical brake of the motor is operating too
fast.
6) Components of the main circuit have overheated
due to a faulty cooling fan.
1) Increase Accel/Decel time.
2) Increase inverter capacity.
3) Operate after motor has stopped.
4) Check output wiring.
5) Check mechanical brake operation.
6) Check cooling fan.
(Caution) Operating inverter prior to correcting
fault may damage the IGBT.
Ground Fault
Current
Protection
Ground fault has occurred at the output wiring o
f
inverter.
The insulation of the motor is damaged due to heat.
Investigate the output wiring of inverter.
Exchange motor.
Over Voltage
Protection
o
mpared to the GD²of load.
Regenerative load at the output
Line voltage high
Increase deceleration time.
Use regenerative resistor option.
Check line voltage.
Current Limit
Protection
(Overload
Protection)
Load is larger than the inverter rating.
Incorrect inverter capacity selected.
Set incorrect V/F pattern.
Increase capacity of motor and inverter.
Select correct inverter capacity.
Select correct V/F pattern.
Inverter
Overheat
Cooling fan damaged or an alien substance inserted.
Cooling system has faults.
Ambient temperature high.
Exchange cooling fans and/or eliminate alien
substance.
Check for alien substances in the heat sink.
Keep ambient temperature under 40
℃.
Electronic
Thermal
Motor has overheated.
Load is larger than inverter rating.
ETH level too low.
Incorrect inverter capacity selected.
Set incorrect V/F pattern.
Operated too long at low speeds.
Reduce load and/or running duty.
Increase inverter capacity.
Adjust ETH level to an appropriate level.
Select correct inverter capacity.
Select correct V/F pattern.
Install a cooling fan with a separate power supply.
External Trip External Trip has occurred.
Eliminate Trip at circuit connected to external trip
terminal or remove external trip input.
Low Voltage
Protection
Line voltage low.
Load larger than line capacity is connected to line.
(welding machine, motor with high starting current
connected to the commercial line)
Faulty magnetic switch at the input side of the
inverter
Check line voltage.
Increase line capacity.
Exchange magnetic switch.
Over Current 2
Short has occurred between the upper and lower
IGBT.
Short has occurred at the output of the inverter.
Acceleration/Deceleration time is too short compared
to the GD
²of load.
Check IGBT.
Check output wiring of inverter.
Increase acceleration time.
Output Phase
Open
Faulty contact of magnetic switch at output
Faulty output wiring
Check magnetic switch at output of inverter.
Check output wiring.
H/W Fault
Wdog error (CPU fault)
EEP error (memory fault)
ADC Offset (current feedback circuit fault)
Exchange inverter.
Communication
Fault
Faulty connection between inverter and keypad
Inverter CPU malfunction
Check connector.
Exchange inverter.

LSIS sv-ip5a Specifications

General

Brand	LSIS
Model	sv-ip5a
Category	Controller
Language	English