LSIS SV-iS7 series User Manual

Chapter 7 Checking and Troubleshooting
G
7-6
Type Cause of Trouble Solution
 The braking of the motor is too
fast.
search (CON-60).
ත Check the machine brake.
Over Voltage
 Decelerating time is too short
compared with the inertia of the
load (GD
2
).
 Regenerative load is located at
the inverter output.
 The supply voltage is too high.
ත
Set the decelerating time higher.
ත Use a braking resistance device.
ත Check whether the supply
voltage is above the prescribed
degree.
Low Voltage/
Low
Volatage2
 The supply voltage is too low.
 Load larger than the power
supply capacity is connected(a
welder or motor direct on line).
 Nonconformity of the electronic
contactor, etc. on the power
supply side.
ත
Check whether the supply
voltage is below the prescribed
degree.
ත Raise the power supply capacity.
ත Replace the electronic contactor.
Ground Trip
 Earth of the outlet cord of the
inverter.
 Deterioration of the insulation of
the motor.
ත
Check the output terminal
distribution of the inverter.
ත Replace the motor.
E-Thermal
 The motor is overheated.
 The load of the inverter is bigger
than its rated load.
 The electronic thermal level is set
too low.
 The inverter has operated for a
long time at a low speed.
ත
Reduce the load or frequency.
ත Raise the capacity of the inverter.
ත Set the electronic thermal level
properly.
ත Replace the motor for one that
can separately supply power to
the cooling fan.
Out Phase
Open
 Contact trouble of the electronic
contactor of the output side.
 Bad distribution of output
ත
Check the electronic contactor of
the output side of the inverter.
ත Check the output distribution.
In Phase
Open
 Contact trouble of the electronic
contactor of the input side
 Bad distribution of input
 The DC condenser of the inverter
needs replacing.
ත
Check the electronic contactor of
the input side of the inverter.
ත Check the input distribution.
ත You should replace the DC
condenser of the inverter. Get
customer service from an
agency.
Inverter OLT
 The load of the inverter is bigger
than it’s the inverter rating.
 Torque boost is too high.
ත
Raise the capacity of the inverter
and motor.
ත Reduce the torque boost

LSIS SV-iS7 series Specifications

General

Brand	LSIS
Model	SV-iS7 series
Category	Inverter
Language	English