LSIS SV-IS7 User Manual

Troubleshooting and Maintenance
148
Type
Problem
Solution
inverter output.
The input voltage is too high.
Check if the input voltage is above the
specified value.
The set value for electronic thermal
protection is too low.
Set an appropriate electronic thermal
level.
The inverter has been operated at a
low speed for an extended period.
Replace the motor with a model that
supplies extra power to the cooling fan.
Low Voltage
/Low
Voltage2
The input voltage is too low.
Check if the input voltage is below the
specified value.
A load greater than the power
capacity is connected to the system
(e.g. a welder, direct motor
connection, etc.)
Increase the power capacity.
The magnetic contactor connected to
the power source has a faulty
connection.
Replace the magnetic contactor.
Ground Trip
A ground fault has occurred in the
inverter output wiring.
Check the output wiring.
The motor insulation is damaged.
Replace the motor.
E-Thermal
The motor has overheated.
Reduce the load or operation frequency.
The inverter load is greater than the
rated capacity.
Replace the inverter with a model that has
increased capacity.
Out Phase
Open
The magnetic contactor on the output
side has a connection fault.
Check the magnetic contactor on the
output side.
The output wiring is faulty.
Check the output wiring.
In Phase
Open
The magnetic contactor on the input
side has a connection fault.
Check the magnetic contactor on the input
side.
The input wiring is faulty.
Check the input wiring.
The DC link capacitor needs to be
replaced.
Replace the DC link capacitor. Contact the
retailer or the LSIS Customer Support.
Inverter OLT
The load is greater than the rated
motor capacity.
Replace the motor and inverter with
models that have increased capacity.
The torque boost level is too high.
Reduce the torque boost level.

LSIS SV-IS7 Specifications

General

Brand	LSIS
Model	SV-IS7
Category	Inverter
Language	English