LS ELECTRIC SV-iS7 Series, User Manual

Page: 411 / 491

Troubleshooting and Maintenance
394
Type Problem Solution
The DC link capacitor needs to be
replaced.
Replace the DC link capacitor. Contact the
retailer or the LS ELECTRIC 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.
Over Heat
There is a problem with the cooling
system. Check if a foreign object is obstructing the
air inlet, outlet, or vent.
The inverter cooling fan has been
operating for an extended period.
Replace the cooling fan.
The ambient temperature is too high.
Keep the ambient temperature below
50
℃
.
Over
Current2
The output wiring has short-circuited. Check the output wiring.
There is a fault with the electronic
semiconductor (IGBT).
Do not operate the inverter. Contact the
retailer or the LS ELECTRIC Customer
Support.
NTC Open
The ambient temperature is too low.
Keep the ambient temperature above
10
℃
.
There is a fault with the internal
temperature sensor. Contact the retailer or the LS ELECTRIC
Customer Support.
FAN Trip
There is a foreign object in the inverter
vent where the fan is located. Remove the foreign object from the air
inlet or outlet.
The cooling fan needs to be replaced. Replace the cooling fan.
IP54 FAN
Trip
The fan connector is not connected. Connect the fan connector.
The power connector for the internal
fan PCB board is not connected. Connect the power connector for the
internal fan PCB board.
The cooling fan needs to be replaced. Replace the cooling fan.
No Motor
Trip
The motor is not connected to the
inverter output.
Check the wiring connections.
The current level for trip detection is
not set properly. Check the values of both BAS-13 (Rated
current) and PRT-32 (No Motor Level).