LS SV-iG5H Series, Руководство пользователя, Страница: 206 / 226

192
Troubleshooting & Maintenance
Keypad display Cause Remedy
Inverter
overheat
Cooling system has faults.
An old cooling fan is not replaced with a
new one.
Ambient temperature is too high.
Check for alien substances

clogged in the heat sink.
Replace the old cooling fan with

a new one.
Keep ambient temperature

under 50

C.
Output Phase
loss
Faulty contact of magnetic switch at
output
Faulty output wiring
Make connection of magnetic

switch at output of the inverter
securely.
Check output wiring.

Cooling fan
fault
An alien substance is clogged in a
ventilating slot.
Inverter has been in use without
changing a cooling fan.
Check the ventilating slot and

remove the clogged substances.
Replace the cooling fan.

Over Pressure
When the PID feedback exceeds the
over pressure level trip occurs.
Reduce PID Feedback value.

Pipe Broken
This function detects the water pipe
breaks during the PID loop operation.
when the PID feedback doesn't reach
the set value within the setting time
during the maximum output operations,
trip occurs.
Check the pipe for leaks.

Broken Belt
This built-in feature in the inverter
detects the breakage of the belt or
coupling in the fan or pump system.
Check your belt for breaks.

Under Load
Protection
As some process malfunctions may
cause the motor load to drop below the
normal operating range, the underload
trip is generated.
Adjust the Under Level.

Over voltage
Decel time is too short compared to the
GD² of the load.
Regenerative load is at the inverter
output.
Line voltage is too high. Increase the Decel time.

Use Dynamic Brake Unit.

Check whether line voltage

exceeds its rating.