5-14
Peripheral device
Rheostat
Whether rheostat wiring
or connector are
damaged
◎
Visual check
No
abnormalities
Replacement
rheostat
Electromagnetic
Contactor
Check contacts and
connections for any
abnormality.
◎
Replacement
Contactor
Unusual vibration and
noise
◎
hearing check
Reactor
Is there any
abnormalities?
◎
Visual check
Replacement
Reactor
Cooling System
Cooling fan
Unusual vibration and
noise
◎
Visual or
hearing check
Correct
cooling
Consult with
the supplier
Excessive dust or
debris
◎
Visual check
Clean the fan
Heat sink
Excessive dust or
debris
◎
Clean up
debris or dust
Ventilation Path
Is the ventilation path
blocked?
◎
Clear the
path
5.5 Maintenance
To ensure long-term reliability, follow the instructions below to perform regular inspection. Turn the power off
and wait for a minimum of 5 minutes before inspection to avoid potential shock hazard from the charge
stored in high-capacity capacitors.
1. Maintenance Check List
Ensure that temperature and humidity around the inverters is as required in the instruction
manual, installed away from any sources of heat and the correct ventilation is provided..
For replacement of a failed or damaged inverter consult with the local supplier.
Ensure that the installation area is free from dust and any other contamination.
Check and ensure that the ground connections are secure and correct.
Terminal screws must be tight, especially on the power input and output of the inverter.
Do not perform any insulation test on the control circuit.
2．Insulation test Method
Single Phase Three Phase
Inverter
L1（L）
L3（N）
T1
T2
T3
Dielectric
Withstand
Voltage Test
Power
Source
Motor
L2
Inverter
L1（L）
L3（N）
T1
T2
T3
Dielectric
Withstand
Voltage Test
Power
Source
Motor
L2
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