10-27
10.6 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.
To ensure stable and safe inverter operation it is recommended to perform routine inverter maintenance at
regular intervals. Use the checklist below as a guideline for inspection. Make sure to turn power off and wait for a
minimum of 5 minutes or until the charge indicator extinguishes before inspecting the inverter to avoid electric
shock hazard from the charged capacitors.
1. Maintenance Check List
Ensure that temperature and humidity where the inverter is installed falls within the specification make sure
correct ventilation is provided.
For replacement of a failed or damaged inverter consult factory.
Ensure that the installation area is free from dust and any other debris.
Check and ensure that the ground connections are secure and correct.
Terminal screws cannot be loose, tighten terminal for power input and output of the inverter with power
turned off.
Do not perform any insulation test on the control circuit.
2
．
Insulation test (megger test)
Single P has e Three Ph ase
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
