Chapter 8 Troubleshooting & Maintenances
8-10
8.5.2 Regular check
1) Check whether bolts and nuts are looses or corroded.
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Please, fasten or change bolts and nuts since they could be looses or get rusty in
environment with excessive vibrations.
2) Check whether cooling plate inside the inverter are covered with foreign substances or not.
☞
Please, remove those foreign substances.
3) Check whether PCB of the inverter is covered with foreign substances or not.
☞
Please, remove those foreign substances.
4) Check several connections of inverter’s PCB are correct or not.
☞
Please, check the status of connector.
8.5.3 Meger test
1) When doing Megar test on external circuit, please be careful not to put test voltage into inner
part of inverter after loosening all wiring of the inverter.
2) When doing transmission test on control circuit, please do not use Megar buzzer.
3) Megar test of the inverter is available only for main circuit terminals (R, S, T, U, V, W), but
unavailable for control circuit.
8.6 Exchange main components and maintenance
Name
Stand life
Status
How to exchange and manage
Cooling fan
2 ~ 3 years
Rotation
fault
Contact A/S center and exchange for new one
Main circuit
electrolytic
condenser
3 years
Capacity
decreased
Contact A/S center and exchange for new one
Relay of control
board
-
Operation
fault
Contact A/S center
Braking resister
-
Capacity
decreased
Contact A/S center and exchange for new one
Since life span for main parts is based on continuous operation by rated load, it may change due to
conditions to use and environment.