Chapter 13. Troubleshooting & Maintenance
13.3 Precautions for maintenance and inspection
CAUTION
zMake sure to remove the input power while performing maintenance.
zMake sure to perform maintenance after checking the DC link capacitor has discharged. The bus capacitors in the inverter main circuit can still be charged even after the power is turned off. Check the voltage between terminal P or P1 and N using a tester before proceeding.
zC series inverter has ESD (Electrostatic Discharge) sensitive components. Take protective measures against ESD before touching them for inspection or installation.
zDo not change any inner parts and connectors. Never modify the inverter.
13.4 Check points
zDaily inspections
9Proper installation environment
9Cooling system fault
9Unusual vibration and noise
9Unusual overheating and discoloration z Periodic inspection
9Screws and bolts may become loose due to vibration, temperature changes, etc. ) Check that they are tightened securely and retighten as necessary.
9Alien substances are clogged in the cooling system.
)Clean it using the air.
9Check the rotating condition of the cooling fan, the condition of capacitors and the connections with the magnetic contactor.
) Replace them if there are any abnormalities.
13.5Part replacements
The inverter consists of many electronic parts such as semiconductor devices. The following parts may deteriorate with age because of their structures or physical characteristics, leading to reduced performance or failure of the inverter. For preventive maintenance, the parts must be changed periodically. The parts replacement guidelines are indicated in the following table. Lamps and other
| Part name |
|
| Change period (unit: Year) | Description |
Cooling fan |
|
|
| 3 | Exchange (as required) |
Smoothing | capacitor | in | main | 4 | Exchange (as required) |
circuit |
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Smoothing | capacitor | on | control | 4 | Exchange (as required) |
board |
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Relays |
|
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| - | Exchange (as required) |
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