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13. Troubleshooting & Maintenance
13-5 SV-iC5
13.3 Precautions for maintenance and inspection
CAUTION
Make sure to remove the input power while performing maintenance.
Make 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.
SV-iC5 series inverter has ESD (Electrostatic Discharge) sensitive components.
Take protective measures against ESD before touching them for inspection or
installation.
Do not change any inner parts and connectors. Never modify the inverter.
13.4 Check points
Daily inspections
Proper installation environment
Cooling system fault
Unusual vibration and noise
Unusual overheating and discoloration
Periodic inspection
Screws and bolts may become loose due to vibration, temperature changes, etc.
Check that they are tightened securely and retighten as necessary.
Alien substances are clogged in the cooling system.
Clean it using the air.
Check 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.
13.5 Part 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 short-life parts must also be changed during periodic inspection.
Part name Change period (unit: Year) Description
Cooling fan 3 Exchange (as required)
Smoothing capacitor in main circuit 4 Exchange (as required)
Smoothing capacitor on control
board
4 Exchange (as required)
Relays - Exchange (as required)