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14
Routine Maintenance
Due to the effect of ambient temperature, humidity, dust and vibration, the inner components
of the PCS will be aging and worn out. To ensure the system safety and maintain the effi-
ciency of the PCS, it is necessary to carry out routine and periodic maintenance.
All methods or operations to keep the PCS in good working condition are concluded as PCS
maintenance.
14.1 Safety Instructions
14.1.1 Safety Rules
Only qualified personnel can perform the work described in this chapter.
Do not leave any screws, washers or other metallic parts inside the PCS to avoid
damages to the PCS.
Disconnection of the switches in no way implies that there is no voltage of the ca-
ble connection terminals inside the AC and DC cabinet. To avoid the risk of electric
shock before opening the cabinet door,
• Disconnect the switches;
• Disconnect the upstream and downstream switches of the PCS.
Wait at least 5 minutes after PCS stops before any work on the PCS.
During the operation of the equipment, personnel should wear protective earplugs
when approaching.
14.1.1.1 Five Safety Rules
Respect the following five rules during maintenance or service on the PCS to ensure the
safety of the maintainer.
• Disconnect the PCS from all external connections and internal power supplies.
• Ensure that the PCS will not be started accidentally.
• Verify that the PCS interior is discharged completely with a multimeter.
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