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Sand and moisture penetration may affect the performance of electric devices in-
side the PCS!
• Do not perform electrical connection in sandy season or when the ambient rela-
tive humidity is above 95%.
• Perform electrical connection on fine weather days.
Disconnect all AC and DC switches before troubleshooting.
Disconnection of the AC and DC switches in no way implies that there is no voltage
of the cable connection terminals inside the AC and DC cabinets. To avoid the risk
of electric shock before maintenance work,
• Disconnect the AC and DC switches;
• Disconnect the upstream and downstream switches of the PCS.
12.1.2 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 the 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.
• Necessary ground and short circuit connections.
• Cover the adjacent electrical components with insulation cloth during operation.
12.2 Maintenance
12.2.1 Introduction
With TYPE 3R protection degree, the PCS can be installed outdoors. Harsh environment
condition or long-time operation, however, may cause aging and damage to the PCS.
Checking and maintaining the PCS periodically and replacing the aged components can ef-
fectively prolong the service life and increase the performance of internal devices.
A periodic maintenance is necessary, especially when the system performance is
poor.
System Manual 12 Routine Maintenance
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