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Preventative Maintenance
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Maintenance Safety
Prior to following any Maintenance Procedures, follow the System Shutdown and
Lock-out and Tag procedure.
Operational Safety Procedures
Never work alone when servicing this equipment. A team of two is required until
the equipment is properly de-energized, locked-out and tagged, and verified de-
energized with a meter. Thoroughly inspect the equipment prior to energizing.
Verify that no tools or equipment have inadvertently been left behind.
De-Energize/Isolation Procedure
The following procedure should be followed to de-energize the PV225S for
maintenance:
To isolate the PV225S:
1. Turn the
ON/OFF switch to the OFF position.
2. Open the DC Disconnect Switch.
3. Open the AC Disconnect Switch.
4. Open the utility connection circuit breaker.
5. Install lockout devices on the utility connection circuit breaker and DC
Disconnect Switch.
WARNING: Shock Hazard
Review the system schematic for the installation to verify that all available energy sources
are de-energized. DC bus voltage may also be present. Be sure to wait the full 5 minutes to
allow the capacitors to discharge completely.
WARNING: Shock Hazard
The terminals of the DC input may be energized if the PV arrays are energized. In
addition, allow 5 minutes for all capacitors within the main enclosure to discharge after
disconnecting the PV225S from AC and DC sources.