MGE UPS Systems 3.5 to 21 kVA N+1 - Manual (Page 40)

3 . 0 S c o p e
This section describes the maintenance and service of the S4 Inverter, including safety instructions, preventive
maintenance, descriptions of replacement kits, and a troubleshooting table.
3.1 Safety Instructions for Servicing
IMPORTANT SAFETY INSTRUCTIONS FOR INVERTER SERVICING SHOULD BE PERFORMED OR SUPER-
VISED BY QUALIFIED PERSONNEL ONLY.
WARNING: IMPORTANT SAFETY INSTRUCTIONS FOR INVERTER SERVICING
SHOULD BE PERFORMED OR SUPERVISED BY QUALIFIED PER-
SONNEL ONLY.
WARNING: DC input power to the inverter is normally from a bank of bat-
teries with potentially high short circuit current capability.
Accidental welding and severe burns are highly possible if
mistake occurs during connecting or disconnecting these
conductors.
WARNING: The green grounding wire at the TB1-4 to E1 ground lug needs
to be removed, If the inverter is to be attached to AC input
power, instead of an AC free environment.
3 . 2 P r e v e n t a t i v e M a i n t e n a n c e
The following preventive maintenance routines should be considered as a minimum requirement. Your installation
and site may require additional preventive maintenance to assure optimal performance from your installed inverter
and associated equipment. These routines should be performed twice a year (more often if required). We strong-
ly recommend a contract with MGE Customer Support Services for preventive and remedial maintenance.
The technician or electrician performing preventive maintenance on the equipment must read and understand thor-
oughly this manual and be familiar with the indicators, controls, and operation of the equipment.
a. Isolate and de-energize the equipment for all maintenance operations.
b. Ensure that the equipment is clean and free of loose dust, dirt, and debris. The exterior of the enclosures can
be cleaned with a mild solution of soap and water, lightly applied with a lint-free cloth.
c. Inspect the air intake and exhaust areas in the inverter module. Verify that air flows freely through the equip-
ment. Clean the air intake and exhaust areas, and the enclosure interior, with a vacuum cleaner as required.
d. Initiate the start-up procedure.
e. Test the main operating sequences as applicable to your equipment configuration and installation.
3.5 to 21 kVA N+1 Inverter
page 3 — 2 Maintenance Adjustment and Troubleshooting