SECTION III
Operation
Page 3.11
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3.5 System Controls (continued)
BYPASS CIRCUIT BREAKER:
Used primarily for maintenance purposes.
When closed, it enables the UPS to be de-energized for maintenance procedures
while continuing to supply power to the critical load.
STATIC SWITCH BYPASS CIRCUIT BREAKER:
(On dual input units
only.) When closed, allows reserve input to supply power to the Static Switch.
OUTPUT SWITCH:
When closed, connects the critical load to the inverter
and static bypass switch.
3.6 UPS Operating Procedures
It is important for safety and the protection and performance of the UPS that
the step-by-step instructions for each procedure be followed in the sequence given.
3.6.1 System Startup Procedure
Before initiating UPS startup, make sure that:
• All circuit breakers/switches are OFF (open).
• The DC (Battery) disconnect switch on the battery pack is OFF (open).
Then
--
Each of the following steps must be completed before going to the
next step. Failure to do so may result in interruption of power to the
critical load.
1.
Rotate UPS CONTROL switch
knob clockwise to ON to energize the system or
DSP logic. If this screen appears, the UPS is not
in operable condition. Phone Customer Service
at (800) 777-8922 for assistance.
Checksum Bad
Service
Required
