8
3
4
5
PARALLEL : MASTER
00.00kVA / 000%
PARALLEL : SLAVE
00.00kVA / 000%
Manual Bypass Operation (for UPS maintenance or replacement)
WARNING! For qualified service personnel only. Failure to follow the bypass procedure completely will not
adequately power down the UPS, resulting in the continued risk of death or injury from potential contact
with high voltage. The UPS and detachable PDU are extremely heavy. This procedure requires several people
to perform. Please read the procedure completely before proceeding. Failure to follow the UPS removal
procedure correctly may result in a loss of power to the protected load.
The UPS system includes an independent, detachable PDU with a Maintenance Breaker Switch. This switch allows qualied service personnel
to remove the detachable PDU from the UPS for routine maintenance without disrupting power to connected loads. While this switch is set to
“BYPASS”, connected equipment will receive unltered AC mains power, however, equipment will not receive battery power in the event of a
blackout.
Connection continued
3
Power ON the primary power module, being sure that all output
breakers (SUPDMB20K & SUPDMB20KIEC) are OFF.
4
After primary power module start-up is complete, power ON the
secondary power module. The UPS systems will self detect the
Parallel Mode and show the following screen shots for the master
and slave power modules:
When the unit is in Parallel Mode the primary power module will
display “Parallel: Master” and the secondary power module will
display “Parallel: Slave”.
5
Once Parallel Mode is detected, turn ON all output breakers
(SUPDMB20K & SUPDMB20KIEC) on the PDU.
UPS Removal
STEP 1. Disable PowerAlert and disconnect the SNMP, serial or USB communication cables from the communication ports on the UPS. Do NOT
remove the parallel cable at this point. A disconnection of the cable before the power module is properly shut down can result in multiple
error messages depending on your conguration.
STEP 2. Before proceeding, determine your maintenance status (i.e. which UPS system requires maintenance and whether you are in Redundancy or
Power Mode per the Output/Bypass Breaker Operation chart on page 9).
