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8 – Start-Up, Shutdown and Bypass (continued)
8-11 Switching to Normal Mode from Manual Bypass Mode (Parallel UPS—MUS)
• If the UPS systems have external battery cabinets connected,
switch on the external battery cabinet circuit breaker switch of
each battery cabinet for each UPS.
• Switch on the bypass input circuit breaker switch
Q2
and the
output circuit breaker switch
Q4
of each UPS system.
• Confirm that all UPS systems are in manual bypass mode, then
switch off the manual bypass input circuit breaker switch
Q3
of each UPS system. The LCD screen will read “ON AUTO
BYPASS”.
• Switch on the main input circuit breaker switch
Q1
of each UPS
system.
• Press the ON button
A
of the first UPS system for 3 seconds (until
you hear a beep), then release the button. Press the ON button
for each of the remaining UPS system for 3 seconds (until you
hear a beep), then release the button. When the inverters of all
UPS systems are operating normally, they will switch to on-line
(normal) mode at the same time.
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12-212-93-3141.indb 28 12/28/2012 11:17:51 AM