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9 – Start-Up, Shutdown and Bypass (continued)
9-3 Standard Start-Up Procedure (Single UPS) (continued)
Switch on the bypass input breaker switch •
Q2
and then output
circuit breaker switch
Q4
. After a brief initialization process, the
LCD screen will show “ON AUTO BYPASS”, the “BYPASS”
LED will illuminate and UPS system output will be supplied by
the bypass (reserve) power source.
Switch on the main input circuit breaker switch •
Q1
. If the AC
input power source is normal, the UPS system is ready for start-up.
Press the ON button •
A
for 3 seconds (until you hear a beep), then
release the button. The inverter will activate and synchronize with
the bypass source, then automatically switch from auto bypass
(reserve) mode to online (normal) mode. The “BYPASS” LED will
darken and the “NORMAL” LED will illuminate.
9-4 Battery Start-Up Procedure (Single UPS)
Note: The battery must be at least partially charged for this operation to succeed.
If there is an external battery cabinet connected, switch on the •
circuit breaker
A
of the external battery cabinet. On the SU20KX
or SU40KX, turn on the battery breaker on the back of the UPS.
Confirm that the manual bypass circuit breaker switch •
Q3
is off.
Press the ON button •
A
for 3 seconds (until you hear a beep), then
release the button. The inverter will activate and use stored DC
battery power to supply AC power to connected equipment. The
“BATTERY” LED will illuminate.
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