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Switch ON the output breaker.
ώ
Switch ON the input breaker.
ώ
The UPS powers from the static bypass instead of the maintenance bypass, then the
bypass LED will light up.
Switch OFF the maintenance bypass breaker, then the output is supplied by the static
ώ
bypass of the UPS.
Put on the maintenance switch cover.
ώ
The rectifier will operate normally after 30 seconds. If the inverter works normally, the
system will be transferred from bypass mode to normal mode.
4.2.4 Cold start procedure
CAUTION:
Follow these procedures when the input AC Utility Failure, but
battery is normal
Set the Battery Breaker to the "ON" for long run UPS.
ώ
Switch ON the power switch for standard UPS.
ώ
Turn on the Output switch.
ώ
Switch ON the power switch (power will feed to auxiliary power board).
ώ
ώ Trigger the cold start button as the position 5 of the below drawing.
1
2
When battery normal, rectifier starts operation, 30s later, inverter starts and operates and
battery LED on
22
POWER
3
4
5
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