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IV420E Rev.00 SIEL S.p.A.
Installation and user manual
Date of issue: 2019-01-29
Pag. 27 di 72+ FR
If the UPS is running normally and can be controlled through the display, carry
out steps 1 to 6; otherwise, jump to Step 5.
◆
Open the cover of maintenance switch, the UPS turns to bypass mode automatically.
◆
Turn on MAINTANCE breaker;
◆
Switch OFF BATTERY breaker;
◆
Switch OFF MAINS breaker;
◆
Switch OFF BYPASS breaker;
◆
Switch OFF OUTPUT breaker;
At this time the bypass source will supply to the load through the MAINTENANCE breaker
.
Switch to normal operation (from mechanical bypass)
CAUTION!
Never attempt to switch the UPS back to normal operation until you have
verified that there are no internal UPS faults.
◆
Turn ON OUTPUT breaker.
◆
Turn ON BYPASS breaker.
◆
Turn ON MAINS breaker
.
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 bypass of the UPS.
◆
Put on the maintenance switch cover.
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
◆
Turn on the BATTERY breaker.
The battery will feed the Auxiliary power board.
◆
Turn on the OUTPUT breaker.
◆
Trigger the cold start(Cold start) button as the position 11 of the below drawing.
Содержание 50-200kVA PF-1 UPS
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