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5User Guide Silcon DP300E Series 480V 120-160kVA
7OA0003 US rev. 03
Stop, Start & Operating the External Service Bypass Panel
2.0 Stop – Start and Operating the External Service
Bypass Panel
2.1 General
To avoid possible personal injury or equipment damage, be aware that there may be
AC voltage at the UPS’s output terminals/receptacles any time AC input power or
DC battery voltage is applied. The UPS can provide output voltage from the batteries
even when there is no AC input line voltage. When AC voltage is present, the UPS
can provide output voltage even when the batteries are disconnected. If you want to
be certain that there is no UPS output voltage, always disconnect the AC input
source, switch off the UPS, AND switch off the DC. TEST BEFORE TOUCHING!
Some units have been programmed at the factory for autostart. When this para-
meter is programmed to be on, the unit will automatically switch on whenever utility
(AC line) is applied. To switch this parameter off, see chapter 4.0.
For safety reasons, only qualified service personnel should do a complete start-up
or shut-down of the UPS whenever this is necessary. The qualified service person
should follow the instructions in the User and Installation Manual. The UPS must
be completely shut down before service or before the UPS is taken out of operation
for more than 24 hours.
Although users cannot completely start-up or shut down the unit, they can switch
the UPS into standby mode and return it to normal operation by following the
instructions below. (In stand-by mode, the UPS does not provide output voltage).
CAUTION!
WARNING!
Please read chapter 2.4.1
“Switching off” in this User
Guide, if UPS has to be
stopped for more than 48
hours.
2.2 Stop (stand-by)
Action Display shows Description
Open the front door
and activate the red
“OFF” push-button
2.3 Start (from stand-by)
Action Display shows
Open the front door and
activate the green “ON”
push-button
System off Alarm LED lights. Acoustic
alarm sounds for 30 seconds.
WARNING!
If the UPS system is installed
with a service bypass panel,
and the load equipment must
remain energized from utility,
refer to operating service
bypass panel before
proceeding chapter 2.2 - 2.5.
Normal operation
Load power xx%