American Power Conversion 120-160kW User Guide APC Silcon 120-160kW 400V UPS 5, 2.0 Stop/Start UPS and Operating the External Service Bypass Panel

Stop/Start UPS and Operating the External Service Bypass
990-4036
User Guide APC Silcon 120-160kW 400V UPS 5
2.0 Stop/Start UPS and Operating the External Service Bypass
Panel
Only qualified electricians should start up or shut down APC Silcon UPS systems and
instructions in the Installation Guide should be followed. Prior to being serviced, the APC
Silcon UPS must be left in shut-down mode for a minimum of 5 minutes.
Users without electrical qualifications may switch UPS to and from stand-by-mode/normal
operation, following instructions below. (In stand-by mode, the UPS has no output voltage).
2.1 Stop UPS (for stand-by)
2.2 Start UPS (from stand-by)
WARNING!
AC voltage generated either from batteries or mains may be present at UPS output.
Always disconnect AC input supply source, switch off UPS, AND switch off DC.
TEST BEFORE YOU TOUCH!
Some UPS systems have a factory-set autostart feature, automatically switching on UPS
whenever mains supply is switched on (AC line). See section 4.0 Parameter settings for
instructions on how to switch off this function.
CAUTION!
Refer to the Maintenance & Testing section in this guide if the UPS is to be taken out of
operation for more than 48 hours.
Action
Open the front door
and activate the "ON"
and "OFF" push-button
simultaneously
Display shows Description
Alarm LED lights.
Acoustic alarm sounds
for 30 seconds
System off
CAUTION!
If the UPS system is equipped with a service bypass panel, and if the load must remain
energized by mains, refer to the Operating Service Bypass Panel sections in this guide before
proceeding
Action
Open the front door
and activate the green
"ON" push button
Display shows
Normal operation
Load power xx%