American Power Conversion 120-160kW Stop/Start UPS and Operating the External Service Bypass

Stop/Start UPS and Operating the External Service Bypass

2.0Stop/Start UPS and Operating the External Service Bypass Panel

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.

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.

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.

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).

2.1Stop UPS (for stand-by)

Action

Open the front door and activate the "ON" and "OFF" push-button simultaneously

Display shows	Description
	Alarm LED lights.
System off	Acoustic alarm sounds
	for 30 seconds

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

2.2Start UPS (from stand-by)

Action

Open the front door and activate the green "ON" push button

Display shows

Normal operation Load power xx%

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User Guide APC Silcon 120-160kW 400V UPS	5