Shut-Down Procedure - ABB DPA UPScale ST40 User Manual

7.2 Shut-down procedure

THE OPERATIONS DESCRIBED IN THIS CHAPTER MUST BE PERFORMED
BY A SERVICE ENGINEER FROM THE MANUFACTURER OR FROM AN
AGENT CERTIFIED BY THE MANUFACTURER
WARNING!
The DPA UPScale may be shut down completely if the load does not need input power for an
TM
extended period.
It may be switched to maintenance bypass mode for service or maintenance purposes, or transferred
to the off-line mode (ECO-mode) if the load does not need the highest degree of protection.
The load may be disconnected by means of the two ON/OFF (LOAD-OFF) buttons.
Complete shutdown procedure for DPA UPScale
The UPS should only be shut down when there is no need to supply the load. The following
procedures can only be executed after the load has been completely de-energized.
IF A PARALLEL UPS HAS TO BE TURNED OFF, THEN BOTH ON/OFF
BUTTONS ON ALL UPS MODULES HAVE TO BE PUSHED. IN THIS CASE,
THE POWER SUPPLY TO THE LOAD WILL BE INTERRUPTED
NOTE
1. Verify that the loads are shut down and that there is no need for power supply to the load.
2. If the loads are all disconnected, press simultaneously both ON/OFF-Buttons on UPS-control
panel on all control panels on each module.
On the LCD: "LOAD OFF, SUPPLY FAILURE" will appear and the LED-indicator will indicate
as shown below:
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
3. Open battery fuses/breakers on internal (if any) and external battery cabinets or racks.
4. Open the mains fuses/breaker in the building distribution panel.
MAKE SURE THE INTERNAL DC-CAPACITORS (ELCO) HAVE BEEN
DISCHARGED BY WAITING AT LEAST 10 MINUTES AFTER SHUTDOWN.
NOTE
THE DPA UPAScale TM
Modifications reserved
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Color
Green
OFF
OFF
OFF
Green
IS NOW VOLTAGE FREE.
:
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