Delta DPS-400K - Page 88

7-8
Ultron DPS Series
3
Check if LEDs illuminate as follows to ensure that the UPS is in bypass mode.
Fault
4
Turn on the Manual Bypass Switch (Q3) and turn off the Input Switch (Q1) and the
Bypass Switch (Q2). All LEDs are off and the following screen appears.
BYPA.
MAIN
2010 - 06 - 01
11 : 59 : 59
UNIT : #1.1
LOAD UNPROTECTED
ON MANUAL BYPASS
TO BROWSE EVENT
(004)
PRESS
5
When the UPS’s power module performs discharging, the Inverter Start-up LED
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LED
turns off, the UPS shuts down, and no screen appears.
6
Turn off the Output Switch (Q4) and switch off the circuit breakers or fuses of all
external battery cabinets.
7
Open the auxiliary power fuse holder.
y
From Manual Bypass Mode to Normal Mode (Single)
1
Close the auxiliary power fuse holder.
2
Switch on the circuit breakers or fuses of all external battery cabinets.
3
Turn on the Input Switch (Q1), the Bypass Switch (Q2) and the Output Switch (Q4).
After initialization, all fans start running and the UPS's DC BUS voltage starts
establishing.
4
Switch off the Manual Bypass Switch (Q3). The bypass supplies power to the
critical loads, the following screen appears and LEDs illuminate as follows.