Delta Modulon DPH Series User Manual page 139

7
When the UPS performs DC BUS discharging, each power module's LED indicator
8
About three minutes later, the UPS will shut down, and the LCD and the tri-color
9
Switch OFF every external battery cabinet's breaker (Q5).
From Manual Bypass Mode to Online Mode
WARNING:
1. For parallel units, please follow
normally, follow the procedures below step by step.
2. For parallel units, ensure that every operation procedure mentioned below
is synchronized to all parallel UPSs.
parallel ones, please contact service personnel.
1
Switch ON every external battery cabinet's breaker (Q5).
2
Switch ON the Input Breaker (Q1), Bypass Breaker (Q2) and Output Breaker (Q4).
3
After you switch on the Input Breaker (Q1) and Bypass Breaker (Q2), each
auxiliary power card's LED indicator will illuminate green and the following status
will occur simultaneously.
(1) The system and each power module will start initialization. After each power
module finishes initialization, each power module's fans will start running, each
power module will start establishing DC BUS voltage and each power module's
LED indicator will illuminate green.
(2) Each parallel communication card's LED indicator will illuminate red first and
then each card will start initialization. After initialization, the master parallel
communication card's LED indicator will illuminate green and the backup
communication card's LED indicator will illuminate yellow.
For the locations of the parallel communication cards, auxiliary power cards, power
modules and their LED indicators, please refer to
4
The LCD initial screen (see
Input Breaker (Q1) and Bypass Breaker (Q2) are turned on.
) will appear within 40 seconds after the
6-15
6 UPS Operation
.