Bypass Mode Turn-Off Procedures - Delta Modulon DPH series User Manual

6.3.3 Bypass Mode Turn-off Procedures

1
In bypass mode, the LCD shows the following screen (Figure 6-51) and the tri-color
LED indicator illuminates yellow. For the tri-color LED indicator location, please refer to
Figure 2-11.
UPS-1.1
Power Flow
Power Flow
Summary
System Status
2
Single Input:
Switch OFF the UPS's bypass switch (Q0), Delta or non-Delta external maintenance
bypass cabinet's input breaker or switch (Q1) and output breaker or switch (Q4).
Dual Input:
Switch OFF the UPS's bypass switch (Q0), Delta or non-Delta external maintenance
bypass cabinet's input breaker or switch (Q1), bypass breaker or switch (Q2) and output
breaker or switch (Q4).
3 Now, each power module performs DC BUS discharging and its LED indicator flashes
green. After discharging, each power module's LED indicator will be off.
4
About 3 minutes later, the UPS will shut down. After that, the LCD and the tricolor LED
indicator will be off.
5 Switch OFF every external battery cabinet's breaker (Q5).
Modulon DPH Series
WARNING:
1. For parallel units, ensure that every operation procedure mentioned below is
synchronized to all parallel UPSs.
2. For parallel application, if you just want to operate a specific UPS but not all
parallel ones, please contact service personnel.
MEASUREMENT SETUP
POWER FLOW
Maintenance
Bypass
Bypass
Mains
90 %
5 mins
(Figure 6-51: Bypass Mode Screen)
MAINTENANCE LOG IN EVENT LOG
User
6-38
10:15
May 25,2018
Bypass
Load
30 %