Frequency Conversion Mode Turn-Off Procedures; Start-Up & Turn Off Procedures For Parallel Units - Delta DPS Series User Manual

Step 2
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1),
Bypass Breaker or Switch (Q2), and Output Breaker or Switch (Q4). After that, the UPS will
transfer to Standby mode.
Step 3
Wait for the UPS to complete the DC BUS discharging. After that, switch OFF each external
battery cabinet's breaker (Q5), and the LCD and tri-color LED indicator will be off.
6.3.6

Frequency Conversion Mode Turn-off Procedures

WARNING:
Before turning off the UPS, please read 6.1 Pre Start-up & Pre Turn-off Warnings
thoroughly and ensure that the precautions and instructions have been followed.
Step 1
Please make sure that the critical loads connected to the UPS have already been safely shut
down. After confirmation, tap the ON/ OFF Button (
Note that once you turn off the inverter, all the output power will be completely cut off, and
the UPS will transfer to Standby mode. Now, the power modules keep charging the batteries.
Step 2
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1),
Bypass Breaker or Switch (Q2), and Output Breaker or Switch (Q4). After that, the UPS will
transfer to Standby mode.
Step 3
Wait for the UPS to complete the DC BUS discharging. After that, switch OFF each external
battery cabinet's breaker (Q5), and the LCD and tri-color LED indicator will be off.
6.4 Start-up & Turn off Procedures for Parallel Units
WARNING:
1. Before turning on the UPS, please read 6.1 Pre Start-up & Pre Turn-off
Warnings thoroughly and ensure that the precautions and instructions have
been followed.
2. Ensure that every operation procedure is synchronized to all parallel UPSs. If
you just want to operate a specific UPS but not all the parallel ones, please
contact service personnel.
Start-up Procedures (Parallel Units)
•
Step 1
Ensure that each parallel cable (provided) is connected well.
) to shut down the UPS's inverter.
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