Turn-Off Procedures; On-Line Mode Turn-Off Procedures; Battery Mode Turn-Off Procedures - Delta DPH Series User Manual

6.3

Turn-off Procedures

6.3.1

On-Line 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
Tap the ON/ OFF Button (
the bypass AC source supply power. At the moment, if the bypass is abnormal, there is a
risk of output interruption.
Step 2
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1) and
Bypass Breaker or Switch (Q2). 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 screen and tri-color LED indicator will be off.
Step 4
Switch OFF the external maintenance bypass cabinet's Output Breaker or Switch (Q4).
6.3.2

Battery 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.
Step 2
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1) and
Bypass Breaker or Switch (Q2).
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.
Step 4
Switch OFF the external maintenance bypass cabinet's Output Breaker or Switch (Q4).
) to shut down the UPS's inverter. After that, the UPS will let
103
) to shut down the UPS's inverter.