Frequency Conversion Mode Turn-Off Procedures; Green Mode Turn-Off Procedures - Delta DPH Series User Manual

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) 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 and tri-color LED indicator will be off.
Step 4
Switch OFF the external maintenance bypass cabinet's Output Breaker or Switch (Q4).
6.3.7

Green 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, three is a
risk of output interruption.
Step 2
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1), and
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.
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
105
) to shut down the UPS's inverter.