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

6.3.6

Frequency Conversion Mode Turn-off Procedures

WARNING:
Before turning off the UPS, please read
Warnings
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 (
inverter. 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 Output Switch (Q4) and log in as an Administrator. For the
Administrator password, please contact service personnel.
Step 3
Go to SETUP → Mode Setting → On-Line. If the bypass voltage is in the normal
range, the UPS will run in Bypass mode to let the bypass AC source supply power to
the output.
Step 4
Switch OFF the Input Switch (Q1) and Bypass Switch (Q2).
Step 5
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.
Delta UPS DPH 50-200kVA
thoroughly and ensure that the precautions and instructions have
6.1 Pre Start-up & Pre Turn-off
) to shut down the UPS's
104