Manual Bypass Mode Start-Up Procedures - Delta DPH Series User Manual

6.2.4

Manual Bypass Mode Start-up Procedures

WARNING:
1. Before turning on/ 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.
2. In Manual Bypass Mode, make sure that all of the switches/ breakers (except
for the external maintenance bypass cabinet's Manual Bypass Breaker/ Switch
(Q3)) are in the OFF position before working on the UPS's internal circuits to
prevent electric shock. DO NOT touch any external maintenance bypass
cabinet's terminal and bus bar which may carry high-voltage electricity.
From On-Line Mode to Manual Bypass Mode
•
Step 1
Tap the ON/ OFF Button (
Step 2
Ensure that the UPS runs in Bypass mode. After confirmation, turn ON the external
maintenance bypass cabinet's Manual Bypass Breaker or Switch (Q3).
Step 3
Switch OFF the external maintenance bypass cabinet's Input Breaker or Switch (Q1) and
Bypass Breaker or Switch (Q2). After that, the LCD screen shows as follows.
Step 4
Wait for the UPS to complete DC BUS discharging. After discharging, switch OFF every
external battery cabinet's breaker (Q5), and the LCD and tri-color LED indicator will be off.
Step 5
Switch OFF the external maintenance bypass cabinet's Output Breaker or Switch (Q4).
) on the LCD screen to shut down the inverter.
95