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

6.2.4

Manual Bypass Mode Start-up Procedures

WARNING:
1. Before turning on/ off the UPS, please read
Warnings
have been followed.
2. In Manual Bypass Mode, make sure that all of the switches/ breakers
(except for 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 Manual
Bypass Switch (Q3).
Step 3
Switch OFF the Input Switch (Q1), Bypass Switch (Q2) and Output Switch (Q4). After
that, the 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 every external battery cabinet's breaker (Q5).
Delta UPS DPH 50-200kVA
thoroughly and ensure that the precautions and instructions
) on the LCD screen to shut down the inverter.
6.1 Pre Start-up & Pre Turn-off
92