Delta Modulon DPH Series User Manual page 31

When the UPS needs maintenance, you can manually switch the UPS to Manual Bypass
mode. To let the UPS run in Manual Bypass mode, please follow the procedures below:
1
2 Tap the LCD's ON/ OFF Button (
3
Turn ON the Manual Bypass Switch (Q3).
4
Turn OFF the Bypass Switch (Q2).
5
Turn OFF the Input Switch (Q1) and Output Switch (Q4).
6
Turn OFF each external battery cabinet's breaker (Q5).
personnel can perform maintenance safely. Please see Figure 3-4 for Manual Bypass
MAIN
Batteries
(Figure 3-4: Manual Bypass Mode Diagram_ Single Input Single Unit)
Q3
Static Switch
Q2
Rectifier
Q1
Q5
3-5
) and the 'POWER OFF?' screen will pop up to
Inverter
3 Operation Modes
'YES'.
LOAD
Q4