Manual Bypass Mode_ Single Input_ Single Unit - Delta Modulon DPH Series User Manual

3.1.4 Manual Bypass Mode_ Single Input_ Single Unit

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 Press the LCD's ON/ OFF button (
3
Turn on the Manual Bypass Breaker (Q2).
4
5
Turn off each external battery cabinet's breaker and take out every battery module
(optional) from the UPS's battery module slot. For the battery module slot's location,
please refer to 2.6 Internal View. For battery module (optional) information, please
refer to 5.9 Battery Module (Optional). For external battery cabinet information,
please refer to 5.6 External Battery Cabinet Connection Warnings.
personnel can perform maintenance safely. For manual bypass mode diagram, please see
Figure 3-4
MAIN
Batteries
Modulon DPH Series
WARNING:
1. In manual bypass mode, make sure that all of the breakers and switches (except
the Manual Bypass Breaker (Q2)) are in the OFF position before working on
the UPS's internal circuits. This avoids electric shock.
inside the UPS except the wiring terminals and the Manual Bypass Breaker
(Q2). Do not touch the wiring terminals and the Manual Bypass Breaker (Q2)
during UPS maintenance process to avoid electric shock.
the connected critical loads are not protected.
Q2
Q1
(Figure 3-4: Manual Bypass Mode Diagram_ Single Input Single Unit)
) once and the 'POWER OFF?' screen will pop
Static Switch
Rectifier Inverter
3-4
YES'.
LOAD
Q3