Manual Bypass Mode_ Dual Input_ Single Unit - Delta Modulon DPH series User Manual

3.2.4 Manual Bypass Mode_ Dual 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 Tap the LCD's ON/ OFF Button (
3
Turn ON the Manual Bypass Breaker (Q3).
4
Turn OFF the Bypass Breaker (Q2).
5
Turn OFF the Input Breaker (Q1) and Output Breaker (Q4).
6
Turn OFF each external battery cabinet's breaker (Q5).
personnel can perform maintenance safely. Please see Figure 3-18 for Manual Bypass
Modulon DPH Series
WARNING:
1. In Manual Bypass mode, make sure that all of the breakers (except the Manual
Bypass Breaker (Q3)) are in the OFF position before working on the UPS's
internal circuits. This avoids electric shock.
inside the UPS and maintenance can be performed safely. However, to avoid
electric shock, please do not touch the following parts: AC Input terminal block,
Bypass Input terminal block, UPS Output terminal block, Battery Input terminal
block, grounding terminals (see Figure 5-11~Figure 5-13 for the location of
these terminal blocks and terminals) and any copper bars connected to the
Manual Bypass Breaker (Q3), as they may carry high voltage.
the connected critical loads are not protected.
) and the 'POWER OFF?' screen will pop up to
3-18
'YES'.