5-7 Manual Bypass Start ups (Parallel Redundancy)
Only for maintenance purpose, you can turn on manual bypass switch. If you switch
on Q3 under normal condition, then inverter will turn off and output will be supplied
by manual bypass source.
5-7-1 Online Mode transfers into Manual Bypass Mode
1. press button
” O ”
of the UPS you want to turn off. Last for 3 seconds until you hear a
beep then release button.
- If the other UPS can take over the total loads, then the turn-off one will shutdown
inverter. LCD display shows
”LOAD NOT POWERED”
for the turn-off one. The
working UPS shows
”ONLINE MODE”
.
- If the total loads is greater than one UPS can take over, then both UPSs will
shutdown inverter and transfer to bypass mode. Both UPS shows
”ON AUTO
BYPASS”
.
2. Repeat Step1 for another UPS.
1. Switch
off
“Q1”
of both UPSs.
2. Confirm both UPSs are completely shutdown.
3. Switch on “Q3” of both UPS. Reserve power source supplies the loads. LCD display
shows
”ON MANUAL BYPASS”
.
4. Switch
off
”Q4”
and
”Q2”
of both UPSs. LCD display will be de-energized.
5. Switch off circuit breaker of external battery cabinet.
6. In this mode, only
”Q4”
and terminal block has hazard voltage. Service personnel can
perform maintenance work.
5-7-2 Manual Bypass Mode transfers into Online Mode
1. Switch on the circuit breaker of external battery cabinet.
2. Switch
on
”Q2”
and
”Q4”
of both UPSs.
Switch off
”Q3”
of both UPSs.
Both UPS shows
”ON AUTO BYPASS”
.
3. Switch
on
”Q1”
of both UPSs.
4. Press
on
” I ”
for 3 seconds until you hear a beep then release button.
5. Repeat step5 for another UPS. When When the inverter of both UPSs activate
normally, they will transfer to normal mode at the same time.
5-4
