Modifications reserved
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OPM_LPS_3UO_80K_M10_1US_V010.doc
User Manual
LP33 Series 80 & 100 UL S1
7.2.2 Parallel UPS shutdown with load transfer on manual bypass Q2
The purpose of this procedure is to supply the
load
directly by
utility
through
manual bypass Q2
.
This procedure is normally performed when the
System Parallel
must be completely switched OFF for
maintenance or service purpose, performed by an authorized
Service Center
.
The
synoptic diagram
, on all UPS units, must display the
status
“
LOAD SUPPLIED BY INVERTER
”
.
1. Disconnect the inverter by pressing
“
Inverter OFF
”
( O ) key and hold until the LED Inverter (7)
turns OFF on all UPS units.
The output will be supplied by the utility through all
automatic bypass
.
LEDs Alarm
are lit and the
LEDs Operation
are Off.
The
synoptic diagram
, on all UPS units, must display the
status
“
LOAD SUPPLIED BY AUTOMATIC BYPASS
”
.
2. Close the manual bypass switch Q2 (Pos. I) on all UPS units.
Load
is now supplied from
utility
in parallel from
automatic bypass
and
manual bypass Q2
of all UPS units.
The
synoptic diagram
, on all UPS units, must display the
status
“
LOAD SUPPLIED BY AUTOMATIC BYPASS AND
MANUAL BYPASS Q2
”
.
3. Open the output switch Q1 (Pos. 0) on all UPS units.
The
load
is now supplied only through the
manual bypass
Q2
.
The
synoptic diagram
, on all UPS units, must display the
status
“
LOAD SUPPLIED BY MANUAL BYPASS Q2
”
.
4. Press “Load Off” key on all UPS units.
5. Switch OFF (Pos. 0) the “Battery Breaker” on each battery cabinet.
The
acoustical alarm
is activated, press
“MUTE”
key to reset it.
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