Modifications reserved
Page 75/103
OPM_LPS_33E_60K_M12_2GB_V010.doc
Operating Manual
LP 33 Series 60-80-100-120 kVA / S2
6.
In order to discharge the DC link capacitors, insert the inverter by pressing
“
Inverter ON
”
( I ) key.
`
Home\Meter
INVERTER
f :
50.0
Hz
L1 :
7
V
L2 :
7
V
L3 :
7
V
T :
OK
SYNCHRONISED
Remark
:
Command
INVERTER ON
will be enabled only when the
inverter
voltage
of each phase decreases below
7 Vac
(about 30 seconds).
`
Home\Meter
BOOSTER
f :
50.0
Hz
L1 :
397
V
L2 :
395
V
L3 :
393
V
Vp :
5
V
Vn :
5
V
Before proceeding to step
7
, check on the display panel that the
DC
link voltage
(both polarities)
Vp
and
Vn
has reached the max.
voltage of
5 Vdc
(about 30 seconds).
The
acoustical alarm
is activated, press
“MUTE”
key (from Home
screen) to reset it.
7. Disconnect the inverter by pressing
“
Inverter OFF
”
( O ) key and hold until the LED Inverter (7)
turns OFF.
The
load
is now powered directly by
mains
through the
MANUAL BYPASS Q2
.
END OF PROCEDURE
WARNING !
If the above procedure is not completely performed, it could cause
serious damages to the UPS.
In case the procedure described on step
“6 - Discharge DC link capacitors”
cannot
be completely performed, the DC capacitors could be charged with dangerous
voltage for min.5 minutes.
Wait until capacitors are completely discharged before starting the UPS again.
Apart from the front door, do not open any other part of the UPS.
NOTE !
With separate mains inputs, it’s possible to disconnect mains rectifier.