GE Industrial Solutions LP 33U Series 10 & 20 kVA Operating Manual - Manual (Page 43)

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OPM_LPS_3UO_10K_20K_1US_V010.doc Operating Manual LP 33U Series 10 & 20 kVA / S1
7.1.2 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 UPS must be completely switched OFF for maintenance
or service purpose, performed by an authorized Service Center.
NOTE !
This procedure must not be performed if the UPS is used as frequency converter.
1. Disconnect the inverter by pressing “Inverter OFF” ( O ) key and hold until the LED inverter (7)
turns OFF.
Load is transferred to utility by automatic bypass.
LED Alarm is lit and the LED Operation is Off.
The synoptic diagram must display the status “LOAD SUPPLIED BY
AUTOMATIC BYPASS”.
2. Close the manual bypass switch Q2 (Pos. I).
Load is now supplied parallel through automatic bypass and manual bypass Q2.
The synoptic diagram must display the status “LOAD SUPPLIED BY
AUTOMATIC BYPASS AND MANUAL BYPASS Q2”.
3. Open the output switch Q1 (Pos. 0).
The load is now supplied only through the manual bypass Q2.
The synoptic diagram must display the status “LOAD SUPPLIED BY
MANUAL BYPASS Q2”.
4. Press “Total Off” key.
5. Remove the “rectifier input fuses - F1, F2, F3” and the “battery fuses - F9, F10, F11 / F13, F14, F15”
(remove the external battery fuses in case of external battery).
The acoustical alarm is activated, press “MUTE” key to reset it.
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