Newave_OPM_PV11_PV31 _GB_250805.doc Operation
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4.7 LOAD TRANSFER: FROM INVERTER OPERATION TO MAINTENANCE BYPASS
If it is necessary to perform service or maintenance on the UPS it is possible to transfer the UPS to
MAINTENANCE BYPASS.
BEFORE YOU SWITCH THE MAINTENANCE BYPASS TO POSITION «ON», MAKE SURE
THAT THE LOAD HAS BEEN TRANSFERRED TO MAINS SUPPLY (OFF-LINE MODE)
ALL THE OPERATIONS IN THIS SECTION MUST BE PERFORMED BY AUTHORISED
ELECTRICIANS OR BY QUALIFIED INTERNAL PERSONNEL.
Situation of UPS-System before starting the Transfer Procedure to Maintenance Bypass:
The load is protected by POWERVALUE UPS running in normal operation. The UPS system is
operating on inverter.
1. Using LDC panel, select the COMMANDS menu and choose command “LOAD TO
BYPASS”. This will transfer the LOAD to mains on the complete system.
On LCD panel “LOAD NOT PROTECTED” will appear.
2. Close Maintenance Bypass Switch IA1 (position ON).
On LCD: “MANUAL BYP IS CLOSED” will appear and the mimic panel will show:
LED Indicator
Colour
LINE 1
Green
LINE 2
Green
BYPASS Green
INVERTER RED
BATTERY Green
3. Press simultaneously both ON/OFF buttons on UPS-control panel.
On the LCD’s message “LOAD OFF, SUPPLY FAILURE” will appear and the mimic panel
will show:
LED Indicator
Colour
LINE 1
Green
LINE 2
OFF
BYPASS OFF
INVERTER OFF
BATTERY Green
4. Open output switch IA2 “Output Load”
5. Open battery fuses/breakers FA3
6. Open input fuses FA1 and FA2 so that the UPS is voltage-free.
THE LOAD IS NOW SUPPLIED BY MAINS AND IS NOT PROTECTED
!
!