GE Digital Energy SitePro 400 VAC CESeries 7 Operating Manual page 74

For parallel systems perform the following procedure on each unit,
starting from unit no. 1.
1. Switch OFF all the inverters by pressing the key "0" on the control panel of each unit.
NOTE !
While the system is redundant, pressing the key "OFF" shuts down the
inverter and it will stay OFF.
When the system is non-redundancy, pressing the key "O" will transfer the load to the utility, the
inverter remains operating, and the load will be re-transferred to the inverter.
In this case keep the key "O" pressed until the inverter switches OFF (LED 5 and 6 turns OFF, LED 7
turns ON).
The LCD display must indicate "LOAD ON BYPASS".
The LEDs 1, 2, 3, 4b, 7 and 8 are ON.
The LEDs 4a, 5, 6 and 9 are OFF.
NOTE !
Not following this procedure can cause protected loads to shut down!
2. Close the maintenance switch Q2 on each unit.
LEDs 9 will be ON on all the units when closing the first Q2
The load is now supplied by the mains also through all the manual bypass.
3. Open the output switch Q1 on each unit.
LEDs "Service check" are ON on each unit.
The load is now supplied only through the manual bypass.
4. On the control panel, press the push-button "load off" protected by the sliding red cover on all
the units of the parallel system.
The output contactor K6 will open on each unit.
The LCD display must indicate "load off" and LED 7 is OFF.
Proceed now to power down the rectifiers and DC links.
5. Turn the input rectifier switch Q4 OFF (0 position) on each unit.
6. Disconnect the battery by removing the external battery circuit breaker or battery fuses on
each unit.
The electronic boards and the control panels are still powered from AC power supply through the
plug X8 on the "P1 - Power Interface".
(Warning! This board will remain powered from the mains throughout this procedure!).
The load is now powered from the mains through maintenance switches Q2.
WARNING!
It will take 5 minutes for the DC capacitors to discharge.
Open only the front door, do not open any other part of the UPS.
Modifications reserved
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Operatine Manual SitePro 60 kVA