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4.4.3 Return to Normal Parallel UPS With External Bypass Cabinet
Figure 4-8: Parallel UPS Configuration With External Bypass Cabinet
1 - Check that all switches on the UPSs are set to OFF.
2 - Apply bypass and input power to UPSs.
3 - Set switch Q4S (9) on each UPS to ON.
4 - Set output switch Q5N (11) on each UPS and CB11-CB16,
as applicable, to ON.
5 - Check that all the UPSs present in the installation are
included in the list on the display and confirm by pressing
the function button (35) on each UPS.
6 - Set CB2 in the external system bypass cabinet to ON.
7 - Set CB1 in the external system bypass cabinet to OFF.
8 - Set the input switch Q1 (8) on each UPS unit to ON.
9 - Set the battery circuit breakers of the auxiliary cabinets to ON.
The UPS units start automatically. LED (31) is ON.
The load is protected by the UPS.
If LED (31) remains OFF, press the ON button (37) on each UPS
unit (the UPS is in manual start mode) and confirm, if
necessary, by pressing the function key (35) marked .
If LED (31) still remains OFF and either of LEDs (32) or (33) is
ON, a fault has occurred (see Section 4.1).
MGE Galaxy 5000
Maintenance4 — 8 86-174010-00 B00