APC G5USV040P005SAIO Datasheet download pdf (Page 53)

34001813EN/AF - Page 53

4. Maintenance

Parallel UPS configuration with external bypass cabinet

Shutdown and isolation of one UPS unit

Shutdown and isolation of all the UPS units:

1 - First check that the total capacity of the remaining UPS units is

sufficient to supply the connected load.

2 - Press a button to exit sleep mode.

3 - Shut down the UPS by pressing the OFF button (38) for 3 seconds.

4 - Set output switch Q5N (11) to OFF.

5 - Set the battery circuit-breaker QF1 (13) (or set the battery circuit-

breakers of the auxiliary cabinets if any) to OFF.

6 - Set the input circuit-breaker Q1 (8) to OFF.

7 - Set the input circuit-breaker Q4S (9) to OFF.

8 - Wait until the display and LEDs go off.

The load is still protected by the other UPS units.

Maintenance or servicing can now be carried out on the UPS unit that

has been shut down.

1 - On each UPS unit, press a button to exit sleep mode.

2 - Shut down each UPS unit by pressing their OFF buttons (38) for 3

seconds.

3 - Set switch Q3BP (65) in the external bypass cabinet to ON.

4 - Set switch Q5N (66) in the external bypass cabinet to OFF.

5 - Set switch Q4S (64) in the external bypass cabinet to OFF.

6 - Set output switch Q5N (11) of each UPS unit to OFF.

7 - Set the battery circuit-breaker QF1 (13) of each UPS unit (or set the

battery circuit-breakers of the auxiliary cabinets if any) to OFF.

8 - Set the input circuit-breaker Q1 (8) of each UPS unit to OFF.

9 - Set switch Q4S (9) of each UPS unit to OFF.

10 - Wait until the control electronics of all UPS units have fully shut down.

The load is no longer protected by the UPS, but continues to be

supplied with AC power.

Maintenance or servicing can now be carried out.

Q1 Q4S Q3BP Q5N

QF1

Q4S

Q3BP

Q5N

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APC G5USV040P005SAIO Datasheet Page 53