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Verify that removal of UPS1 from the system bus will NOT overload UPS2 and cause the load
to drop.
1. Turn OFF the inverter on UPS1 (see Figure 65).
2. Verify that UPS1 is now in Static Bypass Mode.
3. Open Battery Breaker(s) for UPS1.
4. Verify that the Battery Status Light on UPS1 turns Red.
5. Open UIB1.
6. Open MOB1.
7. Verify that UPS1 is now completely OFFLINE.
10.8.2 Procedure to Put UPS1 Back Online
1. Close MOB1 (see Figure 65).
2. Close UIB1.
3. Verify that the Liebert APM UPS turns On.
4. Close the battery breaker for UPS1.
5. Verify that the battery status light on UPS1 turns Off.
6. Verify that UPS1 is now in Static Bypass Mode.
7. Turn on the Inverter on UPS1.
10.8.3 Procedure to Take UPS2 Offline While Leaving UPS1 Online
NOTICE
Risk of improper switching. Can cause damage to connected load.
Verify that removal of UPS2 from the system bus will NOT overload UPS1 and cause the load
to drop.
1. Turn OFF the inverter on UPS2 (see Figure 65).
2. Verify that UPS2 is now in Static Bypass Mode.
3. Open Battery Breaker(s) for UPS2.
4. Verify that the Battery Status Light on UPS2 turns Red.
5. Open UIB2.
6. Open MOB2.
7. Verify that UPS2 is now completely OFFLINE.
10.8.4 Procedure to Put UPS2 Back Online
1. Close MOB2 (see Figure 65).
2. Close UIB2.
3. Verify that the Liebert APM UPS turns On.
4. Close the battery breaker for UPS2.
5. Verify that the battery status light on UPS2 turns Off.
6. Verify that UPS2 is now in Static Bypass Mode.
7. Turn on the Inverter on UPS2.