Liebert UPS System user manual UL33-0400L 123020 Inv. On Units Mains Power

Chapter 5 Operation of Display Panel

UL33-0400L 2001-11-08			12:30:20
Inv. On	Units:		ID 1
Mains	Power	A(B)	B(C)	C(A)
Bypass				221	C
Out	Cap This operation leads			12.5
	to overload, Confirm			50.1
Local
	or cancel
System				.41
Battery	Factor
Input Breaker Close		11£ 08-	12:09
Byp. Breaker Close		11£ 08-	12:09
Output Breaker Open11£ -08			12:09		OK
UPS in Normal Mode 11£ -08			12:09
Batt. Boost Charging 11£ -08			12:09

Fig. 5-42 Capacity expansion

Start UPS capacity inadequate: When the UPS is in bypass mode, if the load capacity is larger than that of one or more than one UPS unit, the UPS that has already been start-up will not transfer to inverter mode and prompt a window to ask the user to confirm.

When the load is reduced to be lower than the capacity of UPS, the Prompt window will disappear.

UL33-0400L 2001-11-08			12:30:20
Inv. On	Units:		ID 1
Mains	Power	A(B)	B(C)	C(A)
Bypass				221
Out	Cap System overload,			12.5
Local	Turn on More UPS			50.1
System				.41
Battery	Factor
Input Breaker Close		11£ -08	12:09
Byp. Breaker Close		11£ -08 12:09
Output Breaker Open11£ -08			12:09
UPS in Normal Mode 11£ -08			12:09
Batt. Boost Charging 11£ -08			12:09

Fig. 5-43 UPS capacity inadequate

Load capacity higher than that of single module UPS system: If the UPS is in bypass operation mode, and the load capacity exceeds the total capacity of one or more than one UPS units, the LCD of the UPS that start first will display a Prompt window, as shown in Fig. 5-44. Under this condition, the user must decrease the load until the load is lower than the UPS capacity, or switch on the remained UPS until the total capacity exceeds the load capacity, thus the system can transfer to inverter mode and the Prompt window disappears.

65