Powerware 9150 Operating Modes

Operation

LED	Status	Description
OVERTEMP	On or	One of the main UPS components is too hot or the fan has
	Blinking	failed.
SERVICE	Blinking	Battery failure, fan failure, or configuration error exists.
		Contact your service representative. See “Service and Support”
		on page 57.
ALARM	Blinking	There is a UPS alarm condition. See Chapter 6,
		“Troubleshooting” on page 55 for additional information.

Operating Modes

Utility Power

The Powerware 9150 block diagram, shown in Figure 16, consists of several modules, each having its own functions:

:The rectifier/charger converts AC-power to DC-power and keeps the battery bank fully charged.

:The inverter converts DC-power back to AC-power, which is delivered to the load.

:The Static Bypass switch transfers the load to bypass when the inverter is overloaded or cannot power the load.

:The filter protects the load from disturbances in the utility when power is supplied through the Static Bypass switch.

:The Maintenance Bypass switch is used to bypass the UPS to utility power during maintenance, service, or startup.

Maintenance

Bypass Switch

			Static
	Rectifier/	Inverter	Bypass
Filter			Switch	Output
	Charger

Battery

Figure 16. Block Diagram of the Powerware 9150

Powerware® 9150 User’s Guide : www.powerware.com 41