American Power Conversion Redundant Switch Restart the computer on which PowerChute plus is

Configuration
		b. Restart the computer on which PowerChute plus is
		installed.
		c. Start PowerChute plus. Communication is to UPS-A.
		d. Configure UPS-A according to your requirements.
		e. Set the UPSID to UPS_A.
When one UPS	When one of the two UPSs becomes unavailable to supply AC
becomes	power, PowerChute plus sends the message “Self test failed:
unavailable	invalid test.” Any of the following conditions will cause the
	message to occur:
	•	A UPS self-test fails.
	•	Communication with the alternate UPS is lost.
	•	The voltage of the alternate UPS is out of range.

• UPS-A fails, and the Redundant Switch transfers the power input and PowerChute plus communication to UPS-B.

To regain high availability for your system, correct the problem as soon as possible. See “Troubleshooting” on pa ge18.

Note

When any self-test of the primary UPS occurs, the Redundant Switch switches power and communication to the other UPS, causes a self- test of that UPS, and then switches back. This is normal behavior.

14 APC Redundant Switch: Installation and Operation Manual