HP PowerTrust A3589A, Manual, Page: 115 / 257

Chapter 5 5-3
Verification Procedures
Load Testing
3. Take action based on one of these conditions:
a. If the indications in step 2 occur, the equipment attached to the UPS is within the
accepted load range of the UPS. Proceed to step 4.
b. If the
Attention
light flashes, the PowerTrust UPS is overloaded. Either obtain a UPS
with more capacity or reduce the load to the unit by switching off, then removing,
some of the connected equipment. Repeat the load test until you are successful. Refer
to Chapter 3, “Installing the UPS.”.
c. If the unit shuts OFF the attached equipment (removes power from the Output
receptacles) and the Attention LED is ON continuously, there is an overload
shutdown condition. Refer to “Case 10 (Normal or Abnormal) — Overload or EPO
Shutdown” in Chapter 6. This may be caused by a heavy overload. You must resize
the attached load (refer to “Sizing the Load” in Chapter 3), then repeat the load test
until your are successful.
A fault in the load can also cause an overload shutdown.
4. Check that all connected equipment is functioning normally and that there is no
disturbance to the connected equipment. This verifies that the UPS transfer time (the
very brief time between power loss and battery start-up) did not disturb the connected
equipment. If so, the UPS passed the Load Test.
5. Repeat these tests a few times under various operating conditions to ensure that the
PowerTrust UPS can properly power the load under all conditions.
If the Load Test is successful, the equipment will be protected by the PowerTrust UPS.
NOTE You must repeat the load test whenever you add new equipment or change
the equipment that is plugged into the UPS unit.