7.0Difficulty
7.1Troubleshooting chart (continued)
PROBLEM
POSSIBLE CAUSE
ACTION TO TAKE
UPS emitsloud tone during utility failure. Power I/O switch is on but computer equipment is not powered. Rear panel circuit breaker is not tripped.
UPS does not provide expected run time. Low battery warning is sounded prematurely.
UPS beeps continuously. Lamp within I/0 power switch is illuminated. Utility is not failed.
UPS does not shut down when
Low battery warning interval is shorter than 2 or 5 minutes (according to option switch #4 setting).
Low battery warning interval is much longer than 2 or 5 minutes (according to option switch #4 setting).
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UPS has shut down due to overload.
1.Excessive loads connected at UPS’s output receptacles.
2.Battery is weak due to wear or
recent operation during utility power outage.
1.Line cord plug is loose.
2.Circuit breaker is tripped.
1.Signal not applied during utility failure.
2.Signal is not referenced to UPS common.
1.Excessive loads connected at UPS’s output receptacles.
2.Battery capacity low due to consecutive utility failures.
UPS is loaded to less than 10% of rated capacity.
Turn off UPS and unplug excessive loads. Recheck computer system power requirements as described in installation instructions. UPS may be turned on when utility has been restored.
1.Unplug excessive loads from UPS. Recheck computer system power requirements as described in installation instructions.
2.The battery should be recharged by leaving the UPS plugged in for 12 hours - do not operate Test control during recharge. If UPS sounds low battery warning prematurely when retested, battery should be replaced.
1.Check fit of line cord plug.
2.Unplug excessive loads and reset circuit breaker (press button).
1.The UPS responds to this signal only during utility failures (load is operating from the UPS’s internal power source).
2.Signal must be referenced to the UPS’s common at pins 4 or 9.
1.Excessive loading may shorten run time to below 2 or 5 minute low battery warning interval - remove excessive loads.
2.Consecutive utility failures may not allow time for the battery to recharge thereby causing shortened run time.
This operation is normal. The low battery warning interval is adjusted at the factory for consistent operation at loads above 10% of rated capacity.
