Apc BK600EI User Manual download pdf (Page 30)

Page 28

7.1 Troubleshooting Chart (continued)

PROBLEM POSSIBLE CAUSE ACTION TO TAKE

UPS emits loud tone. Power I/0

switch is on but computer

equipment is not powered. UPS’s

rear panel circuit breaker is tripped

(button is extended). Normal utility

voltages are known to be present.

UPS has shut down due to severe

overload.

Turn off UPS and unplug excessive

loads. Laser printers will overload

the UPS and should be plugged into

a quality surge suppressor. See

the section covering Overloads.

Once overload is removed, reset

the circuit breaker (press button).

UPS beeps continuously. Lamp

within I/0 power switch is

illuminated. Utility is not failed.

1. Line cord plug is loose. 1. Check fit of line cord plug.

2. Circuit breaker is tripped. 2. Unplug excessive loads and

reset circuit breaker (press button).

UPS does not shut down when

RS-232 HI level is applied to

computer interface port pin 1.

1. Signal not applied during utility

failure.

1. The UPS responds to this signal

only during utility failures (load is

operating from the UPS’s internal

power source).

2. Signal is not referenced to UPS

common.

2. Signal must be referenced to the

UPS’s common at DB-9F pins 4 or 9.

Low battery warning interval is

shorter than 2 minutes.

1. Excessive loads connected at

UPS’s output receptacles.

1. Excessive loading may shorten

run time to below 2 minute low

battery warning interval - remove

excessive loads.

2. Battery capacity low due to

consecutive utility failures.

2. Consecutive utility failures may

not allow time for the battery to

recharge thereby causing

shortened run time.

Low battery warning interval is

much longer than 2 minutes.

UPS is loaded to much less than full

rated capacity.

This operation is normal. The low

battery warning interval is extended

when operated under light load.

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Apc BK600EI User Manual Page 30

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