APC Smart-UPS VT 400 Technical Information download pdf (Page 41)

990-2282C-001 Smart-UPS® VT 10-40 kVA 400V, 208V, 200V – Operation 35

Troubleshooting

Status and Alarm Messages

This section lists the status and alarm messages that the UPS might display. The messages are listed in

alphabetical order, and a suggested corrective action is listed with each alarm message to help you

troubleshoot problems.

Display messages

Display Message Meaning Corrective Action

Automatic Self Test

Started.

The UPS has started pre-programmed

battery test.

No corrective action is necessary.

ABus Communication

Fault.

Communication fault detected on the

ABus.

Check ABus wiring. If this does not

help contact APC.

ABus Termination Fault. ABus termination is missing. Check if termination is present. If this

does not help contact APC.

Batt Temperature

Exceeded Upper Limit.

The temperature of one or more

battery units has exceeded the system

specifications.

Contact APC Customer Support

(see the back cover).

Battery over-voltage

warning.

The battery voltage is too high and

the charger has been deactivated.

Contact APC Customer Support

(see the back cover).

Bypass Not Available

Input Freq/Volt Out Of

Range.

The frequency or voltage is out of

acceptable range for bypass. This

message occurs when the UPS is

online, and indicates that the bypass

mode may not be available if

required.

Correct the input voltage to provide

an acceptable voltage or frequency.

Discharged Battery. The UPS is in battery operation and

the battery charge is low.

Note: Runtime is limited in duration.

No corrective action is necessary.

Shut down the system and the load

equipment or restore incoming

voltage.

Emergency PSU Fault. The redundant Emergency Power

Supply Unit (PSU) is not working.

The UPS will continue to work

normally, but the PSU should be

replaced.

Contact APC Customer Support

(see the back cover).

EPO Activated. The Emergency Power Off switch has

been activated.

Deactivate the Emergency Power Off

switch.

Fan fault. A fan has failed. Contact APC Customer Support (see

the back cover).

Int. Mech. Bypass

Switch Closed.

The internal mechanical switchgear is

closed.

No corrective action necessary. The

UPS is in internal mechanical bypass

operation.

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APC Smart-UPS VT 400 Technical Information Page 41

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