Dell 5600R OL HV-US User Manual

Page 71

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71

Troubleshooting

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Table 16. Typical Alarms and Conditions (continued)

Alarm or Condition

Action

Possible Cause

Bypass AC Under Voltage

(Notice 4)

Intermittent Alarm

The measured voltage on
Bypass is less than the upper
voltage limit specification for
bypass operation.

A notification alarm is generated and the
notice is logged.

Only apply this setting when Qualify Bypass is
set to Always and utility is present, but below
the bypass undervoltage range.

Do not apply this setting if a Utility Not
Present alarm is active.

Bypass Under/Over Freq

(Notice 5)

Intermittent Alarm

The measured voltage on
Bypass is out-of-range for either
the upper or lower voltage limit
specification for bypass
operation.

A notification alarm is generated and the
notice is logged.

Only apply this setting when Qualify Bypass is
set to Always and utility is present, but outside
the bypass frequency range.

Do not apply this setting if a Utility Not
Present alarm is active.

Rectifier Input Over Current

(Alarm 26)

Continuous Alarm

The UPS has detected that
rectifier input current limits
have been exceeded.

The UPS transfers to Battery mode if
supporting the load.

Inverter Output Over
Current

(Alarm 27)

Continuous Alarm

The UPS has detected that the
inverter output current limits
have been exceeded.

The UPS transfers to Bypass mode if
supporting the load.

DC Link Over Voltage

(Alarm 28)

Continuous Alarm

The link or rail voltage has
exceeded its upper threshold
limit.

The UPS transfers to Battery mode if
supporting the load.

DC Link Under Voltage

(Alarm 29)

Intermittent Alarm

The link or rail voltage has
dropped below its lower
threshold limit.

The UPS transfers to Battery mode if
supporting the load.

DC Link Imbalance

(Alarm 1234)

Intermittent Alarm

The internal ± DC bus (DC
rail) voltages generated in the
UPS are imbalanced.

The UPS transfers to Battery mode if
supporting the load.

Rectifier Fault

(Alarm 30)

Continuous Alarm

The UPS has detected a fault in
the rectifier circuit while
attempting recovery from
Bypass mode or Converter
mode.

Contact your service representative.

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