Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition

Possible Cause

Action

Shutdown Imminent

(Alarm 55)

Continuous Alarm

Communication to external devices stops because the UPS has entered a state where it may abruptly stop operating without further notice unless utility returns.

The alarm is issued when the battery time remaining reaches zero. All connected devices should have already shut down gracefully.

Battery Test Failed

A weak battery string was

This is a warning notice. Dell recommends

(Alarm 191)

detected during the last battery

that you replace the batteries soon.

 

test.

 

 

Intermittent Alarm

 

 

 

 

 

 

 

 

 

Service Battery

A faulted battery string has

Contact your service representative.

 

(Alarm 149)

been detected and as a result,

 

 

the charger is disabled.

 

 

Continuous Alarm

 

 

 

 

 

 

 

 

Utility Not Present

Utility level has fallen below the

Transfer to battery if supporting load. Power

(Alarm 59)

Utility Not Present threshold

down if not supporting load.

 

(typically <25 to 50V).

 

 

Intermittent Alarm

 

 

 

 

 

 

 

 

Bypass Not Available

Utility is outside of the bypass

Check the bypass settings. See “Settings” on

(Alarm 105)

limits defined in the UPS.

page 42.

 

 

 

 

 

 

 

 

Input AC Over Voltage

Utility voltage exceeds the

The UPS transfers to Battery mode if

 

(Alarm 6)

maximum operating range.

supporting load.

 

 

 

 

Intermittent Alarm

 

 

 

 

 

 

 

Input AC Under Voltage

Utility voltage is below the

The UPS transfers to Battery mode if

 

(Alarm 7)

minimum operating range.

supporting load.

 

 

 

 

Intermittent Alarm

 

 

 

 

 

 

 

Input Under/Over Frequency

The utility frequency is out of

The UPS transfers to Battery mode if

 

(Alarm 8)

usable frequency range.

supporting load.

 

 

 

 

Intermittent Alarm

 

 

 

 

 

 

Site Wiring Problem

An alarm triggers when the

Have a qualified electrician correct the wiring

(Alarm 194)

difference between ground and

problem. If the UPS is not wired with a neutral

neutral voltage is >15V.

wire, Site Fault should be disabled in the

Continuous Alarm

 

Settings menu (see page 42).

 

 

 

 

 

 

 

Remote Emergency Power

The external contacts in the

The UPS de-energizes the load and enters

Off

rear of the UPS are configured

Standby mode. See “Installing Remote

 

(Alarm 12)

for REPO operation and they

Emergency Power-off” on page 25 for more

have been activated.

information.

 

Continuous Alarm

 

 

 

 

 

 

 

 

 

 

Troubleshooting

69

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Dell 4200W, K805N, J739N, K804N, 3750W, J730N, H952N manual Troubleshooting

H952N, K804N, J739N, K805N, J730N specifications

The Dell J730N, K805N, J739N, 4200W, and 3750W are all high-performance server power supplies designed to provide reliable power solutions for various Dell server models. These power supplies are engineered to ensure maximum uptime, energy efficiency, and seamless operation in data center environments.

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