UPS Alarm and Status Messages

Table 7

Liebert NXL alarm and status messages (continued)

 

 

 

Event Message

Event Definition

Recommended Action

 

 

An active Input Current Limit alarm means the

Press “SILENCE” to silence the audible alarm.

 

 

detected input current (RMS) exceeds the limit

 

 

setpoint (default is 125%). This may be normal

Observe the meters on the One-Line Display for

 

 

depending on various operating conditions, such

input voltage level, battery charge/discharge

Input Current Limit

as input voltage level, output load level, and

current, and output load percentage kW. Investigate

 

 

whether the batteries have recently discharged.

any abnormal readings.

 

 

This alarm is self-clearing. When the condition is

If the reason for the alarm cannot be determined,

 

 

no longer present, the alarm and any control

contact your factory-authorized service provider.

 

 

activity tied to the alarm reverts to normal.

 

Input Disconnect

The rectifier disconnect device indicates that it is

 

(Q1) Open

 

in the open position.

 

Input Disconnect

The externally mounted input isolator indicates

 

(Q11) Open

 

that it is in the open position.

 

 

 

The Input Filter Disconnect is locked open.

 

 

 

The Input Filter Disconnect Cycle counter has

Press “SILENCE” to silence the audible alarm.

 

 

exceeded the setpoint. The Input Filter

 

 

Disconnect opens automatically as determined by

Attempt to manually close the disconnect by

 

 

the disconnect settings, or because of an unusual

pressing “Startup,” “Device Control,” “Close Trap.”

Input Filter Cycle

condition.

If the condition which caused the filter disconnect to

An example of a setting would be to automatically

lock open is still present, it re-opens.

 

 

 

 

open the filter disconnect under light load

If the disconnect cannot be manually closed or the

 

 

conditions to improve the input power factor. An

alarm cannot be cleared, contact your factory-

 

 

example of an unusual condition would be

authorized service provider.

 

 

unbalanced currents on the input, possibly

 

 

 

because of a suspect component in the filter itself.

 

 

 

This summary alarm means there is a problem

Press “SILENCE” to silence the audible alarm.

 

 

with input power. It is not acceptable to the

 

 

Rectifier.

Examine the One-Line Display. The Rectifier input

Input Not Avail

If the unit is running normally when this event

line feeding the Input Breaker should be green. If

occurs, the UPS goes to battery.

not, investigate source power to the UPS.

 

 

 

 

This alarm is self-clearing. When the condition is

If input power is good, and this alarm is active,

 

 

no longer present, the alarm and any control

contact your factory-authorized service provider.

 

 

activity tied to the alarm reverts to normal.

 

 

 

This is a summary event caused by an

 

 

 

interruption in communication between the

 

 

 

controls and a device on the Controller Area

 

 

 

Network (CAN).

Press “SILENCE” to silence the audible alarm.

 

 

The Internal Communication Error event indicates

Internal Comm

Press “RESET” to clear the alarm.

a loss of communications between the controls

If the alarm cannot be reset, or if the alarm condition

Error

 

and an external device.

 

returns, contact your factory-authorized service

 

 

The Internal Communication Error is displayed

 

 

provider.

 

 

when the controls detect a loss of communication

 

 

to a device on the Controller Area Network (CAN).

 

 

 

An infrequent occurrence that resets immediately

 

 

 

is probably not serious.

 

 

 

An overload condition is active on A phase.

Press “SILENCE” to silence the audible alarm.

 

 

A phase load condition exceeds 105%.

 

 

Check the Module Output Meter and note the A

 

 

A countdown timer is displayed on the One-Line

 

 

phase load percentage.

 

 

Display in response to this alarm, and indicates

 

 

If possible, reduce A phase loading.

 

 

the time remaining until a transfer to bypass

 

 

If the steady state load remains above 105%, allow

Inv Overload Ph A

occurs. The length of time remaining until transfer

the UPS to transfer to bypass and contact your

 

 

is directly proportional to the severity of the

factory-authorized service provider.

 

 

overload.

 

 

If the displayed load percentage is less than 100%

 

 

This alarm is self-clearing. When the condition is

 

 

and the alarm is still active, contact your factory-

 

 

no longer present, the alarm and any control

 

 

authorized service provider.

 

 

activity tied to the alarm reverts to normal.

 

 

 

 

 

 

 

54

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Image 60
Emerson 250-400kVA Attempt to manually close the disconnect by