Operation

Table 7

Alarms, functions, and corrective actions (continued)

 

 

 

 

 

 

 

 

 

 

Actual

 

 

 

 

 

 

 

 

Alarm/fault

 

 

 

 

 

 

 

 

Name

 

 

 

 

 

 

 

 

Displayed

 

Description

Fault

 

 

 

 

 

On Front

 

of Alarm/

Or

Latch

Dial

Freeze

Event Log

 

Panel

 

Fault

Alarm

Mask

Mask

Mask

Mask

Meaning and Corrective Action(s)

 

 

 

 

 

 

 

 

With the load on Static Bypass, the phase A

 

 

 

 

 

 

 

 

output kVA or kW or RMS current has

 

 

 

 

 

 

 

 

exceeded 115% of the nominal per-phase

SBS Ovld

 

SBS Overload

Alarm

NO

NO

NO

YES

kVA or kW or RMS current rating. The UPS

Phase A

 

Phase A

will show time remaining until a shutdown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

will occur, per the Overload vs. time curve.

 

 

 

 

 

 

 

 

The alarm will clear when the overload falls

 

 

 

 

 

 

 

 

to below 110% of the rating.

 

 

 

 

 

 

 

 

With the load on Static Bypass, the phase B

 

 

 

 

 

 

 

 

output kVA or kW or RMS current has

 

 

 

 

 

 

 

 

exceeded 115% of the nominal per-phase

SBS Ovld

 

SBS Overload

Alarm

NO

NO

NO

YES

kVA or kW or RMS current rating. The UPS

Phase B

 

Phase B

will show time remaining until a shutdown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

will occur, per the Overload vs. time curve.

 

 

 

 

 

 

 

 

The alarm will clear when the overload falls

 

 

 

 

 

 

 

 

to below 110% of the rating.

 

 

 

 

 

 

 

 

With the load on Static Bypass, the phase C

 

 

 

 

 

 

 

 

output kVA or kW or RMS current has

 

 

 

 

 

 

 

 

exceeded 115% of the nominal per-phase

SBS Ovld

 

SBS Overload

Alarm

NO

NO

NO

YES

kVA or kW or RMS current rating. The UPS

Phase C

 

Phase C

will show time remaining until a shutdown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

will occur, per the Overload vs. time curve.

 

 

 

 

 

 

 

 

The alarm will clear when the overload falls

 

 

 

 

 

 

 

 

to below 110% of the rating.

 

 

 

 

 

 

 

 

The instantaneous inverter current of any

Inverter I

 

Inverter

 

 

 

 

 

one phase has exceeded its pulse-by-pulse

 

Alarm

NO

NO

NO

YES

current limit value. The UPS will shutdown

Limit

 

Current Limit

 

 

 

 

 

 

when the Current Overload vs. time curve is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

exceeded.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output frequency differs from the nominal

Output OF/UF

Output OF/UF

Alarm

NO

YES

NO

YES

(60Hz) by more than 0.5Hz. No transfer or

shutdown occurs. Contact Liebert Global

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Services at once.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

With the load on UPS, Phase x output KVA

 

 

 

 

 

 

 

 

or KW or RMS current has exceeded 105%

 

 

Inverter

 

 

 

 

 

of the nominal per phase rating. The UPS

Inv Ovld

 

 

 

 

 

 

will begin sending the time remaining until a

 

Overload

Alarm

NO

YES

NO

YES

Phase A

 

transfer or shutdown will occur, per the

 

Phase A

 

 

 

 

 

 

 

 

 

 

 

 

Overload vs. Time Curve. The alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condition will clear when the overload

 

 

 

 

 

 

 

 

returns to below the nominal rating.

 

 

 

 

 

 

 

 

With the load on UPS, Phase A output kVA

 

 

 

 

 

 

 

 

or kW or RMS current has exceeded 105%

 

 

Inverter

 

 

 

 

 

of the nominal per phase rating. The UPS

Inv Ovld

 

 

 

 

 

 

will begin sending the time remaining until a

 

Overload

Alarm

NO

YES

NO

YES

Phase B

 

transfer or shutdown will occur, per the

 

Phase B

 

 

 

 

 

 

 

 

 

 

 

 

Overload vs. Time Curve. The alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condition will clear when the overload

 

 

 

 

 

 

 

 

returns to below the nominal rating.

82

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Image 90
Liebert 30-130kVA manual Output kVA or kW or RMS current has