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 UPS, at least one phase of

 

 

 

 

 

 

 

 

the UPS KVA or KW has exceeded the

 

 

 

 

 

 

 

 

rated KVA, KW, or RMS current vs. Time

 

 

 

 

 

 

 

 

equation. (Note: This fault would have been

 

 

 

 

 

 

 

 

preceded by an “Inverter Overload Phase x

Inverter Ovld

 

Inverter

 

 

 

 

 

alarm.) The UPS will transfer the load to

 

Overload

Fault

YES

YES

YES

YES

Static Bypass if it is available. If the fault or

xfer

 

 

Transfer

 

 

 

 

 

overload clears the UPS will automatically

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

transfer from SBS to UPS. Remove the

 

 

 

 

 

 

 

 

excess load from the UPS and attempt to

 

 

 

 

 

 

 

 

re-start. If the load is below the rating of the

 

 

 

 

 

 

 

 

UPS and it will not re-start, contact Liebert

 

 

 

 

 

 

 

 

Global Services.

 

 

 

 

 

 

 

 

One or more Output Fuses are open.

 

 

 

 

 

 

 

 

(because of capacitance in the system it

Inverter Fuse

Inverter Fuse

 

 

 

 

 

may take up to 1 minute after a fuse failure

Fault

YES

YES

NO

YES

to detect this fault). The system will transfer

Fail

 

Fail

 

 

 

 

 

 

the load to Static Bypass if available and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then shut down the UPS. Contact Liebert

 

 

 

 

 

 

 

 

Global Services Immediately.

 

 

 

 

 

 

 

 

The UPS module output voltage is above

 

 

 

 

 

 

 

 

the maximum (+10%) deviation from

Output Ov

 

Output

 

 

 

 

 

nominal. The load automatically transfers to

 

Overvolt

Fault

NO

YES

YES

YES

the bypass line. The UPS module is shut

xfer

 

 

Transfer

 

 

 

 

 

down and isolated. Contact Liebert Global

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Services at once. Do not attempt to reset

 

 

 

 

 

 

 

 

circuit breakers.

 

 

 

 

 

 

 

 

The UPS module output voltage is under

 

 

 

 

 

 

 

 

the minimum (-12%) deviation from

 

 

Output

 

 

 

 

 

nominal. The load automatically transfers to

Output Uv

 

 

 

 

 

 

the bypass line. If the alarm condition is no

 

Undervolt

Fault

NO

YES

YES

YES

xfer

 

longer present, reset the alarm and

 

Transfer

 

 

 

 

 

 

 

 

 

 

 

 

retransfer the load from bypass to UPS.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact Liebert Global Services if alarm

 

 

 

 

 

 

 

 

persists.

 

 

 

 

 

 

 

 

This fault can only be detected when the

 

 

 

 

 

 

 

 

load is on bypass. One or more of the Static

SBS SCR

 

SBS SCR

 

 

 

 

 

Bypass phases are open. The static switch

 

Fault

YES

YES

NO

YES

will be shut down and the UPS will shut

Open

 

Open

 

 

 

 

 

 

down. Power to the load will be lost.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact Liebert Global Services

 

 

 

 

 

 

 

 

Immediately.

 

 

 

 

 

 

 

 

The system has detected a shorted SCR in

 

 

 

 

 

 

 

 

the Bypass line. If the unit is in the start-up

 

 

 

 

 

 

 

 

mode, start- up will be inhibited. If the unit is

SBS SCR

 

SBS SCR

Fault

YES

YES

NO

YES

on UPS, the unit will transfer to Bypass and

Shorted

 

Shorted

open the output contactor to prevent back

 

 

 

 

 

 

 

 

 

 

 

 

 

 

feed to the inverter from the Bypass line.

 

 

 

 

 

 

 

 

Contact Liebert Global Services

 

 

 

 

 

 

 

 

Immediately.

76

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Image 84
Liebert 30-130kVA manual Excess load from the UPS and attempt to