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)

 

 

 

 

 

 

 

 

For all of these input problems the system

 

 

 

 

 

 

 

 

will supply power from the battery until the

Input

 

Input Over

 

 

 

 

 

end of discharge. At that point single input

 

Alarm

NO

NO

NO

YES

systems will lose power to the load. Dual

OverVoltage

 

Voltage

 

 

 

 

 

 

input systems will attempt to transfer to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bypass if qualified and available. Call

 

 

 

 

 

 

 

 

Liebert Global Services for Assistance.

Input current

 

Input Current

 

 

 

 

 

The RMS input current has reached the

 

Alarm

NO

YES

NO

YES

Input Current Limit setting. Check the UPS

limit

 

Limit

 

 

 

 

 

 

load.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The module battery circuit breaker (MBD) is

 

 

 

 

 

 

 

 

open. This circuit breaker might have been

 

 

 

 

 

 

 

 

opened either manually or automatically in

 

 

 

 

 

 

 

 

a UPS shutdown procedure. If the UPS is

Battery CB

 

Battery CB

 

 

 

 

 

operating with this breaker open, the critical

 

Alarm

NO

YES

NO

YES

load is not protected from loss of the utility

Open

 

Open

 

 

 

 

 

 

source power. Manual closure of the battery

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

breaker is inhibited. You must use the front

 

 

 

 

 

 

 

 

panel to set up the sequence for manual

 

 

 

 

 

 

 

 

battery re-closure. Follow the instructions in

 

 

 

 

 

 

 

 

manual start-up.

 

 

 

 

 

 

 

 

This condition is indicated when the Batt

 

 

Batt sup-

 

 

 

 

 

Discharging and Input Undervoltage alarms

Batt Supp

 

 

 

 

 

 

are simultaneously active. The alarm will

 

plement is

Alarm

NO

YES

NO

YES

Active

 

clear when the Inp. Undervoltage alarm

 

active

 

 

 

 

 

 

 

 

 

 

 

 

clears and/or if the rectifier turns off and/or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

if the Batt Dischg alarm clears.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The bypass is out of sync to a sufficient

 

 

 

 

 

 

 

 

degree that transfer to Static Bypass is

Bypass Sync

 

Bypass Sync

Alarm

NO

YES

NO

YES

inhibited. An interrupted transfer will be

Error

 

Error

permitted only in the case of a critical fault.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If this alarm persists, contact Liebert Global

 

 

 

 

 

 

 

 

Services.

 

 

 

 

 

 

 

 

One or more bypass voltages is below 80%

 

 

 

 

 

 

 

 

or above 115% of the nominal value. If the

 

 

 

 

 

 

 

 

load is on UPS, and the unit is a dual input

Byp out

 

Bypass

 

 

 

 

 

unit, transfers to bypass will be inhibited. If

 

Voltage Out of

Alarm

NO

YES

NO

YES

the unit is a single input unit, the system will

Tolerance

 

 

Tolerance

 

 

 

 

 

shut down. The Alarm will be cleared 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

seconds after all voltage are again with 85-

 

 

 

 

 

 

 

 

110% of nominal. If the load has been shut

 

 

 

 

 

 

 

 

down, re-start will be required.

 

 

 

 

 

 

 

 

The bypass source has dropped below 35V

 

 

 

 

 

 

 

 

per phase. On single input units, the UPS

 

 

 

 

 

 

 

 

will shut down. On dual input units, transfer

Bypass Line

 

Bypass Line

Alarm

NO

YES

NO

YES

to the bypass will be inhibited. The alarm

Fail

 

Fail

will be cleared five seconds after all

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltages again exceed 45V. If the unit is

 

 

 

 

 

 

 

 

already on Bypass when this occurs, power

 

 

 

 

 

 

 

 

to the load will be lost.

81

Page 89
Image 89
Liebert 30-130kVA manual RMS input current has reached