Front panel
OM226131 Rev. A 5
2.2 ALARMS AND OPERATING STATUS
The alphanumeric display offers a complete diagnostic of the system by showing 25
alarms and 6 operating status descriptions.
Each alarm is associated to a code that allows it to be stored in the events history.
A1 MAINS FAULT = Rectifier input mains failure
Possible causes: 1) Central system black-out (mains failure)
2) Distribution problems upstream of the UPS
3) RCB open
A2 CHARGER FAULT = Battery charger failure
A3 RECT FUSE = One or more rectifier fuses are blown
A4 THER IMAGE = Load transferred to mains due to overload. After 30’
the load is transferred back to inverter
A5 AC/DC FAULT = Rectifier output voltage out of tolerance
Possible causes: 1) Mains input voltage too high/low
2) Distribution problems upstream of the UPS
3) RCB open
4) Rectifier bridge failure
A6 INPUT WR SEQ = Input phase rotation not correct
A7 BCB OPEN = Battery circuit breaker open
A8 BATT DISCH = The battery is discharging
Possible causes: 1) Rectifier input mains failure (alarm A1 present)
2) Rectifier failure
A9 BATT AUT END = Battery autonomy (calculated) has expired
A10 BATT FAULT = Battery test failed
Possible causes: 1) The test has been carried out with the battery not
perfectly charged
2) One or more battery cells are damaged
A11 BATT IN TEST = Battery test in progress
A12 PLL FAULT = Problems with the digital synchronisation system
Possible causes: 1) Emergency mains excessively disturbed or
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