OM226142 rev C
24
4.1 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 with an internal
protection, controlled by the microprocessor, that disables certain UPS functions in order
to avoid possible load breaks.
Each alarm and status is associated to a code; the alarm codes are stored in the events
history.
The display management for the alarms and status, including the history log, is described
in the section 4.3.4.
4.1.1 Alarms
Code ALARM NAME
Description
A1 MAINS FAULT
= Rectifier input mains failure
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
A6 INPUT WR SEQ
= Input phase rotation not correct
A7 BCB OPEN
= Battery circuit breaker open
A8 BATT DISCH
= The battery is discharging
A9 BATT AUT END
= Battery autonomy (calculated) has expired
A10 BATT FAULT
= Battery test failed or intervention of the safety timer
during boost charge
A11 BATT IN TEST
= Battery test in progress
A12 PLL FAULT
= Problems with the digital synchronisation system
A13 INV OUT TOL
= Inverter output voltage out of tolerance
A14 OVERLOAD
= Inverter overload (load exceeding 100%). The thermal
image protection is started
A15 BYP FAULT
= Emergency mains not available
A16 BYP FEED LOAD
= Load fed by bypass
A17 RETR BLOCK
= Re-transfer between bypass and inverter blocked
A18 MBYP CLOSE
= Manual bypass breaker closed (inverter shutdown)
A19 OCB OPEN
= UPS output breaker open
A20 FANS FAILURE
= Optional
A21 HIGH TEMP
= High temperature on the inverter and/or rectifier bridge
A22 BYP SWITCH
= Closure of the commutation switch which forces the
load to bypass (maintenance)
A23 EPO BUS
= Intervention of the emergency power off switch
according to the EN62040-1
A24 CURR STOP
= Inverter bridge stop for max current
A25 SHORT CIRC
= Intervention of the short circuit protection (current
exceeding 200%)
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