Front panel
Rev.B JSE410920 22/07/08 JUD408312
7 of 29
A19 OCB OPEN
= UPS output breaker open
A20 OVERLOAD
= Inverter overload (load exceeding 100%). The
thermal image protection is started
A21 THERMAL IMAGE
= Intervention of the electronic protection due to
excessive load
A22 BYPASS SWITCH
= Closure of the commutation switch which forces
the load to bypass (maintenance)
A23 EPO PRESSED
= Intervention of the emergency power off switch
according to the EN62040-1
It is possible, after having verified the status of the installation, to restart the UPS
by means of the front panel (see menu SPECIAL).
For an external EPO (Optional) the unit restart if the EPO push button is released.
A24 HIGH TEMPERATURE
= High temperature on the inverter and/or rectifier
bridge
Possible causes: 1) Excessive load
2) Failure or malfunctioning of the cooling system
3) Wrong positioning of the UPS (distance from walls,
altitude)
A25 INVERTER OFF
= The inverter has been switched off
A26 SSCI COM FAULT
= Internal alarm
A27 EEPROM ERROR
= Internal alarm
A28 UPS CRITICAL FAULT
= Internal alarm
Or of the Alarms A4-A5-A12-A13-A26-A27.
A29 MAINTENANCE REQ
= The programmed service timer has expired.
A30 COMMON ALARM
= One or more alarms are active
A33 ASYMMETRIC LOAD
= Check on “load asymmetry” (damage cables or
asymmetric load)
A34 SERVICE REQ
= Contact the Service Support
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