LEGRAND KEOR HPE 60 kVA Operating Manual page 1276

Alarm A19
Description The output isolator is open.
 Output isolator open.
Possible
causes
Solutions
Alarm A20
Description The current sensor has detected an overload at the output. If the alarm
persists, the thermal image protection will be activated (alarm A21).
 Output overload.
Possible
causes
 Measuring circuit failure.
Solutions
Alarm A21
Description The thermal image protection has been activated after an extended inverter
overload. The inverter is shut down for 30 minutes and then restarted.
 Output overload.
Possible
causes
 Measuring circuit failure.
Solutions 1. Check the loads connected to the UPS output.
2. Should you need to restore the inverter supply immediately, reset the
3. If the alarm persists, contact our Technical Support Service.
Alarm A22
Description The "Normal/Bypass" selector has been operated.
 Maintenance operation.
Possible
causes
Solutions
Alarm A23
Description The system is blocked due to the activation of the emergency power off
button.
 Activation of the (local or remote) emergency power off button.
Possible
causes
Solutions
Manuel de l'utilisateur de l'ASI
OCB OPEN
Check the status of the output isolator.
Check the functionality of the auxiliary contact of the isolator.
If the alarm persists, contact our Technical Support Service.
OVERLOAD
Check the loads connected to the UPS output.
Contact our Technical Support Service.
THERMAL IMAGE
system.
BYPASS SWITCH
Check the selector position.
If the alarm persists, contact our Technical Support Service.
EPO PRESSED
Release the emergency power off button and reset the alarm.
If the alarm persists, contact our Technical Support Service.
UPS user manual
Utilizzo dell'UPS
OMW07104 REV.A 51