LEGRAND VR61-18 Manuel De L'utilisateur page 52

Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
52 OMP06145 REV. D
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
A21 THERMAL IMAGE
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.
➢ Measuring circuit failure.
1. Check the loads connected to the UPS output.
2. Should you need to restore the inverter supply immediately, reset
the system.
3. If the alarm persists, contact our Technical Support Service.
A22 BYPASS SWITCH
The "Normal/Bypass" selector has been operated.
➢ Maintenance operation.
1. Check the selector position.
2. If the alarm persists, contact our Technical Support Service.
A23 EPO PRESSED
The system is blocked due to the activation of the emergency power off
button.
➢ Activation of the (local or remote) emergency power off button.
1. Release the emergency power off button and reset the alarm.
2. If the alarm persists, contact our Technical Support Service.
A24 HIGH TEMPERATURE
High temperature of the heat sink on the inverter bridge or tripping of
the DC fuses which protect the inverter bridge.
➢ Fault of the heat sink cooling fans.
➢ The room temperature or cooling air temperature is too high.
➢ Tripping of the DC protection fuses.
1. Check the fans operation.
2. Clean the ventilation grids and the air filters, if any.
3. Check the air conditioning system (if present).
4. Check the status of the DC fuses on the inverter bridge input.
5. If the alarm persists, contact our Technical Support Service.