LEGRAND KEOR HPE 60 kVA Operating Manual page 1277

Alarm A24
Description High temperature of the heat sink on the inverter bridge or tripping of the DC
fuses which protect the inverter bridge.
Possible
causes
Solutions
Alarm A25
Description The inverter is blocked due an operation failure.
Possible
causes
Solutions
Alarm A26
Description Internal error.
Possible
causes
Solutions
Alarm A27
Description The controller has detected an error in the parameters stored in EEPROM.
Possible
causes
Solutions
Alarm A28
Description An alarm has been activated which causes the shutdown of part of the UPS
(rectifier, inverter, static switch).
Possible
causes
Solutions
52 OMW07104 REV. A
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
HIGH TEMPERATURE
 Fault of the heat sink cooling fans.
 The room temperature or cooling air temperature is too high.
 Tripping of the DC protection fuses.
Check the fans operation.
Clean the ventilation grids and the air filters, if any.
Check the air conditioning system (if present).
Check the status of the DC fuses on the inverter bridge input.
If the alarm persists, contact our Technical Support Service.
INVERTER OFF
 Various.
Reset the system.
If the alarm persists, contact our Technical Support Service.
COMMUNIC ERROR
 Microcontroller communication problems.
If the alarm persists, contact our Technical Support Service.
EEPROM ERROR
 Wrong parameters entered during programming.
Contact our Technical Support Service.
CRITICAL FAULT
 System failure.
Check which alarms are present and carry out the indicated
procedures.
If the alarm persists, contact our Technical Support Service.