Danfoss D9h Operating Manual page 157

VLT® AutomationDrive FC 302
Operating Guide
9.4.94 ALARM 244, Heat Sink Temperature
Cause
The maximum temperature of the heat sink has been exceeded. The temperature fault cannot reset until the temperature drops
below the defined heat sink temperature. The trip and reset points are different based on the power size. This alarm is equivalent to
Alarm 29, Heat Sink Temp.
Troubleshooting
Check for the following:
• Ambient temperature too high.
• Motor cables too long.
• Incorrect airflow clearance above or below the AC drive.
• Blocked airflow around the unit.
• Damaged heat sink fan.
• Dirty heat sink.
9.4.95 WARNING 251, New Typecode
Cause
The power card or other components have been replaced, and the typecode has changed.
9.4.96 ALARM 421, Temperature Fault
Cause
A fault caused by the on-board temperature sensor is detected on the fan power card.
Troubleshooting
• Check wiring.
• Check the on-board temperature sensor.
• Replace fan power card.
9.4.97 ALARM 423, FPC Updating
Cause
The alarm is generated when the fan power card reports it has an invalid PUD. The control card attempts to update the PUD. A
subsequent alarm can result depending on the update. See Alarm 424, FPC Update Successful and Alarm 425 FPC Update Failure.
9.4.98 ALARM 424, FPC Update Successful
Cause
This alarm is generated when the control card has successfully updated the fan power card PUD.
Troubleshooting
• Press [Reset] to stop the alarm.
9.4.99 ALARM 425, FPC Update Failure
Cause
This alarm is generated after the control card failed to update the fan power card PUD.
Troubleshooting
• Check the fan power card wiring.
• Replace fan power card.
• Contact supplier.
9.4.100 ALARM 426, FPC Config
Cause
The number of found fan power cards does not match the number of configured fan power cards. See parameter group 15-6* Option
Ident for the number of configured fan power cards.
Troubleshooting
• Check fan power card wiring.
• Replace fan power card.
Danfoss A/S © 2021.10
Maintenance, Diagnostics, and
Troubleshooting
AQ262139143212en-000301 / 130R0879 | 157