Danfoss FC 102 Operating Manual page 73

Maintenance, Diagnostics, a...
ALARM 244, Heat Sink temperature
The maximum temperature of the heat sink has been
exceeded. The temperature fault cannot reset until the
temperature drops below a 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 conditions:
•
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.
WARNING 251, New typecode
The power card or other components are replaced, and the
type code has changed.
ALARM 421, Temperature fault
A fault caused by the on-board temperature sensor is
detected on the fan power card.
Troubleshooting
•
Check wiring.
•
Check sensor.
•
Replace fan power card.
ALARM 423, FPC updating
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 A424 and A425.
ALARM 424, FPC update successful
This alarm is generated when the control card has
successfully updated the fan power card PUD. The drive
must be reset to stop the alarm.
ALARM 425, FPC update failure
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.
ALARM 426, FPC config
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.
MG16O102
Operating Guide
ALARM 427, FPC supply
Supply voltage fault (5 V, 24 V, or 48 V) on fan power card
is detected.
Troubleshooting
•
•
Danfoss A/S © 01/2017 All rights reserved.
Check fan power card wiring.
Replace fan power card.
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