Danfoss VLT AQUA Drive FC 202 Installation Manual page 73

Diagnostics and Troubleshoo...
ALARM 29, Heatsink temp
The maximum temperature of the heatsink has been
exceeded. The temperature fault resets when the
temperature falls below a defined heatsink temperature.
The trip and reset points are different based on the
adjustable frequency drive power size.
Troubleshooting
Check for the following conditions.
Ambient temperature too high.
Motor cables too long.
Incorrect airflow clearance above and below the
adjustable frequency drive
Blocked airflow around the adjustable frequency
drive.
Damaged heatsink fan.
Dirty heatsink.
For the D, E, and F enclosures, this alarm is based on the
temperature measured by the heatsink sensor mounted
inside the IGBT modules. For the F enclosures, the thermal
sensor in the rectifier module can also cause this alarm.
Troubleshooting
Check fan resistance.
Check soft charge fuses.
IGBT thermal sensor.
ALARM 30, Motor phase U missing
Motor phase U between the adjustable frequency drive
and the motor is missing.
Troubleshooting
•
Remove the power from the adjustable frequency
drive and check motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the adjustable frequency drive
and the motor is missing.
Troubleshooting
•
Remove the power from the adjustable frequency
drive and check motor phase V.
ALARM 32, Motor phase W missing
Motor phase W between the adjustable frequency drive
and the motor is missing.
Troubleshooting
•
Remove the power from the adjustable frequency
drive and check motor phase W.
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time
period.
Troubleshooting
•
Let the unit cool to operating temperature.
MG21B322
Installation Manual
WARNING/ALARM 34, Fieldbus communication fault
The serial communication bus on the communication
option card is not working.
WARNING/ALARM 36, Mains failure
This warning/alarm is only active if the supply voltage to
the adjustable frequency drive is lost and
parameter 14-10 Mains Failure is not set to option [0] No
Function. Check the fuses to the adjustable frequency drive
and line power supply to the unit.
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
Table 7.1 is displayed.
Troubleshooting
It may be necessary to contact Danfoss service or the
supplier. Note the code number for further troubleshooting
directions.
No.
0
256–258
512
513
514
515
516
517
518
519
783
1024–1279 A CAN message that has to be sent could not be
1281
1282
1283
1284
1299
1300
1301
1302
1315
1316
1317
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Cycle power
Check that the option is properly installed
Check for loose or missing wiring
Text
Serial port cannot be initialized. Contact your
Danfoss supplier or Danfoss Service Department.
Power EEPROM data is defective or too old
Control board EEPROM data is defective or too old.
Communication timeout reading EEPROM data
Communication timeout reading EEPROM data
Application-oriented control cannot recognize the
EEPROM data.
Cannot write to the EEPROM because a write
command is on progress.
Write command is under timeout
Failure in the EEPROM
Missing or invalid barcode data in EEPROM
Parameter value outside of min/max limits
sent.
Digital signal processor flash timeout
Power micro software version mismatch
Power EEPROM data version mismatch
Cannot read digital signal processor software
version
Option SW in slot A is too old
Option SW in slot B is too old
Option SW in slot C0 is too old
Option SW in slot C1 is too old
Option SW in slot A is not supported (not allowed)
Option SW in slot B is not supported (not allowed)
Option SW in slot C0 is not supported (not
allowed)
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