Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual page 71

Warnings and Alarms
ALARM 29, Heat Sink temp
The maximum temperature of the heat sink has been
exceeded. The temperature fault resets when the
temperature falls below a defined heat sink temperature.
The trip and reset points are different based on the
frequency converter power size.
Troubleshooting
Check for the following conditions.
Ambient temperature too high.
Motor cables too long.
Incorrect airflow clearance above and below the
frequency converter
Blocked airflow around the frequency converter.
Damaged heat sink fan.
Dirty heat sink.
For the D, E, and F enclosures, this alarm is based on the
temperature measured by the heat sink 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 frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase V.
ALARM 32, Motor phase W missing
Motor phase W between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase W.
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time
period. Let the unit cool to operating temperature.
WARNING/ALARM 34, Fieldbus communication fault
The fieldbus 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 frequency converter is lost and 14-10 Mains Failure is
not set to [0] No Function. Check the fuses to the
frequency converter and mains supply to the unit.
MG34U302
Operating Instructions
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
Table 9.3 is displayed.
Troubleshooting
It may be necessary to contact Danfoss service or the
supplier. Note the code number for further trouble-
shooting directions.
No.
0
256–258
512
513
514
515
516
517
518
519
783
1024–1279 A CAN telegram that has to be sent could not be
1281
1282
1283
1284
1299
1300
1301
1302
1315
1316
1317
1318
1379
1380
1381
1382
1536
Danfoss A/S © Rev. 2014-02-20 All rights reserved.
Cycle power
Check that the option is properly installed
Check for loose or missing wiring
Text
Serial port cannot be initialised. 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 time-out reading EEPROM data
Communication time-out reading EEPROM data
Application-oriented control cannot recognise the
EEPROM data.
Cannot write to the EEPROM because a write
command is on progress.
Write command is under time-out
Failure in the EEPROM
Missing or invalid barcode data in EEPROM
Parameter value outside of min/max limits
sent.
Digital signal processor flash time-out
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)
Option SW in slot C1 is not supported (not
allowed)
Option A did not respond when calculating
platform version
Option B did not respond when calculating
platform version
Option C0 did not respond when calculating
platform version.
Option C1 did not respond when calculating
platform version.
An exception in the application-oriented control is
registered. Debug information written in LCP.
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