Danfoss VLT FC 102 Operating Instructions Manual page 175

VLT HVAC Low Harmonic Drive Operating In-
structions
the frequency converter cuts out and issues this alarm, when the dissi-
pated braking power is higher than 100%.
WARNING/ALARM 27, Brake chopper fault
The brake transistor is monitored during operation and if it short-circuits,
the brake function disconnects and issues a warning. The frequency con-
verter is still able to run, but since the brake transistor has short-circuited,
substantial power is transmitted to the brake resistor, even if it is inactive.
Turn off the frequency converter and remove the brake resistor.
This alarm/ warning could also occur should the brake resistor overheat.
Terminal 104 to 106 are available as brake resistor. Klixon inputs, see
section Brake Resistor Temperature Switch.
WARNING/ALARM 28, Brake check failed
Brake resistor fault: the brake resistor is not connected or not working.
Brake Check .
Check par. 2-15
ALARM 29, Heatsink temp
The maximum temperature of the heatsink has been exceeded. The tem-
perature fault will not be reset until the temperature falls below a defined
heatsink temperature. The trip and reset point are different based on the
drive power size.
Troubleshooting:
Ambient temperature too high.
Too long motor cable.
Incorrect clearance above and below the drive.
Dirty heatsink.
Blocked air flow around the drive.
Damaged heatsink fan.
For the D, E, and F Frame Drives, this alarm is based on the temperature
measured by the heatsink sensor mounted inside the IGBT modules. For
the F Frame drives, this alarm can also be caused by the thermal sensor
in the Rectifier module.
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 miss-
ing.
Turn off 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.
Turn off 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 miss-
ing.
Turn off the frequency converter and check motor phase W.
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time period. Let unit
cool to operating temperature.
WARNING/ALARM 34, Fieldbus communication fault
The fieldbus on the communication option card is not working.
WARNING/ALARM 35, Out of frequency range:
This warning is active if the output frequency has reached the high limit
(set in par. 4-53) or low limit (set in par. 4-52). In
Loop (par. 1-00) this warning is displayed.
WARNING/ALARM 36, Mains failure
This warning/alarm is only active if the supply voltage to the frequency
converter is lost and par. 14-10
the fuses to the frequency converter
ALARM 38, Internal fault
It may be necessary to contact your Danfoss supplier. Some typical alarm
messages:
256-258
512
513
514
515
516
517
518
519
783
1024-1279 A can-telegram that has to be sent, couldn't be sent
1281
1282
1283
1284
1299
1300
1301
1302
1315
1316
1317
1318
1379
1380
1381
1382
1536
®
MG.16.A1.02 - VLT is a registered Danfoss trademark
Mains Failure is NOT set to OFF. Check
0 Serial port cannot be initialized. Serious hardware fail-
ure
Power EEPROM data is defect or too old
Control board EEPROM data is defect or too old
Communication time out reading EEPROM data
Communication time out reading EEPROM data
Application Orientated Control cannot recognize 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
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)
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 Orientated Control is
registered. Debug information written in LCP
9 Troubleshooting
Process Control, Closed
9
175