Danfoss VLT AutomationDrive FC 302 Instruction Manual page 57

Maintenance, Diagnostics an...
Troubleshooting
•
Remove power to the adjustable frequency drive
and remove the brake resistor.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Check parameter 2-15 Brake Check.
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.
WARNING/ALARM 34, Fieldbus communication fault
The serial communication bus on the communication
option card is not working.
WARNING/ALARM 35, Option fault
An option alarm is received. The alarm is option-specific.
The most likely cause is a power-up or a communication
fault.
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 37, Phase imbalance
There is a current imbalance between the power units.
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
Table 7.4 is displayed.
MG34U422
Instruction Manual
Troubleshooting
•
•
•
It may be necessary to contact the Danfoss supplier or
service department. Note the code number for further
troubleshooting directions.
Number
0
256–258
512–519
783
1024–1284 Internal fault. Contact the Danfoss supplier or the
1299
1300
1302
1315
1316
1318
1379–2819 Internal fault. Contact the Danfoss supplier or
1792
1793
1794
1795
1796
2561
2820
2821
2822
3072–5122 Parameter value is outside its limits.
5123
5124
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Cycle power.
Check that the option is properly installed.
Check for loose or missing wiring.
Text
The serial port cannot be initialized. Contact the
Danfoss supplier or Danfoss Service Department.
The power EEPROM data is defective or too old.
Replace the power card.
Internal fault. Contact the Danfoss supplier or
Danfoss Service Department.
Parameter value outside of minimum/maximum
limits.
Danfoss Service Department.
The option software in slot A is too old.
The option software in slot B is too old.
The option software in slot C1 is too old.
The option software in slot A is not supported (not
allowed).
The option software in slot B is not supported (not
allowed).
The option software in slot C1 is not supported
(not allowed).
Danfoss Service Department.
HW reset of DSP.
Motor-derived parameters not transferred correctly
to the DSP.
Power data not transferred correctly at power-up
to the DSP.
The DSP has received too many unknown SPI
messages.
The adjustable frequency drive also uses this fault
code if the MCO does not power up correctly, for
example, due to poor EMC protection or improper
grounding.
RAM copy error.
Replace the control card.
LCP stack overflow.
Serial port overflow.
USB port overflow.
Option in slot A: Hardware incompatible with the
control board hardware.
Option in slot B: Hardware incompatible with the
control board hardware.
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