Danfoss VLT FC 102 Programming Manual page 287

Troubleshooting
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Troubleshooting
•
Check parameter 2-15 Brake Check.
ALARM 29, Heat sink temp
The maximum temperature of the heat sink is exceeded.
The temperature fault is not reset until the temperature
drops 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:
•
The ambient temperature is too high.
•
The motor cables are too long.
•
Incorrect airflow clearance above and below the
frequency converter.
•
Blocked airflow around the frequency converter.
•
Damaged heat sink fan.
•
Dirty heat sink.
ALARM 30, Motor phase U missing
Motor phase U between the frequency converter and the
motor is missing.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualified personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the 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.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualified personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the power from the frequency converter
and check motor phase V.
M0010001
Programming Guide
ALARM 32, Motor phase W missing
Motor phase W between the frequency converter and the
motor is missing.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualified personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Troubleshooting
•
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time
period.
Troubleshooting
•
WARNING/ALARM 34, Fieldbus communication fault
The fieldbus 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 drive is lost and parameter 14-10 Mains Failure is not
set to [0] No function.
Troubleshooting
•
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 4.10 is shown.
Troubleshooting
•
•
•
It may be necessary to contact the Danfoss supplier or
service department. Note the code number for further
troubleshooting directions.
Danfoss A/S © 10/2019 All rights reserved.
Disconnect power before proceeding.
Remove the power from the frequency converter
and check motor phase W.
Let the unit cool to operating temperature.
Check the fuses to the drive and mains supply to
the unit.
Cycle power.
Check that the option is properly installed.
Check for loose or missing wiring.
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