Danfoss vlt series Operating Instructions Manual page 89

Warnings and Alarms
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 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 the fan resistance.
•
Check the soft charge fuses.
•
Check the IGBT thermal sensor.
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 perform installation, start-up, and maintenance
by qualified personnel 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 perform installation, start-up, and maintenance
by qualified personnel can result in death or serious
injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the power from the frequency converter
and check motor phase V.
MG34Q402
Operating Instructions
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 perform installation, start-up, and maintenance
by qualified personnel 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 36, Mains failure
This warning/alarm is only active if the supply voltage to
the frequency converter is lost and parameter 14-10 Mains
Failure is not set to [0] No Function.
Troubleshooting
•
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
Table 6.1 is shown.
Troubleshooting
•
•
•
It may be necessary to contact Danfoss Service or the
supplier. Note the code number for further troubleshooting
directions.
Number
0
256–258
512
513
514
515
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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 frequency converter and
mains supply to the unit.
Cycle the 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.
The power EEPROM data is defective or too old.
The 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.
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