Danfoss VLT AQUA Drive FC 202, Operating Manual

Page: 115 / 174

8.4.31 WARNING/ALARM 34, Fieldbus Communication Fault
Cause
The fieldbus on the communication option card is not working.
8.4.32 WARNING/ALARM 35, Option Fault
Cause
An option alarm is received. The alarm is option-specific. The most likely cause is a power-up or a communication fault.
8.4.33 WARNING/ALARM 36, Mains Failure
Cause
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
• Check the fuses to the drive and mains supply to the unit.
8.4.34 ALARM 37, Phase Imbalance
Cause
There is a current imbalance between the power units.
8.4.35 ALARM 38, Internal Fault
Cause
When an internal fault occurs, a code number defined in table 43 is shown.
Troubleshooting
• Cycle power.
• Check that the option is properly installed.
• Check for loose or missing wiring.
It may be necessary to contact the Danfoss supplier or service department. Note the code number for further troubleshooting
directions.
Table 43: Internal Fault Codes
Number Text
0 The serial port cannot be initialized. Contact the Danfoss supplier or Danfoss service department.
256-258 The power EEPROM data is defective or too old. Replace the power card.
512-519 Internal fault. Contact the Danfoss supplier or Danfoss service department.
783 Parameter value outside of minimum/maximum limits.
Maintenance, Diagnostics, and
Troubleshooting
Operating Guide | VLT® AQUA Drive FC 202
AQ275652274277en-000101 / 130R0708| 113
Danfoss A/S © 2020.01