Danfoss D9h Operating Manual page 148

VLT® AutomationDrive FC 302
Operating Guide
9.4.32 ALARM 33, Inrush Fault
Cause
Too many power-ups have occurred within a short time period.
Troubleshooting
• Let the unit cool to operating temperature.
• Check potential DC-link fault to ground.
9.4.33 WARNING/ALARM 34, Fieldbus Communication Fault
Cause
The fieldbus on the communication option card is not working.
9.4.34 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.
9.4.35 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 Func-
tion.
Troubleshooting
• Check the fuses to the drive and mains supply to the unit.
9.4.36 ALARM 37, Phase Imbalance
Cause
There is a current imbalance between the power units.
9.4.37 ALARM 38, Internal Fault
Cause
When an internal fault occurs, a code number defined in
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 direc-
tions.
Table 99: 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.
1024–1284 Internal fault. Contact the Danfoss supplier or Danfoss service department.
1299 The option software in slot A is too old.
1300 The option software in slot B is too old.
1302 The option software in slot C1 is too old.
1315 The option software in slot A is not supported/allowed.
148 | Danfoss A/S © 2021.10
Table 99 is shown.
Maintenance, Diagnostics, and
Troubleshooting
AQ262139143212en-000301 / 130R0879