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Replace the control card.
Parameter value is outside its limits.
Option in slot A: Hardware incompatible with the control board hardware.
Option in slot B: Hardware incompatible with the control board hardware.
Option in slot C0: Hardware incompatible with the control board hardware.
Option in slot C1: Hardware incompatible with the control board hardware.
Internal fault. Contact the Danfoss supplier or Danfoss service department.
9.4.37 ALARM 39, Heat Sink Sensor
Cause
There is no feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not available on the power card.
Troubleshooting
Check the ribbon cable between the power card and the gate drive card.
Check for a defective power card.
Check for a defective gate drive card.
9.4.38 WARNING 40, Overload of Digital Output Terminal 27
Troubleshooting
Check the load connected to terminal 27 or remove the short-circuit connection.
Check parameter 5-00 Digital I/O Mode and parameter 5-01 Terminal 27 Mode.
9.4.39 WARNING 41, Overload of Digital Output Terminal 29
Troubleshooting
Check the load connected to terminal 29 or remove the short-circuit connection.
Check parameter 5-00 Digital I/O Mode and parameter 5-02 Terminal 29 Mode.
9.4.40 WARNING 42, Ovrld X30/6-7
Troubleshooting
For terminal X30/6:
Check the load connected to the terminal, or remove the short-circuit connection.
Check parameter 5-32 Term X30/6 Digi out (MCB 101) (VLT® General Purpose I/O MCB 101).
For terminal X30/7:
Check the load connected to the terminal, or remove the short-circuit connection.
Check parameter 5-33 Term X30/7 Digi Out (MCB 101) (VLT® General Purpose I/O MCB 101).
AQ262141314214en-000301 / 130R0880 | 143Danfoss A/S © 2021.11
Maintenance, Diagnostics, and
Troubleshooting
VLT® HVAC Drive FC 102
Operating Guide
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