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Software has detected too many missing pulses in the encoder. Closed loop control is switched to sensorless open loop control.
Troubleshooting
Do a check of the encoder.
Do a check of the encoder cable, cable shield, and grounding of the cable shield.
Do a check of the mechanical mounting of the encoder.
Do a check of the encoder parameters.
12.10.118 Fault 44 - Device changed (different type), Subcode S1 - Control board
Cause
Option board or power unit changed.
New device of different type or different power rating.
Troubleshooting
Reset.
If option board was changed, set the option board parameters again.
If power unit was changed, set AC drive parameters again.
12.10.119 Fault 45 - Device added (different type), Subcode S1 - Control board
Cause
Option board of different type added.
Troubleshooting
Reset.
Set the power unit parameters again.
12.10.120 Fault 49 - Division by zero in application
Cause
Division by zero has occurred in application program.
Troubleshooting
If the fault shows again while the AC drive is in run state, ask instructions from the local distributor.
For an application programmer: do a check of the application program.
12.10.121 Fault 50 - Analogue input Iin < 4 mA (sel. signal range 4 to 20 mA)
Cause
Current at the analog input is < 4 mA.
Control cable is broken or loose
signal source has failed.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
Do a check of the current loop circuitry.
12.10.122 Fault 51 - External fault
Cause
Digital input fault.
Digital input has been programmed as external fault input and this input is active.
Troubleshooting
Check the programming.
Check the device which the error message indicates.
Check the cabling for the respective device.
12.10.123 Fault 52 - Keypad communication fault
Cause
The connection between the control panel (or VACON
®
NCDrive) and the drive is defective.
AQ275638903263en-000601 / DPD00910 | 191
Danfoss A/S © 2022.12
Specifications
VACON® NXS/NXP Air-cooled
Operating Guide
