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12.2.40 Fault Code 20 - Safety System, S48 – Enc. Common, Fault Number 14
Cause
The types of the parameterized and the actual encoder interface board do not match.
Troubleshooting
Check the parameters.
Check the type of the encoder interface board.
12.2.41 Fault Code 20 - Safety System, S48 – Enc. Common, Fault Number 15
Cause
When you use two speed measurement sources: the sources indicate different speeds for the motor.
Troubleshooting
Check the speed sensor parameters.
Check the speed sensors.
12.2.42 Fault Code 20 - Safety System, S48 – Enc. Common, Fault Number 18
Cause
Proof test interval was exceeded. The motor has not been rotated during a 30 day period.
Troubleshooting
Make the motor rotate according to the instructions in 3.6.6 Encoder Signal Verification.
12.2.43 Fault Code 20 - Safety System, S48 – Enc. Common, Fault Number Other
Cause
Faults related to the encoder.
A wrong phase shift between signals.
Discrepancy between different speed sources is too high.
Troubleshooting
Check the encoder connections.
Check the encoder parameters.
Check the encoder.
Reboot the AC drive.
If the fault reoccurs, contact the nearest distributor.
12.2.44 Fault Code 20 - Safety System, S49 – Sin-Cos enc., Fault Number 1–3
Cause
A fault detected in the encoder signal monitoring. Example: the signals do not fulfill the equation Sin
2
x +cos
2
x = 1.
Troubleshooting
Check the encoder connections.
Check the encoder.
12.2.45 Fault Code 20 - Safety System, S49 - Sin-Cos Enc., Fault Number Other
Cause
Faults related to the encoder.
A wrong phase shift between signals.
Discrepancy between different speed sources is too high.
Troubleshooting
Check the encoder connections.
Check the encoder parameters.
Check the encoder.
AQ319736045637en-000101 / DPD01798 | 157Danfoss A/S © 2021.06
Fault Tracing
VACON® NXP Advanced Safety Options
Operating Guide
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