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12.2.52 Fault Code 20 - Safety System, S53 – Prox. sensor, Fault Number 4
Cause
When two proximity sensors are used: the signals of the proximity sensor have a different frequency.
Troubleshooting
Check the proximity sensors.
12.2.53 Fault Code 20 - Safety System, S53 – Prox. sensor, Fault Number 5
Cause
The supported operating frequency for the proximity sensor 1 was exceeded.
Troubleshooting
Check the parameters.
Check the proximity sensor.
12.2.54 Fault Code 20 - Safety System, S53 – Prox. sensor, Fault Number 6
Cause
The supported operating frequency for the proximity sensor 2 was exceeded.
Troubleshooting
Check the parameters.
Check the proximity sensor.
12.2.55 Fault Code 20 - Safety System, S53 - Prox. Sensor, 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.
12.2.56 Fault Code 20 - Safety System, S54 – Estimated Sp, Fault Number 1
Cause
Estimated speed difference exceeded (Allowed Deviation of Speed Sources, Speed Deviation Timer).
The rotation direction of the estimated speed and the encoder are opposite.
Troubleshooting
Check the encoder and estimated speed parameters.
Check the cabling (motor phases and encoder signals) to make sure that it does not cause one of the directions to reverse.
12.2.57 Fault Code 20 - Safety System, S65 - PROFIsafe, Fault Number 4
Cause
The PROFIsafe telegram is commanding the drive to a fail-safe state.
The watchdog time was exceeded.
Troubleshooting
Check the F-parameters in the option board and the safety PLC.
AQ319736045637en-000101 / DPD01798 | 159Danfoss A/S © 2021.06
Fault Tracing
VACON® NXP Advanced Safety Options
Operating Guide
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