Danfoss Vacon OPTEA Operating Manual page 159

VACON® NXP Advanced Safety Options
Operating Guide
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.
Danfoss A/S © 2021.06
Fault Tracing
AQ319736045637en-000101 / DPD01798 | 159