Danfoss VACON NXS Series Operating Manual page 204

Operating Guide | VACON® NXS/NXP Air-cooled
12.10.21 Fault 8 - System fault, Subcode S30 - OPTAF: STO channels are different from each other
Cause
The Safe Disable inputs are in different states. It is not allowed according to EN954-1, category 3. This fault occurs when the Safe
Disable inputs are in different states for more than 5 s.
Troubleshooting
• Check the S1 switch.
• Check the cabling to the OPTAF board.
• If the fault shows again, ask instructions from the local distributor.
12.10.22 Fault 8 - System fault, Subcode S31 - OPTAF: Thermistor short circuit detected
Cause
Thermistor short circuit detected.
Troubleshooting
• Correct the cable connections.
• Check the jumper for the thermistor short circuit supervision, if the thermistor function is not used and the thermistor input is
short-circuited.
12.10.23 Fault 8 - System fault, Subcode S32 - OPTAF board has been removed
Cause
OPTAF board has been removed. It is not allowed to remove the OPTAF board once the software has recognized it.
Troubleshooting
The system requires a manual acknowledgement using System menu parameter 6.5.5 OPTAF Remove. Ask help from the local
distributor.
12.10.24 Fault 8 - System fault, Subcode S33 - OPTAF: EEPROM error
Cause
OPTAF board EEPROM error (checksum, not answering and so on).
Troubleshooting
Change the OPTAF board.
12.10.25 Fault 8 - System fault, Subcode S34 - OPTAF: Voltage problem
Cause
OPTAF supply voltage hardware problem detected.
204 | Danfoss A/S © 2020.02
Specifications
AQ275638903263en-000301 / DPD00910