Danfoss VACON NXS Series Operating Manual page 207

Operating Guide | VACON® NXS/NXP Air-cooled
Troubleshooting
Change the OPTAF board.
12.10.35 Fault 8 - System fault, Subcode S44 - OPTAF: STO channel 1 is not active, even if the analog
input supervision indicates
Cause
Single hardware problem detected in Safe Disable inputs or in the thermistor input.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.36 Fault 8 - System fault, Subcode S45 - OPTAF: STO channel 2 is not active, even if the analog
input supervision indicates
Cause
Single hardware problem detected in Safe Disable inputs or in the thermistor input.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.37 Fault 8 - System fault, Subcode S46 - OPTAF: Thermistor or analog input is not set, even if
STO is active
Cause
Single hardware problem detected in Safe Disable inputs or in the thermistor input.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.38 Fault 8 - System fault, Subcode S47 - OPTAF: Board mounted in old NXP control board with
no safety hardware
Cause
OPTAF board mounted in old VACON
Troubleshooting
Change the control board to VB00561 revision H or newer.
Danfoss A/S © 2020.02
®
NXP control board, which is not equipped with the Safe Disable function.
Specifications
AQ275638903263en-000301 / DPD00910| 207