Danfoss VACON NXS Series Operating Manual page 206

Operating Guide | VACON® NXS/NXP Air-cooled
12.10.30 Fault 8 - System fault, Subcode S39 - OPTAF: Test pulse is not detected in STO channel 2
Cause
Single hardware problem detected in Safe Disable inputs.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.31 Fault 8 - System fault, Subcode S40 - OPTAF: ASIC trip ETR is not set, even if STO channel 1
is active
Cause
Single hardware problem detected in Safe Disable inputs.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.32 Fault 8 - System fault, Subcode S41 - OPTAF: STO channels are not active when the
thermistor trip is active
Cause
Single hardware problem detected in the thermistor input.
Troubleshooting
Change the OPTAF board.
12.10.33 Fault 8 - System fault, Subcode S42 - OPTAF: Test pulse low is not detected on thermistor
Cause
Single hardware problem detected in the thermistor input.
Troubleshooting
Change the OPTAF board.
12.10.34 Fault 8 - System fault, Subcode S43 - OPTAF: Test pulse high is not detected on thermistor
Cause
Single hardware problem detected in the thermistor input.
206 | Danfoss A/S © 2020.02
Specifications
AQ275638903263en-000301 / DPD00910