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Troubleshooting
Change the OPTAF board.
Change the control board.
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 ther-
mistor 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.
Troubleshooting
Change the OPTAF board.
12.10.35 Fault 8 - System fault, Subcode S44 - OPTAF: STO channel 1 is not active, even if the ana-
log 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 ana-
log 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.
AQ275638903263en-000601 / DPD00910 | 177
Danfoss A/S © 2022.12
Specifications
VACON® NXS/NXP Air-cooled
Operating Guide