Danfoss VACON NX FI6 Operating Manual page 133

Operating Guide | VACON® NX Inverters FI4-FI8
12.10.28 Fault 8 - System fault, Subcode S38 - OPTAF: Test pulse is not detected in STO channel 1
Cause
Single hardware problem detected in Safe Disable inputs.
Troubleshooting
• Change the OPTAF board.
• Change the control board.
12.10.29 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.
12.10.30 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.
12.10.31 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.
12.10.32 Fault 8 - System fault, Subcode S42 - OPTAF: Test pulse low is not detected on thermistor
Cause
Single hardware problem detected in the thermistor input.
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Specifications
AQ299433367205en-000101 / DPD00908| 133