•
•
•
•
•
•
Troubleshooting
Change the OPTAF board.
11.1.36 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.
11.1.37 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.
11.1.38 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.
11.1.39 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
®
NXP control board, which is not equipped with the Safe Disable function.
Troubleshooting
Change the control board to VB00561 revision H or newer.
11.1.40 Fault 8 - System fault, Subcode S48 - OPTAF: Mismatch between Therm Trip (HW) parame-
ter and jumper setting
Cause
The parameter Expander boards/ SlotB/ Therm Trip(HW) is set to OFF even though the jumper X12 is not cut.
Troubleshooting
Correct the parameter P7.2.1.1 Therm Trip (HW) to match the X12 jumper setting.
11.1.41 Fault 8 - System fault, Subcode S49 - OPTAF: Board mounted in VACON NXS control board
Cause
OPTAF is only compatible with VACON
®
NXP.
Troubleshooting
Remove the OPTAF board.
11.1.42 Fault 8 - System fault, Subcode S50 - OPTAF: Filter discharge resistor fault
Cause
Problem with the control board.
Troubleshooting
Ask instructions from the local distributor.
AB296635287482en-000301 / DPD00903 | 333
Danfoss A/S © 2023.02
Fault Tracing
VACON® NX All-in-One
Application Guide
Summary of Contents for VACON NX
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