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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
®
NXP control board, which is not equipped with the Safe Disable function.
Troubleshooting
Change the control board to VB00561 revision H or newer.
12.10.39 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 7.2.1.1 Therm Trip (HW) to match the X12 jumper setting.
12.10.40 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.
12.10.41 Fault 8 - System fault, Subcode S50 - OPTAF: Filter discharge resistor fault
Cause
Problem with the control board.
Troubleshooting
Ask instructions from the local distributor.
12.10.42 Fault 8 - System fault, Subcode S70 - False fault activated
Cause
Fault in application.
Troubleshooting
Ask instructions from the local distributor.
12.10.43 Fault 9 - Undervoltage, Subcode S1 - DC-link too low during run
Cause
The DC-link voltage is lower than the limits.
Too low a supply voltage
AC drive internal fault
A defective input fuse
The external charge switch is not closed.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
If there is a temporary supply voltage break, reset the fault and start the drive again.
Do a check of the supply voltage. If the supply voltage is sufficient, there is an internal fault.
Ask instructions from the local distributor.
AQ275638903263en-000601 / DPD00910
178 | Danfoss A/S © 2022.12
Specifications
VACON® NXS/NXP Air-cooled
Operating Guide