Drives Service & Support
Fault Number: 47
Fault Display: Xsistr Desat Flt
Fault Name: Transistor Desaturation Fault
Description: One or more of the output transistors were operating in the active region instead of desaturation.
Corrective Action: This can be caused by excessive transistor current or insufficient base drive voltage. This is applicable on frame C & above only.
To start troubleshooting, transistor firing voltage is typically too low, so base driver board will need to be replaced. This will typically solve this fault from occuring. If this does not cure the fault, replace the power modules.
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