AUXILIARY SWITCH FAULT
UnclassifiedSensors
What This Code Means
Audible alarm sounds; Controller is unable to determine the transfer switch position
Possible Causes
- •Position-indicating contacts indicate ATS position changed when controller did not send a signal to transfer
- •Both auxiliary switches are open or closed
Suggested Actions
- 1Reset the controller to clear the fault condition (press and hold the test and exercise pushbuttons simultaneously to clear fault and silence alarm)
Related Rehlko Fault Codes
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Get a diagnosis walkthrough for AUXILIARY SWITCH FAULT on your specific Rehlko unit — cited to the OEM manual, not a forum guess.
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