Rehlko

AUXILIARYSWITCHOPEN

UnclassifiedTransfer Switch

What This Code Means

ATS is in neither position (all inputs are open)

Possible Causes

  • •Controller cannot determine the transfer switch position
  • •Main shaft auxiliary switches indicate all inputs open
  • •Transfer switch in intermediate position

Suggested Actions

  1. 1Check the control contact operation.
  2. 2Check wiring and connections to position microswitches. See the schematic drawing for connections.
  3. 3Inspect for signs of coil damage or overheating and replace coil if necessary.
  4. 4Manually operate the transfer switch, following safety precautions and instructions for your model.
  5. 5Perform manual reset
  6. 6Test position microswitch operation. Replace microswitch if necessary.

Related Rehlko Fault Codes

BUSLIVEDEADCHECK MODULE SETUP TO CLEAR FAULTATS COMERRORCONTACTOROKATSFFAIL TO OPEN SOURCE1FAIL TO OPEN SOURCE2FORCEDTRANSTOOFFGENLIMITSWITCHFAILGENSWITCHINGDEVICEFAILEDINHIBITTRANSFER
Browse all Rehlko fault codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for AUXILIARYSWITCHOPEN on your specific Rehlko unit — cited to the OEM manual, not a forum guess.

GET THE ANSWER

Free account required — we'll bring your question with you.