Rehlko

FAIL TO OPEN SOURCE1

UnclassifiedTransfer Switch

What This Code Means

Fail to Open Source1 fault message displays on the ATS controller; Fail to Open Source2 fault message displays on the ATS controller; Standby and utility sources remain paralleled for longer than the acceptable time (typically 100 ms)

Possible Causes

  • •One source fails to disconnect within the set time
  • •Source disconnect problem

Suggested Actions

  1. 1Identify and correct the cause of the source disconnect problem before resetting the fault

Related Rehlko Fault Codes

FAIL TO OPEN SOURCE2PROTECTIVERELAYTRIPPEDCONTACTORCONTACTOROKBUSLIVEDEADATS COMERRORFAULTFAIL TO ACQUIRE STANDBYFAULTSFAIL TO ACQUIREFREQUENCY HIGHF4
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Get a diagnosis walkthrough for FAIL TO OPEN SOURCE1 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.

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