1689
UnclassifiedGeneral
What This Code Means
Control displays event/fault code 1689; RTC (Real Time Clock) is no longer accurate
Possible Causes
- •Battery power lost for over 1 hour when battery is disconnected or dead
- •Power supplied to the control again
- •Power to the Real Time Clock (RTC) chip on the base board has been lost
- •RTC accuracy lost
Suggested Actions
- 1Acknowledge the fault (if the fault clears after being acknowledged, the control is OK)
- 2Acknowledge the fault code to check if it clears
- 3On the operator panel, go to Setup > Clock Setup and set the RTC clock appropriately
- 4Reapply battery power to the control
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 1689 on your specific Cummins unit — cited to the OEM manual, not a forum guess.
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