Case CX490D Operator's Manual page 152

Rear and right-side camera view operating mode.
(C) EGR problem.
SCR detection icon slow flashing.
Three short beeps.
(D) After 5 h with no action taken.
SCR detection icon fast flashing.
Continuous beep.
At the step (D), the operation of the machine shall be
stopped. Reach a safe condition for the machine, and
immediately call the CASE CONSTRUCTION dealer for
inspection and repair of the EGR system.
3 - CONTROLS AND INSTRUMENTS
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