Kubota B2650 Operator's Manual page 39

IMPORTANT:
A When the regeneration interval becomes shorter, parked regeneration will be required as followed.
1.
If it takes shorter than 4 hours or so for the regeneration indicator to go out and light up again.
2.
Parked regeneration indicator starts flashing.
D Buzzer: Sounding every 5 seconds.
3. Immediately discontinue working the tractor and begin the parked regeneration cycle process.
D For the procedure, refer to "Operating Procedure for Parked Regeneration".
OPERATING THE ENGINE 19