Tiffin Motorhomes ALLEGRO BREEZE, Owner'S Manual

Page: 26 / 76

C U M M I N S E N G I N E S
4-4
gas reacts with the NOx in the exhaust to produce harmless nitrogen (N
2
) and water vapor (H
2
O), which
then exits out of the tailpipe.
ATS Warning Lamps
Warning lamps in the driver’s message center alert you of situations with the after-treatment system.
• An illuminated DPF lamp indicates a re-gen is needed. Driving at highway speeds for 20
minutes should correct this condition.
o
A blinking DPF lamp indicates the need for a re-gen is more urgent. Again, driving the
vehicle at highway speeds for 20 minutes should correct this condition.
o A blinking DPF lamp along with a check engine light indicates that the engine is unable to
effectively regenerate, and you should
immediately
seek service at the nearest Cummins
Authorized Dealer.
• An illuminated High Exhaust Temperature (HEST) lamp alerts the operator of elevated exhaust
temperatures while the engine is performing an active re-gen.
Do not operate, or park the
vehicle near flammable objects while the HEST lamp is illuminated.
• An illuminated DEF warning lamp indicates that the DEF tank should be refilled at the next
opportunity. This light will illuminate when the tank level is at approximately 10%.
o A blinking DEF warning lamp indicates the tank level has dropped to approximately 5%.
o A blinking DEF lamp along with the check engine lamp indicates the tank level has
dropped to approximately 2.5%. A 25% reduction in engine torque will be applied with
this condition.
o When the tank is empty the Stop Engine Light will be illuminated and the vehicle speed
will be limited to 5 MPH. Filling the tank with new DEF will remedy this condition.
DPF Maintenance
Eventually ash will accumulate in the DPF and the filter will require servicing. DPF servicing must be
performed by an authorized technician, following the engine manufacturer’s instructions. DPF cleaning
will be required at approximately 200,000 miles of service. A record must be maintained for warranty
purposes, which includes:
•
Date of cleaning or replacement
•
Vehicle mileage
• Particulate filter part number and serial number