Jacobsen LF557 Safety, Operation & Maintenance Manual page 59

MAINTENANCE 9
A Regen cycle that is not completed will move the engine through six different levels of control.
Level 0 - Normal operation of mower with Passive Regen. When particles reach the Active Regen level, the engine
controller will change to Level 1. When the engine controller is at Level 0, the Active and Parked Regen is disabled.
Level 1 - Engine will enter Active Regen state unless the REGEN INHIBITED screen is shown on the LDU. Normal
Active Regen is completed in approximately 20 minutes. If the particle material level does not decrease to the Passive
Regen level in 30 minutes (1800 seconds), the engine controller will change to Level 2. When the engine controller is at
Level 1, the Parked Regen is disabled
Level 2 - Regen Request light will flash. Engine will enter Active Regen state unless the REGEN INHIBITED screen is
shown on the LDU. When the mower is parked and the parking brake is engaged, the Parked Regen state is available.
If the engine is operated at Level 2 without a Regen for approximately 1 to 1-1/2 hours, the engine controller will
change to Level 3.
Level 3 - Regen Request light will flash and the check engine light is illuminated. The engine power output is
decreased and Active Regen is disabled. When the mower is parked and the parking brake is engaged, the Parked
Regen state is available. If the engine is operated at Level 3 without a Regen for approximately 1 to 1-1/2 hours, the
engine controller will change to Level 4.
Level 4 - High Exhaust Temperature Light will flash and the check engine light is illuminated. The engine power output
is decreased significantly. Active and Parked Regen is disabled. The Kubota Diagmaster tool is needed to start a
Regen. If the engine is operated at level 4 without a Regen for approximately 1 to 1-1/2 hours, the engine controller will
change to Level 5.
Level 5 - High Exhaust Temperature light will flash quickly and the check engine light is illuminated. The engine power
output is decreased significantly. An authorized Kubota Engine Service Center must clean the DPF before the mower is
used.
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