Jacobsen LF557 Safety, Operation & Maintenance Manual page 35

6.3.4 OPERATOR MODE _________________________________________________________
The Operator mode is used by the operator to see the engine hours of operation, and inhibit the Active DPF Regen
cycle (T4F/Stage 5 Only). The Cruise Active or Backlap Mode screens are shown when the conditions are met.
When the ignition switch is turned to the RUN position, the horn will activate and all indicator lights will illuminate for
one second. The start screen that shows the LDU and MCU software level is shown for five seconds.
If no faults or alerts are sensed after the engine is started, the ENGINE HOURS screen will be shown on the LDU.
Press the LDU button to move to the next screen.
T4F/Stage 5 Engines Only: To inhibit the Active DPF Regen cycle, push the LDU button until the INHIBIT REGEN
screen is shown on the LDU. Press the joystick forward to toggle between NO and YES. Press the LDU button to
prevent the DPF Regen cycle. The REGEN INHIBITED screen is shown on the LDU until the key switch is turned to the
OFF position.
If the DPF Regen cycle is prevented for too long of a period, a blockage of the DPF can occur. If a blockage of the
DPF has occurred, an authorized Kubota Engine Service Center must clean the DPF before the mower is used.
When each 50 hour interval is reached, the MAINTENANCE INTERVAL screen is shown on the LDU each time the
mower is started. Press the LDU button to clear the screen. See Section 9.2.7 to reset the maintenance interval.
When the optional cruise control kit is installed and the cruise control switch is in the ON position, the CRUISE ACTIVE
screen is shown on the LDU.
T4F/Stage 5 Engines Only: When the TIER 4 SERVICE MESSAGE screen is shown on the LDU, a Parked Regen
cycle is required. See Section 9.11.
To enter Maintenance Mode, press the LDU button until the ENTER PIN screen is shown on the LDU. Use the joystick
to change the numbers and the LDU button to move to the next number. When the correct pin is entered, Maintenance
Mode is active. See Section 9.2 for Maintenance Mode.
JACOBSEN
LDU-A
ENGINE HOURS
000000.0
REGEN INHIBIT?
NO
ENTER PIN
1234
MCU-A
REGEN
Yes
INHIBITED
No
Correct
Maintenance
Pin
Mode Active
Incorrect
Pin
NOTICE
MAINTENANCE
TIER 4 SERVICE
CONTROLS 6
INTERVAL
CRUISE
ACTIVE
MESSAGE
en-32