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Adjusting the
Electronically-Controlled
Low Mode Speed
Adjustment

When operating in low mow mode, press and hold the
Low Speed Mode button reduce the engine speed
(minimum of 2250 rpm). Press the Low Speed Mode
button again to return the engine to the default setting.

Auto Idle Down Mode

If the operator leaves the seat and the safety interlocks
allow the engine to remain running, the system enters
the auto idle mode and automatically set the engine
speed to the low transport speed. When you return
to the seat, the system automatically returns to the
previously selected engine speed mode. If you select
another engine speed setting, the system exits the
auto idle mode and the engine runs at the selected
speed.

Error Messages

If an error occurs, a message displays in place of the
engine temperature, engine speed, and fuel level. In
addition to displaying the fault as text, the system
turns the LED red and sounds the audible alarm.

The system is capable of displaying the following
errors:

Service Air Filter:

An air filter is required.

Service Engine Oil:

Engine oil maintenance

is required.

Service Transmission Oil:

Transmission oil

maintenance is required.

Service Deck Gearbox Oil (as applicable):

Deck gearbox oil maintenance required.

Low Oil Pressure:

Low engine-oil pressure is

detected.

Fuel Low:

The fuel level is low.

Engine Over Temperature:

The engine over

temperature is detected.

System Overvoltage>16VDC:

The system

voltage is too high (greater than 16 V).

System Undervoltage<9VDC:

The system

voltage is too low (greater than 9 V).

Clutch Overcurrent:

The cutting clutch

current is too high.

Clutch Reset Required:

The PTO switch

must be turned off and to activate the PTO.

Engine Error Codes:

The system displays

engine error codes provided by the engine
manufacturer.

Clutch Output Failure:

The clutch output is

open or shorted.

System Voltage Low:

The voltage is too low

(less than 12.3 V).

Engine Communication Error:

The

communication between engine and module
was lost.

Module Communication Error:

The

ommunication between the LDU and MCU
modules was lost.

You can acknowledge and silence some of the
errors listed above. Move the motion-control
levers to the N

EUTRAL

-L

OCK

position and press

and hold the middle button.

Acknowledging an error removes the error
message from the engine temperature, engine
speed, or fuel level icon area and silence the
audible alarm. However, the error continues
to display on the active error screen in the
Maintenance and Service Menu and the status
LED continues to be illuminated red.

– The following errors emit a slow chirping sound

that you can acknowledge and silence:

Service Engine Oil

Service Transmission Oil

Fuel Low

Clutch Overcurrent

Clutch Reset Required

Engine Error Codes

Anti-Stall Active

Service Air Filter

Service Deck Gear Box

– The following errors emit a fast chirping sound

and can be acknowledged and silenced:

System Overvoltage>16VDC

System Undervoltage<9VDC

– The following error codes emit a fast chirping

sound and cannot be acknowledged or
silenced.

Low Oil Pressure

Engine Over Temperature

Engine Communication Error

Module Communication Error

Clutch Output Failure

Engine Limp Mode Active

In order to protect the system components from
exceeding threshold limits, the system is designed
to limit the engine speed and/or disengage the

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Summary of Contents for 74946

Page 1: ...or more information WARNING CALIFORNIA Proposition 65 Warning This product contains a chemical or chemicals known to the State of California to cause cancer birth defects or reproductive harm Screen I...

Page 2: ...ter Return Neutral Lock Located in top row of Information Screen Decrease Previous OPC Operator Presence Control Increase Next Maximum Engine Speed Play Start Reset Efficient Engine Speed Pause Stop E...

Page 3: ...and Orange indicates that a clutch reset is required Buttons The multi functional buttons are located at the bottom of the panel The icons displayed on the information screen above the buttons indica...

Page 4: ...position i e PTO disengaged parking brake engaged motion control levers in the NEUTRAL LOCK position and the operator is present The PTO must be disengaged brake engaged and motion control levers out...

Page 5: ...anced Settings Menu page 10 g038651 Figure 6 1 Maintenance and Service 4 Cancel Exit 2 Gauges and Meters 5 Toggle between screens 3 Advanced Settings 6 Enter Return Maintenance and Service Menu You ca...

Page 6: ...if LDU and MCU are communicating Alarm highlights if On Starter highlights if On Current Error Messages This screen displays the current error as text with the engine hours at which the error occurred...

Page 7: ...14 1 Deck Gear Box Oil 2 Reminder display 3 Engine hours remaining until the service is due Machine Information The screen displays the serial number and model number of the machine g030190 Figure 15...

Page 8: ...ss the Reset button to confirm the reset press Y yes or N no to cancel Figure 20 g030203 Figure 20 1 Reset 3 Y yes 2 Are you sure 4 N no PTO Hours This screen displays a non resettable total PTO hour...

Page 9: ...Trip Statistics 1 is paused the statistics are highlighted and the reset button is available Pressing the reset button resets all 3 parameters Pressing the play button starts data collection g038364...

Page 10: ...ce 2 Reminder display 4 Reset Pressing the reset button brings up a screen asking to confirm the reset reminder Hydraulic Trans Oil After performing the necessary maintenance this screen allows you to...

Page 11: ...age 16VDC System Undervoltage 9VDC System Voltage Low Engine Settings This screen allows you to adjust the engine speed at the Maximum Efficient and Low set points for both transport clutch disengaged...

Page 12: ...ing the system returns the engine speed settings and alarm settings back to the factory default settings g030238 Figure 38 1 Factory Defaults 2 Reset When the exit screen appears press the enter butto...

Page 13: ...rrent The cutting clutch current is too high Clutch Reset Required The PTO switch must be turned off and to activate the PTO Engine Error Codes The system displays engine error codes provided by the e...

Page 14: ...aged before the error occurred the system allows the clutch to remain engaged however low voltage may cause the clutch to disengage itself 4 Low Oil Pressure If low engine oil pressure is detected the...

Page 15: ...ervoltage 16VDC Blink Red Disallow clutch engagement Disengage the clutch System voltage excessive above 16 V Check the battery and engine charging system Contact an Authorized Service Dealer System V...

Page 16: ...cal connections at the module interconnect between the engine wire harness and chassis harness Check the connections at the engine ECU Contact an Authorized Service Dealer Module Communication Error B...

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