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Form No. 4503-736 Rev A
RED Equipped User's Guide
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.
Introduction
CONGRATULATIONS on the purchase of your Exmark Mower with RED technology. The patented RED
Technology system is an onboard intelligence platform to help increase fuel efficiency. It enables communication
and response between key systems on the mower. The selectable operating modes on RED equipped mowers
enable operators to match power to specific mowing conditions. Efficient Mode offers peak performance power
with reduced fuel consumption, emissions, noise, and overall wear on the machine. Max Mode provides
increased power for operating in demanding conditions. Low Mode enables optimal operation in wet conditions
and helps reduce deck packing for a superior cut.
Important:
To maximize safety, performance, and proper operation of this machine, it is essential
that all operators carefully read and fully understand the contents of this User's Guide along with
the Operator's manual provided with the product. Safe operation of Exmark equipment is essential.
Failure to comply with the operating instructions or receive proper training may result in injury. Go
to http://www.Exmark.com for additional safe operation information, such as safety tips, training
materials, and Operator's manuals.
The patented RED Technology system monitors engine temperature, oil pressure, and the overall electrical
system, placing the machine in Safe Transport Mode when critical thresholds are exceeded–allowing safe return
for servicing. A visual and audible warning of critical system issues is also displayed.
The patented RED Technology system increases clutch life and improves operator efficiency by automatically
adjusting the engine speed during PTO engagement/disengagement.
This manual will explain the Operator interface to allow users to access information, reset counters, and
modify system settings.
Exmark reserves the right to make changes or add improvements to its products at any time without
incurring any obligation to make such changes to products manufactured previously. Exmark, or its
distributors and dealers, accept no responsibility for variations which may be evident in the actual
specifications of its products and the statements and descriptions contained in this publication.
© 2017—Exmark Mfg. Co., Inc.
www.Exmark.com
Original Instructions (EN)
All Rights Reserved *4503-736* A
Industrial Park Box 808
Printed in the USA
Beatrice, NE 68310

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Table of Contents
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Summary of Contents for Exmark LZS850EKA724W0

  • Page 1 This manual will explain the Operator interface to allow users to access information, reset counters, and modify system settings. Exmark reserves the right to make changes or add improvements to its products at any time without incurring any obligation to make such changes to products manufactured previously. Exmark, or its distributors and dealers, accept no responsibility for variations which may be evident in the actual specifications of its products and the statements and descriptions contained in this publication.
  • Page 2: Screen Icons

    1. Screen Icons The information screen uses the following icons: Gauge and Meters Processing Advanced Settings Battery Voltage Maintenance and Service Engine Hours Fuel Level Cancel/Exit Toggle Between Screens Park brake Enter/Return Neutral Lock *Located in top row of Information Screen Previous...
  • Page 3 OPC (Operator Presence Control) Next Max Engine Speed Reset Efficient Engine Speed Play/Start Low Engine Speed Pause/Stop Transmission Oil Maintenance Increase Engine Oil Temperature Decrease...
  • Page 4 Engine Oil Maintenance *Located on bottom row of some menu screens...
  • Page 5: Product Overview

    2. Product Overview 3. Controls Information Screen The information screen displays icons and information relative to machine operation and is backlit for viewing in low light situations. The information screen is located above the push buttons. Refer to the Screen Icons section for descriptions. LED Status Light The LED is multi-colored to indicate the system status g030387...
  • Page 6: Information Screens

    4. Information Screens 4.3 Engine-On Screen The main information screens are: When the engine is running, the default screen is shown in Figure • 4.1 Start-up Screen • 4.2 Engine-Off Screen • 4.3 Engine-On Screen • 4.4 Menu Selection Screen 4.1 Start-up Screen During startup, the module will display the screen shown in...
  • Page 7: Menu Selection Screen

    the operator to reset the PTO switch by turning it “OFF” (pushed down) and then turning it “ON”. • Operator must be in seat when PTO is engaged, brake is disengaged, or motion control levers are moved in or engine will stop. •...
  • Page 8: Menu Options

    5. Menu Options 5.1.1 Status of Inputs This screen lists all of the inputs to the system The Menu Selection Screen allows the user to cycle and highlights the one currently active. Inputs with through the different menu options by pressing the numerical values will display the current value.
  • Page 9 5.1.2 Status of Outputs 5.1.4 Hydraulic Transmission Oil Maintenance This screen lists all of the outputs from the system This service reminder screen displays the hours until the specified maintenance is due. and highlights the one currently active. Outputs with numerical values will display the current value.
  • Page 10 Press the toggle button to also display the non-resettable engine hours at which every service reminder reset was performed. g030192 Figure 17 3. Hardware version 1. Module information 2. MCU 4. Software version g030189 Figure 14 To exit the screen, press the previous or next arrow 1.
  • Page 11 5.2 Gauges and Meters 5.2.2 PTO Hour Counter Menu Option This screen displays a non-resettable (total) PTO hour counter and a resettable (trip) counter. The user can scroll between the following screens in the Gauges and Meters menu: • 5.2.1 Engine Hour Counter •...
  • Page 12 5.2.4 Fuel Economy Gallons/Liters of Fuel Used Per Hour This screen displays the gallons/liters of fuel used per engine hour. g038364 Figure 25 1. Trip statistics 1 4. Displays gallons/liters of fuel 2. Displays engine ON hours 5. Play/Start g038363 6.
  • Page 13 Every time the hydraulic transmission oil service reminder is reset, the module prompts the user to select whether the machine was serviced with Exmark Premium Hydraulic Oil. Pressing Y (yes) or N (no) determines the correct maintenance schedule.
  • Page 14 3. Audible alert 1. Hydraulic trans oil 3. Y (yes) 2. Activate/Deactivate 4. Enter/Return 2. Use Exmark Premium Oil 4. N (no) service interval? The highlighted error name indicates that the audible alarm is active. Pressing enter modifies the status of the audible alarm to ON or OFF.
  • Page 15 g030227 g030234 Figure 34 Figure 36 1. Engine settings 2. Adjust engine speeds 1. Calibrate engine settings 2. Start calibration Pressing the up arrow will increase the engine speed An animated hourglass will appear indicating the while pressing the down arrow will decrease the calibration is in process.
  • Page 16: Error Messages

    by pressing and holding the low speed mode button. Pressing the low speed mode button again will return the engine to the default low mow mode engine speed. 9. Auto Idle Down Mode If the operator leaves the seat and the safety interlocks allow the engine to remain running, the g030238 Figure 39...
  • Page 17 – Module Communication Error: clutch; a “Clutch Overcurrent” error message communication is lost between the LDU will display. Cycling the key switch to “OFF” and MCU modules. and then to the “ON” position will clear the fault. • Some of the errors listed above can be acknowledged and silenced.
  • Page 18: Troubleshooting

    11. Troubleshooting System Error Message Status LED System Actions Issue Description Recommended Corrective Action Engine oil service is Replace engine oil and filter. Follow Service Engine Oil Blink Red due. reset procedure (section 5.3.1). Transmission oil Replace transmission oil and filter(s). Service Transmission Blink Red service is due.

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