Form No. 3445-184 Rev A Z Master® Professional 7500-D Series Riding Mower With 144in TURBO FORCE® Rear Discharge Mower Model No. 72144—Serial No. 400000000 and Up Software Guide Read this information carefully to learn how to operate and maintain your product properly and to avoid injury and product damage. You are responsible for operating the product properly and safely. Read your Operator’s Manual for more information.
Parking Brake Neutral-Lock Yes Enter/Return Decrease Previous Increase Next Play/Start Reset *Located in top row of Information Screen Operator Presence Control (OPC) Max Engine Speed Efficient Engine Speed Pause/Stop Error Warning Engine Diesel Particulate Filter (DPF) Hydraulic-Fluid Temperature Engine Glow Plugs Active Engine DPF Regeneration Inactive/Failed/Interrupted Engine DPF Soot Percentage Gearbox-Oil Maintenance 2
Language Recommended Engine Cooldown Time Attention Safety Alert Shut Off the Engine Transmission Low Speed Transmission High Speed Product Overview g362697 Figure 2 Horizon Display Monitor g362360 Figure 1 1. Deck lift and wing deck fold/unfold switch 2. Key switch 4. High-Low speed range switch 5. Horizon display monitor 1. Screen 2. LED status light 3. Blade-control switch (power takeoff) 3 3.
Screen Engine Screens The screen displays icons and information relative to machine operation and is backlit for viewing in low light situations. The screen is located above the buttons. Engine-Off Screen When the key is on without the engine running, the Engine-Off screen displays (Figure 3). Refer to the Screen (page 4) section for icon descriptions. LED Status Light The LED status light is multi-colored to indicate the system status and is located on the right side of the panel.
Engine Speed Mode moves toward the bottom of the display as the engine cools and is empty when it is safe to shut off the engine. If you shut off the engine before the cooldown period has expired, a fault is logged in the historical fault log. 3 modes are available: LOW, EFFICIENT, and MAXIMUM. • LOW: Low transport speed/Low idle for reducing deck packing in wet mowing conditions. • EFFICIENT: Medium transport speed and maximum fuel economy and normal mowing conditions.
If the engine ECU senses that the DPF backpressure has increased past an acceptable threshold, an auto regeneration will occur. During the auto regeneration, the intake throttle valve limits the air flow into the engine while the injectors add additional fuel. This process increases the DPF temperature, which allows accumulated particulate to burn off. The auto regeneration is completed when needed. The machine can continue to be used during an auto regeneration. g216605 Figure 6 1.
excessively or not run under a sufficient load. If multiple successive regenerations are required, it may indicate that the DPF will require service soon, that an engine problem exists (e.g., incorrect engine fuel or oil) or that a DPF pressure sensor is failing. Important: A stationary regeneration can be initiated by the engine ECU or by you, the user. You can monitor the DPF soot percentage on the Engine-Off Screen or in the Maintenance and Service Menu.
g216675 Figure 13 g217322 1. Start Regen Figure 15 A. Shut off the engine and wait for all moving parts to stop. Ensure that the machine is on a level surface. B. Move the control levers to the neutral lock position and engage the parking brake. 1. DPF Soot % 2. Start Regen? 3. Previous 4. Next The regeneration process begins and the module displays the Regen Active screen (Figure 16). Pressing the cancel button cancels the process.
One of 3 outcomes result: – Failed—if the engine ECU determines that a recovery regeneration cannot be completed, the module displays the Regen Failed—See Dealer screen (Figure 19). Take the machine to an Authorized Service Dealer. – Complete—if the process completes successfully, the module displays the Regen Complete screen (Figure 17). It includes a 5-minute countdown bar graph. Note: If you take no action and the 5-minute countdown timer on the screen expires, the engine shuts off.
Menu Selection Screen The Menu Selection Screen displays when you place the motion-control levers in the NEUTRAL-LOCK position and press and hold the 2 outside LDU buttons. g257032 Figure 21 1. Maintenance and Service 2. Language 5. Cancel/Exit 6. Toggle between screens 3. Gauges and Meters 7. Enter/Return 4.
• Fuel pump power (highlights if on) The following are a list of items available in the Status of Inputs screen: • Engine power to run (highlights if on) • System voltage • Engine communication (highlights if the module is • Fan speed percentage • Fan reverse delay communicating with the engine ECU) • • • • • • • • • PTO switch (highlights if on) Current Error Messages Neutral switch (highlights if on) This screen displays the current error as text with the engine hours at which the error occurred
Hydraulic Transmission Oil Engine Oil This service reminder screen displays the hours until the hydraulic transmission oil maintenance is due. This service reminder screen displays the hours until the engine oil maintenance is due. g030186 g030188 Figure 25 Figure 27 1. Hydraulic transmission oil 1. Engine Oil 2. Reminder display 2. Reminder display 3. Engine hours remaining until the service is due 3.
Deck Gearbox Oil Module Information Applicable Models Only The screen displays the current installed version of software and hardware for both the LDU (Logic Display Unit) and the MCU (Master Control Unit). Select the toggle button to see the MCU screen. This screen displays the hours until the Deck Gear Box Oil maintenance is due. g219156 Figure 29 1. Deck Gear Box Oil 2. Reminder display g030191 Figure 32 3. Engine hours remaining until the service is due 1. Module Information 2. LDU 4.
Gauges and Meters Menu You can scroll between the following screens in the Gauges and Meters menu: • Engine Hours (page 14) • PTO Hours (page 14) • Fuel Used (page 14) • Fuel Economy (page 14) • Trip Statistics (page 15) g030204 Figure 37 1. PTO Hours 3. Trip hours 2. Total hours 4. Reset trip hours Engine Hours This screen displays a non-resettable, total engine hour counter and resettable trip counter.
Trip Statistics There are 5 trip statistics screens to scroll though and view. g038365 Figure 42 1. Trip Statistics 4 g030207 2. Displays engine hours Figure 40 3. Displays PTO hours 2. View trip statistics 1. Trip Statistics Press the toggle button on the Trip Statistics 5 screen to go back to the main Trip Statistics screen. Each screen features resettable counters for the following parameters: Engine Hours, PTO Hours, and total US gallons/liters of fuel used.
Advanced Settings Menu Engine Oil When the advanced settings menu is selected, the module prompts you for a 4-digit passcode. The default digits on the display screen are 0 0 0 0. After performing the necessary maintenance, this screen allows you to reset the number of hours until the engine oil service is due. g030245 g030221 Figure 44 Figure 43 1. Enter password 4. Enter/Return 2. Active digits 5. Decrease 2. Reminder display 3.
Deck Gear Box Oil Wheel Drive Gear Box Oil This reminder screen allows you to reset the number of hours until the deck gear box oil service is due. This reminder screen allows you to reset the number of hours until the wheel drive gear box oil service is due. g267030 Figure 46 1. Deck gear box oil 3. Remaining hours until service g366870 Figure 48 2. Reminder display (e.g., maintenance hours to service) 1. Wheel drive gear box oil 3. Remaining hours until service 2. Reminder display (e.g.
Historical Error This screen displays errors that are no longer active. The log keeps a running count of the number of times the error has occurred during the life of the machine and the engine hour at which the last occurred. The log displays the errors starting with the most recent occurrence. g038366 Figure 52 Figure 50 3. Number of times the error occurred during life of machine (e.g., 3X) 2. Current error (e.g. Low Oil Pressure) 4. Engine hour at which the error last occurred 4. Toggle 2.
Adjust the Fan Settings These screens are used to adjust how often the fan reverses (Figure 56). g030228 Figure 54 1. Engine Settings 4. Up arrow—Increase 2. Set Low Mow Speed 5. Enter 3. Engine speed in rpm (e.g., 3,600 rpm) 6. Down arrow—Decrease g320727 Figure 56 1. Fan settings The system does not allow the following to occur: 2.
Calibrate Engine Settings Factory Defaults This screen allows the calibration of the actual engine speed to match the commanded engine speed. The enter button blacks out if the blades are not disengaged, the parking brake is not engaged, and the motion-control levers are not in the NEUTRAL-LOCK position. Once they are, press the Enter button to start the calibration process. This screen allows you to reset system settings back to the factory default settings.
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 2,250 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.
• speed, locks out the PTO, and disengages the clutch; an Engine Over Temperature message displays. The fault clears once the temperature falls below a safe limit.
Troubleshooting Issue Description Recommended Corrective Action Blink Red The engine oil service is due. Replace the engine oil and filter. Follow the reset procedure; refer to Engine Oil (page 16). Service the Transmission Oil Blink Red The transmission oil service is due. Replace the transmission oil and filter(s). Follow the reset procedure; refer to Hydraulic Transmission Oil (page 16). Low Oil Pressure Blink Red Safe Transport Mode—engine limited to Efficient mode and the PTO is disengaged.
Status LED System Actions Issue Description Recommended Corrective Action Blink Red Safe Transport Mode—engine limited to Efficient mode and the PTO is disengaged. The communication between the LDU module and MCU module has been lost. Check the electrical connections at the LDU and MCU module. Wing Deck Interlock Fault Blink Red Disallow the clutch engagement/disengage the clutch Wing deck not fully deployed. Deploy the wing deck, then cycle the PTO switch off then on to re-engage the clutch.
