Form No. 3448-443 Rev A Z Master® Professional 7500-D Series Riding Mower With 60in or 72in TURBO FORCE® Side Discharge Mower Model No. 72027—Serial No. 400000000 and Up Model No. 72030—Serial No. 400000000 and Up Model No. 72076—Serial No. 409800000 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.
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 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 Shut Off Engine Attention Safety Alert Product Overview g225792 Figure 1 1. LDU (Logic Display Unit) 3. Key switch 2. Deck-lift switch 4. PTO engagement switch g228164 Figure 2 LDU (Logic Display Unit) 1. Screen 2. LED status light 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 Icons (page 1) 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.
g216606 g216638 Figure 5 Figure 7 1. Auto Regen Active 1. Start of Auto Regen If the regeneration is interrupted, the following screen displays: When the engine ECU determines that an auto regeneration is needed, the alarm chirps and the module displays the Start of Auto Regen screen with a 60-second bar graph timer (Figure 5). Once the timer expires, the auto regeneration process begins. Note: No action is required and you can continue to use the machine during the auto regeneration process.
Maintenance and Service Menu by selecting Yes at the prompt. g216641 Figure 11 1. Stationary Regen Required g217322 If you do not perform a stationary regeneration before the timer expires, the engine enters a limp mode and the engine ECU will require a recovery regeneration to be performed. When the module indicates that the engine has entered limp mode, the engine speed and/or power is reduced and it prevents clutch engagement. Figure 9 1. DPF soot percentage 3. Previous 2. Start Regen 4.
time cancels the process and prompts you to engage the parking brake and move the motion-control levers to the NEUTRAL-LOCK position (Figure 14). One of 3 outcomes result: – 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. g216674 Figure 14 1. Set brake and neutral C.
– 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. The menu selection screen allows you to cycle through the following screens. • Maintenance and Service Menu (page 9) • Gauges and Meters Menu (page 12) • Advanced Settings Menu (page 14) g216680 Figure 19 g257032 Figure 21 1. Regen Failed—See Dealer Menu Selection Screen 1.
Status of Inputs The following are a list of items available in the Status of Outputs screen: This screen lists all of the inputs to the system and highlights which is currently active. Inputs with numerical values display the current value. • Engine speed signal shows voltage signal sent from the system to the engine ECU (Engine Control Unit).
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. g030188 g030186 Figure 27 Figure 25 1. Hydraulic transmission oil 1. Engine Oil 2. Reminder display 2. Reminder display 3. Engine hours remaining until the service is due 3.
Machine Information The screen displays the serial number and model number of the machine. g030193 Figure 33 1. Exit 2. Exit Menu g030190 3. Enter/Return Figure 30 1. Machine Information 2. Model number 3. Serial number Gauges and Meters Menu You can scroll between the following screens in the Gauges and Meters menu: Module Information The screen displays the current installed version of software and hardware for both the LDU (Logic Display Unit) and the MCU (Master Control Unit).
Fuel Economy This screen displays the US gallons/liters of fuel used per engine hour. g030203 Figure 35 1. Reset 3. Y (yes) 2. Are you sure? 4. N (no) g038363 Figure 38 1. Fuel Economy PTO Hours This screen displays a non-resettable, total PTO hour counter and a resettable trip PTO counter. 2. Displays US gallons/liters per hour Trip Statistics There are 5 trip statistics screens to scroll though and view. g030204 Figure 36 1. PTO Hours 3. Trip hours 2. Total hours 4.
Advanced Settings Menu 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. g038364 Figure 40 1. Trip Statistics 1 2. Displays engine hours 4. Displays US gallons/liters of fuel 5. Play/Start 3. Displays PTO hours 6. Reset g030221 Figure 42 When a trip statistic is playing, the statistics are not highlighted and the reset button is blacked out and not available.
Engine Oil Deck Gear Box Oil After performing the necessary maintenance, this screen allows you to reset the number of hours until the engine oil service is due. This reminder screen allows you to reset the number of hours until the deck gear box oil service is due. g267030 Figure 45 g030245 1. Deck gear box oil Figure 43 2. Reminder display (e.g., maintenance hours to service) 3. Remaining hours until service 4. Reset 1. Engine Oil 2. Reminder display 3.
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 49 Figure 47 5. Enter • Service Air Filter 3. Number of times the error occurred during life of machine (e.g., 3X) 2. Current error (e.g. Low Oil Pressure) 4. Toggle 2. Clutch Overcurrent 3.
Engine Settings Adjust the Fan Settings This screen allows you to adjust the engine speed at the Maximum, Efficient, and Low set points for both transport (clutch disengaged) and mow (clutch engaged) modes in 50 rpm increments. These screens are used to adjust how often the fan reverses (Figure 52). g320727 Figure 52 1. Fan settings g030227 2. Adjust fan settings Figure 50 1. Engine Settings 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 Error Messages – 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 communication between the LDU and MCU modules was lost.
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. ◊ Engine Communication Error ◊ Module Communication Error ◊ Clutch Output Failure ◊ Engine Limp Mode Active 6. • In order to protect the system components from When the transmission begins to overheat, the system flashes the transmission temperature bar graph and chirps the audible alarm.
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 15). 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 15). Low Oil Pressure Blink Red Safe Transport Mode—engine limited to Efficient mode and the PTO is disengaged.
System Error Message Engine Communication Error Module Communication Error Status LED System Actions Blink Red Blink Red Safe Transport Mode—engine limited to Efficient mode and the PTO is disengaged. 22 Issue Description Recommended Corrective Action The communication between the module and the engine ECU has been lost. Check the electrical connections at the module, interconnect between the engine wire harness, and chassis harness. Check the connections at the engine ECU.
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