valutazioni - 1, GPA: 5 ( )

Produttore : Carrier File Size : 1.08 mb File Nome : 4500624c-2744-44e7-8427-a1116c8c498f.pdf Lingua di insegnamento:

The unit must then be set up by following the on-screen prompts before it can be used. To change the data that was entered during the initial set-up process, or to perform other functions such as clearing job history or recalibrating the pressure transducers, re-enter the System Set-Up mode as follows: 1. If not already done, plug the MAC2000 into a properly grounded AC outlet; set the Power switch to ON; then wait until the unit completes its self diagnostics. The screen will display “Select mode” when ready. 2. Press the Next menu function key to display Menu 2. Then press the System set-up function key. 3. Follow the on-screen prompts to enter the following data or perform the following procedures: • Time & Date • Language • Use Metric units (Yes or No) • Calibrate Pressure Transducers (remove service hoses from the unit’s Service Hose Fittings and follow on-screen prompts) • Elevation above sea level • Clear error flags • Clear job totals • Clear job history • Print data after every job 4. Press the Reset key at any time to save the settings and return to the Main menu. 3.10 Identify Refrigerant Before performing any maintenance work a technician can determine the following information about the vehicle’s refrigerant • Whether the refrigerant in the A/C system can or cannot be recovered • % R-134a • % R-22 • % R12 • % Air • % HC (Hydrocarbons) Perform a refrigerant identity check as follows: 1. If not already done, plug the MAC2000 into a properly grounded AC outlet; set the Power switch to ON; then wait until the unit completes its self diagnostics. The screen will display “Select mode” when ready. 2. Press the Next menu function key twice to display Menu 3. Then press the Identify mode function key. 3. Hook up the service hoses, open the A/C system’s service-port valves, and then press the unit’s Start key. At this time the refrigerant identifier will warm up, zero itself, and then display the message “Analyzing sample, please wait . . .” When complete, the results of the identification process will be displayed. 4. Press Reset to exit the identification screen. 5. Close service-port valves, and remove service hoses from vehicle. 6. Press Start to begin recovering the hoses. During the recovery process the message “Clearing hoses, please wait . . .” is displayed. After recovery is complete, the Main menu will appear. 3.11 Check Internal Tank for Air When the MAC2000 remains turned ON during the day, air is automatically purged from the internal storage tank. A technician, however, can manually check and purge the internal tank of air and any other non-condensable gases as follows: 1. If not already done, plug the MAC2000 into a properly grounded AC outlet; set the Power switch to ON; then wait until the unit completes its self diagnostics. The screen will display “Select mode” when ready. 2. Press the Next menu function key twice to display Menu 3. Then press the Check Tank Air function key. 3. Press the Start key. The refrigerant identifier will first warm up, zero itself, and then display the message “Analyzing sample, please wait …” When complete, the results of the identification process will be displayed. 4. Depending on the percentage of air found in the internal tank, perform one of the following: • If the display shows “Identifier result: EXCESSIVE,” then purge the tank by first pressing the Reset key to display the message “Would you like to purge air?” Then press the Start key to begin purging air. When complete, the Main menu will appear. Repeat Steps 2, 3, and 4 until the percentage of air within the internal tank is at an acceptable level. • If the display shows “Identifier result: RECOVERABLE,” then the amount of air within the tank is at an acceptable level. Press the Reset key to display the message “Would you like to purge air?” Then press the Reset key again to return to the Main menu. 4 Maintenance Field maintenance of the MAC2000 is limited to the following: • Changing the filter drier • Tracking of refrigerant using the unit’s Refrigerant Management System • Replacing the external refrigerant source tank • Replacing the printer paper • Replacing the refrigerant identifier filter All other maintenance should be performed by an authorized Bacharach Service Center (Section 5.2). 4.1 Changing the Filter Drier The MAC2000 has a unique filtering system that ensures the refrigerant transferred to the storage tank is clean and moisture-free. The filter drier must be changed periodically to ensure that the system will work properly. The MAC2000 will automatically indicate when the filter needs to be changed. If the “Change Filter” message appears when the Recovery mode is selected, it is best to complete that job before changing the filter drier. “Change Filter” will be displayed on the screen whenever the recovery mode is selected until the filter has been replaced. All refrigerant must be evacuated from the old filter before it is removed from the unit. Follow the filter change procedure...

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