Évaluations - 3, GPA: 3.7 ( )

Fabricant : Amana Taille : 1.08 mb Nom Fichier : 4500624c-2744-44e7-8427-a1116c8c498f.pdf Langue d'enseignement:

• Next menu – Displays Menu 2. Menu 2 • Main menu – Returns display to the Main menu. • System flush – Removes all oil and refrigerant from an A/C system. This mode is often used prior to retrofitting a system to R-134a. • Tank refill – Overrides the automatic tank refill function of the MAC2000 and transfers refrigerant from the external source tank to the internal storage tank. • System set-up – Sets up certain operating parameters in order for the MAC2000 to operate correctly. The set-up information must be entered prior to operating the MAC2000. • Next menu – Displays Menu 3. Text Box: Main System Tank System Next menu flush refill set-up menu Text Box: Recovery Vacuum Charge Snapshot Next mode mode mode mode menu Menu 3 • Main menu – Returns display to the Main menu. • Identify mode – Identifies refrigerant in a vehicle’s A/C system without having to recover the refrigerant. After the unit is finished identifying the refrigerant the display returns to the Main menu. • Check tank air – This option allows a technician to manually check the internal source tank for air and other non-condensables, and then purges the tank if too much air is present. • Refri data – Accesses the unit’s historical refrigerant data. • Filter change – Removes refrigerant from the filter dryer prior to its replacement. 3.2 Diagnosing A/C System Operation Using the Snap-Shot Mode WARNING Always wear eye protection and protective clothing when working with refrigerants. Observe all warnings at the beginning of this manual. Be sure the vehicle is in PARK before turning on the engine. Provide adequate ventilation or pipe exhaust to outside. Vehicle exhaust fumes can cause injury or death. To assist in system diagnostics, the MAC2000’s Snap-Shot mode allows a technician to monitor and record the following key operating information from the vehicle being serviced. This data can be collected before and after servicing to show any changes in performance of a vehicle’s A/C system. • Date and Time • Ambient Temperature & Humidity • Low Side System Pressure, minimum and maximum values • High Side System Pressure, minimum and maximum values • Front Duct Temperature, minimum value • Rear Duct Temperature, minimum value • Refrigerant Identifier Results Text Box: Main Identify Check Refri Filter menu mode tank air data change Data is collected from inside the vehicle’s passenger compartment by means of the snap-shot transmitter (shown below). This transmitter is powered from the vehicle’s cigarette-lighter, and wirelessly transmits temperature (and optional air flow) data to the MAC2000. Snap-Shot Transmitter Red Temperature Sensor – This sensor should be used on the front A/C vent in the vehicle. The temperature is displayed as “RED TEMPERATURE” on the Snap-Shot mode screen. Blue Temperature Sensor – This sensor should be used on the rear A/C vent. The temperature is displayed as “BLUE TEMPERATURE” on the Snap-Shot mode screen. Anemometer (optional) – The optional Anemometer measures airflow. This sensor can be purchased separately. Communications Port – Used to connect the transmitter directly to the MAC2000 via a cable (instead of transmitting data wirelessly). This port is not normally used, and requires a cable (not included). Enter the Snap-Shot 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 Snapshot mode function key to select the Snap-Shot mode. 3. Follow the instructions on the screen. A technician will be instructed to connect the high- and low-side service hoses to their respective service ports on the vehicle’s A/C system and open the A/C system’s service-port valves. Connect the red and blue temperature sensors, start the vehicle, then turn the vehicle’s A/C system to its maximum cool or re-circulating setting. 4. Press the unit’s Start key. 5. After identifying the refrigerant in the vehicle, the MAC2000 displays and updates the minimum and maximum values as shown on the display. The snap-shot display can now be used to monitor the performance of the vehicle’s A/C system. 6. While in the snap-shot mode, the following operations can be performed: • Main menu – Returns display to the Main menu. • Capture (Print) – Prints the following data: • Reset Values – Resets and begins tracking new min. and max. values. • Recover – Starts a recovery operation. Text Box: Main Capture Reset Recover menu (Print) Text Box: ---Snap-shot report-- Date :May 18, 2001 Time :PM 02:14 Low PSI :(min) 17 (max) 18 High PSI :(min) 17 (max) 18 Duct Air Flow. : (max) 0 ft/m Blue vent. Temp.: (min) 8 F Red vent Temp. : (min) 73 F Ambient Temp. : 73 F Ambient Humidity: 49 RH% ---Identifier result --- RECOVERABLE R134a: 99.9% R12 : 0.0% R-22: 0.0% HC : 0.0% AIR: 1.5% ---Snap-shot encrypted code--- 001 Q54 L6G 028 M94 H29 3.3 Recovery Mode The recovery mode removes all re...

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