AUTOOL SC301 Automotive Coolant Leak Detector and Filler

Operating Instructions

Part 1: Basic Operation

• Upon startup, both modes (Testing Mode and Filling Mode) will display their respective gear selections. When you select one mode, the gear display for the other mode will disappear. For example, if you select Testing Mode, the gear display for Filling Mode will not be visible.
• There are three pressure settings based on vacuum pressure levels: -35KPa, -40KPa, and -45KPa.
• In Filling Mode, you can choose the appropriate gear for vacuum pumping. After the vacuum pumping is complete, the system will automatically proceed to coolant filling. If it doesn’t fill, you can perform multiple filling cycles.
• In Testing Mode, if the system cannot achieve and maintain the selected vacuum level, it will switch to pressure-holding mode within two minutes and display a fault reminder.

Part 2: Testing Mode

• Note: Vehicle ignition is not required. Begin by opening the drain valve before starting the operation. (The vent valve is considered open when it aligns parallel to the air hose.)
• Connect to a car battery or a 12V DC power supply and plug it into the machine’s rear power interface.
• Toggle the switch to power on the machine. There will be a buzzer sound to indicate that the machine is starting.
• Connect the air inlet hose to the air compressor.
• Select the desired gear level based on vacuum pressure: -35KPa, -40KPa, or -45KPa.
• Press the [Start/Stop] button to initiate machine operation. The machine will begin the vacuuming process. Wait for the vacuuming to complete, and the machine will automatically enter pressure-holding mode for 60 seconds. Afterward, it will provide an automatic leak detection indication.
• The leak testing function utilizes LED lights to inform the user about the coolant tank’s condition. When there is a leak, the red LED light remains continuously lit, while in the absence of a leak, the green LED light remains continuously lit.

Part3: Filling Mode

• Note: Begin by opening the drain valve before starting the operation. (The vent valve is open when it aligns parallel to the air hose.)
• After completing the Testing Mode, select the Filling Mode to add coolant to the vehicle’s cooling system.
• Connect the filling hose to the vehicle and place the coolant inlet hose into the coolant container.
• Choose the appropriate gear level (for older vehicles, it’s advisable not to use the higher gear levels).
• Press the [Start/Pause] button to initiate the vacuuming process. Once vacuuming is complete, the machine will automatically start adding coolant to the system.
• After the filling is completed, press the [Stop] button.
• After refilling, disconnect the connector from the vehicle.

Part 4: Drain Operation

• Note: When draining the residual coolant, it is recommended to drain in an open area or use a container to collect the liquid.
• After disconnecting the connector from the vehicle, close the drain valve by turning it downward. Press and hold the Tester Mode Start button until you hear the buzzer, then release. Press the Tester Mode Start button to clean the internal pipes; liquid will discharge from the filling port. When no liquid is coming out, press the Tester Mode stop button to finish draining. Turn off the power and remove the compressed air hose.