Problem: The station does not start, turns off during operation, or has low efficiency.

• Power: Check if the power cord is securely connected to the outlet and the device. Make sure the outlet is working (e.g., by plugging in another device).
• Clogged pre-filter in the suction port: Check if the mesh filter is dirty and clean or replace it if necessary.
• Clogged filter-drier: Very low recovery efficiency and low pressure on the suction side. This is easy to observe when recovering liquid refrigerant by the temperature drop after the filter. A new filter-drier should be installed.
• Excessively high discharge pressure: Check that all valves on the discharge side are open during the station's operation. Additionally, monitor the pressure readings on the station's gauge. After the work is finished, when the refrigerant in the discharge line reaches ambient temperature, the pressure on the gauge should indicate a value equal to the vapor pressure of the refrigerant at that temperature.
• Overload switch (HP): Many stations have a red reset button. If the station has turned off due to excessively high pressure, wait a few minutes for the pressure to drop, and press this button.
• Voltage: Ensure the station is connected to a power source with the correct voltage; avoid using extension cords that are too long or thin.

Problem: The pump does not reach the required vacuum level.

• Oil condition: Remember to change the oil regularly. The oil should be clean and clear. If it is cloudy or milky (contaminated with moisture), it should be replaced immediately.
• Correct operation: Check the pump's operation by connecting it only to a vacuum gauge using leak-proof hoses with high-quality gaskets.
• Leak-tightness of connections: Check all connections for leaks, including the gaskets in the service hoses. Replace with new ones if necessary.
• Gas ballast valve: Ensure it is completely closed in the final phase of creating a vacuum.

Problem: The device constantly alarms or generates "false alarms".

• Calibration: Start the detector in fresh air (not in a machine room where a leak might have occurred).
• Sensor connection: Check that the cable to which the sensor is attached is securely connected to the detector.
• Sensor installation: Check if the sensor is correctly mounted on the flexible hose.
• Dirty filter: Check if the filter in front of the sensor is contaminated and replace it if necessary. Moisture, dust, or oil can cause false readings.
• Sensitivity: Adjust the device's sensitivity level so that the readings do not exceed the range.

Problem: Readings are unstable or inaccurate.

• Battery status: Check the battery charge level.
• Surface: Check the surface on which the scale is placed. It must be flat and stable.
• Overload: Check if the object being weighed is not above the scale's range.
• RESET/ZERO function: Always use the zeroing function after turning on the scale and before placing a cylinder on it.

Problem (electronic): Incorrect readings.

• Battery status: Check the battery status.
• Zeroing sensors: If the manifold is disconnected from all devices, you can zero it by holding the zero button.
• Leak-tightness: Check the tightness of the valves and connection ports (e.g., using pressurized nitrogen). If necessary, replace them with new ones, available from Refco distributors.
• Temperature probes: Ensure the probe's plug is correctly inserted and has good contact with the pipe. If necessary, calibrate in ice water. Details can be found in the device's user manual.

Problem (analog): Pointers do not return to zero.

• Calibration: Use the adjustment screw on the front or top of the gauge. Perform the adjustment when the manifold is disconnected from any pressure source.

Problem: The pump runs continuously, runs dry, or does not turn on.

• Dirty condensate sensor: Contaminants (slime, algae) may have blocked the sensor. Remove the sensor and clean it under a stream of running water.
• No flow: Check if the water outlet hose is not bent, pinched, or clogged. Blow through the pump in the direction of flow.

Problem: Noises are coming from the air conditioner, the pump is running loudly.

• Gurgling sounds: Gravitational siphoning of condensate in the outlet hose, which ends below the air conditioner. Ensure the anti-siphon device is correctly installed. If the height difference is greater than about ½ meter, it is recommended to provide free air access to the drain pipe, which can be made from a larger diameter tube. Insert the pump hose into the tube for a few inches and terminate it above the air conditioner level.
• Slurping sounds: Ensure the reservoir with the condensate sensor is in the correct position. Secure the sensor and the pump using cable ties or double-sided adhesive tape.