A/C Service Station On Refrigerant Circuit, Connecting
- Work procedure may vary depending on the type of tools selected (the tool-specific operating instructions should therefore be followed).
Perform the procedure as described in the A/C Service Station's service/repair/system information. Refer to A/C Service Station's service/repair/system information.
The charging hoses are to be connected as follows to prevent the ingress of air or moisture into the refrigerant circuit:
-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the appropriate information and Infotainment/MMI Operating information.
-- Switch off the ignition.
-- Connect the A/C Service Station to the power supply.
-- Switch on the A/C Service Station and the related information according to specification. Refer to A/C Service Station's service/repair/system information.
-- Remove the closure caps from the service connections (vehicle-specific refrigerant circuit). Refer to REFRIGERANT CIRCUIT .
-- Evacuate the charging hoses if necessary.
-- Check the refrigerant circuit service connections of debris and corrosion and if necessary clean.
Dirt or a rough surface due to corrosion of the service connections can lead to damage of the seals and from this premature damage to the quick-release couplings.
-- Connect the quick-release couplings to the refrigerant circuit service connections.
Risk of Damaging the A/C Compressor or the A/C Service Station
A short circuit between the high and low pressure side is possible when opening the valves with the A/C system is on.
- Never open the valves in the high or low pressure side when the A/C system is on.
-- Install the hand wheel for the low pressure side quick-release coupling connection just far enough into the until the valve is securely opened inside the service connection (pay attention to the pressure gauge, do not put too much pressure on the valve).
-- Perform a gas analysis using the A/C Service Station (only necessary when the refrigerant is to be extracted or the pressure in the refrigerant circuit is to be checked). Refer to REFRIGERANT GAS ANALYSIS, PERFORMING .
Connect the gas analyzer or the A/C Service Station according to the appropriate information and turn on. Refer to the Gas Analyzer appropriate information, A/C SERVICE STATION ON REFRIGERANT CIRCUIT, CONNECTING and/or the A/C Service Station's service/repair/system information.
If it is determined by the gas analysis that the refrigerant in the circuit meets the specifications.
-- Install the hand wheel for the high pressure side quick-release coupling connection just far enough into the until the valve is securely opened inside the service connection (pay attention to the pressure gauge, do not put too much pressure on the valve).
-- Perform the specified procedures on the refrigerant circuit using the A/C Service Station.
If it is determined by the gas analysis that the refrigerant R1234yf is contaminated, extract the refrigerant from the refrigerant circuit and return it to the gas supplier to be processed or disposed of. Refer to CONTAMINATED REFRIGERANT, FILLING IN RECYCLING CONTAINER FOR ANALYSIS, PROCESSING, OR DISPOSAL , RETURN OF CONTAMINATED REFRIGERANT R1234YF FOR ANALYSIS, PREPARATION OR DISPOSAL and EVEN SLIGHT CONTAMINATION CAN CAUSE MALFUNCTIONS FOR THIS REASON WHEN WORKING ON THE A/C SYSTEM PAY ATTENTION TO THE FOLLOWING CLEANLINESS REGULATIONS: A/C TECHNOLOGY BASIC PRINCIPLES .
If there is not the possibility to move the contaminated refrigerant immediately from the vehicle refrigerant circuit in a recycling bottle. Remove (close) the hand wheel from the low pressure side quick-release coupling connection switch off the A/C Service Station (and if necessary disconnect the power supply). Then disconnect the low pressure side quick-release coupling adapter from the vehicle. Then disconnect the low pressure side quick-release coupling connection for example for a workshop extraction system suction hose from the filler hose to the A/C Service Station and let the contaminated refrigerant flow out of the filler hose in the workshop extraction system suction hose. To make the A/C Service Station ready to use again, re-connect the low pressure side quick-release coupling adapter on the filler hose to the A/C Service Station and evacuate using the A/C Service Station according to the corresponding information. Refer to the A/C Service Station's service/repair/system information.
-- Perform the specified procedures using the A/C Service Station.
- Refer to REFRIGERANT GAS ANALYSIS, PERFORMING
- Refer to REFRIGERANT CIRCUIT, DISCHARGING .
- Refer to REFRIGERANT CIRCUIT, EVACUATING .
- Refer to REFRIGERANT CIRCUIT, CHARGING .
- Refer to A/C SERVICE STATION, SWITCHING OFF AND DISCONNECTING FROM REFRIGERANT CIRCUIT
- Refer to REFRIGERANT, FILLING IN RESERVOIR .
- Refer to A/C SERVICE STATION, DISCHARGING .
- Refer to PRESSURES, CHECKING