Filling the air conditioning
Precondition
The service function must be active.
PHEV, hybrid: The engine is switched off.
Heating and air conditioning system is switched off.
The refrigerant circuit is evacuated and tight.
Vehicle must be positioned on the ground.
Injury hazard!
- Note and follow safety instructions on containers.
- Avoid contact with refrigerant; wear safety goggles and hand protection.
- For additional information see: NOTES REGARDING REFRIGERANT (R134A, R1234YF) AND REFRIGERANT OIL , and NOTES FOR REPAIR WORK ON AIR CONDITIONING .
Filling a raised vehicle will result in insufficient filling levels.
In some cases, Sanden SP-A2 refrigerant oil must be injected into the refrigerant circuit.
- Determine the quantities of new
refrigerant oil to be refilled:
In addition to the drawn off and recorded coolant oil level, add the following quantities (if applicable):
- Replenish refrigerant oil losses that have occurred over time according to the table:
Table 1 indicates the permitted loss of refrigerant after a specific period of time. There are no leaks. Refrigerant oil must not be topped up.
Table 2 indicates the coolant oil level which must be topped up after a specific period of time with an impermissible loss of refrigerant due to a leak.
Case 1 : Loss of refrigerant as shown in Table 1 is not exceeded:
- Top up missing refrigerant
- Topping up of refrigerant oil is not permitted
Case 2: Loss of refrigerant as shown in Table 1 is exceeded:
- Top up missing refrigerant
- Refrigerant oil must be topped up additionally as per Table 2
Table 1/case 1 Number of years since last filling 0-1 1-2 2-3 3-4 4-5 Permissible loss [g] -> do not top up refrigerant oil ≤30 ≤60 ≤90 ≤120 ≤ 150 Table 2/case 2 Number of years since last filling Loss of refrigerant [g] Top up quantity refrigerant oil 0-1 < 120 0 0-1 120-150 10 0-1 > 150 20 1-2 <180 0 1-2 180-210 10 1-2 > 210 20 2-3 < 240 0 2-3 240-270 10 2-3 > 270 20 3-4 < 300 0 3-4 300-330 10 3-4 > 330 20 4-5 < 360 10 4-5 > 360 20 - Add refrigerant oil as per the table if parts of the refrigerant circuit have been replaced:
Case 1 : Part exchange as preliminary work for further work and part exchange due to creeping leakage (minor leak e.g. hairline crack)
Case 2: Part exchange due to sudden leakage (major leak, e.g. line disconnection caused by accident)
Case 1 Case 2 Air conditioning compressor(1). (1). (1). Evaporator 10 ml 35 ml Air conditioning condenser without integrated desiccant insert 20 ml 35 ml Air conditioning condenser with integrated desiccant insert 40 ml 55 ml Desiccant insert/dryer flask 20 ml 55 ml Per replaced refrigerant line 10 ml 35 ml Safety pressure switch, gaskets 0 ml 0 ml (1) Air conditioning compressor: see 6452, lubricating the air conditioning compressor - Fill the determined coolant oil quantity into the refrigerant circuit.
- Fill the amount of refrigerant into the refrigerant circuit according to the nameplate.
- Disconnect the high pressure line and low pressure line on the vehicle.
- Drain the high pressure line and low pressure line.
- Once again close the refrigerant filler neck on the vehicle with the sealing caps.TECHNICAL DATA DESCRIPTION
Fill quantity refrigerant R134a/1234yf (G01/G20/G21 PHEV) G01 B48TU1PHEV 700 g G20 B48TU1PHEV 720 g G21 B48TU1PHEV 720 g