Renault Koleos Service Repair Manual: Coolant circuit Draining - Refilling

Renault Koleos Service Repair Manual / Air conditioning / Air conditioning / Coolant circuit Draining - Refilling

AIR CON 01 or AIR CON 02

Air conditioning

IMPORTANT To avoid any risk of damaging the systems, apply the safety and cleanliness instructions and the operation recommendations before carrying out the repair (see 62A, Air conditioning, Air conditioning: Precautions for repair, page 62A-1) .

 

IMPORTANT The following must be worn when handling refrigerant:
  • gloves,
  • protective goggles (with side shields if possible).

In the event of refrigerant fluid coming into contact with the eyes, rinse well with clean water continuously for 15 minutes. If possible, have an eye rinse unit available.

If refrigerant comes into contact with your eyes, consult a doctor immediately. Inform the doctor that the burns were caused by R134A refrigerant.

In the event of contact with other unprotected parts of the body (event though the safety advice has been observed), rinse well with clean water continuously for 15 minutes.

I - FLUID

Note: All vehicles using R134A have a label in the engine compartment specifying its use.

Air conditioning

  • R134A refrigerant is colourless in its liquid state and odourless and invisible in its gaseous state.
  • A summary table indicates the quantities of refrigerant in the circuit depending on the engine type (see 62A, Air conditioning, Air conditioning: Parts and consumables for the repair work, page 62A- 2) .

II - OIL

  • The cold loop contains a special oil to lubricate the compressor.
  • Fill up with the same quantity of oil as was drained.
  • When replacing a component of the heating and air conditioning system, top up the oil level if necessary (see 62A, Air conditioning, Air conditioning: Parts and consumables for the repair work, page 62A-2) and (see Vehicle: Parts and ingredients for the repairwork) (04B, Consumables - Products).
Note: Lubricants are not mutually compatible: always observe the types and quantities of oil required for each compressor even when topping up as this could damage the cold loop components.

Always close the oil cans after use to prevent moisture getting inside and never reuse oil contained in a can that has been open for a long time (viscous appearance).

III - RECOVERING REFRIGERANT

Note: The air conditioning circuit is fitted with a single filler valve, some filling equipment requires only the use of the high pressure pipe (refer to the filling station instructions).

Depending on the situation, run the system for a few minutes before recovering the coolant to improve drainage.

 

Note: These procedures must be followed in order to avoid:
  • gas escaping when the circuit is opened,
  • damage to the environment by releasing gas into the atmosphere when opening the circuit or creating a vacuum.

When draining or checking the refrigerant fill load, three scenarios are to be taken into account:

  • the engine and air conditioning are operating (scenario A),
  • the engine is operating but not the air conditioning (scenario B),
  • neither the engine nor the air conditioning are operating (scenario C).

Scenario A :

  • let the air conditioning operate until the cooling fan is triggered for the second time,
  • switch off the engine,
  • wait 15 minutes,
  • check that the relative pressure is less than or equal to 0 bar,
  • start the drain cycles again if the relative pressure is above 0 bar,
  • add the values of the various draining operations; the fill is confirmed as being correct if the total is equal to the specified fill +35 g or -100 g.

Scenario B :

  • let the engine operate until the cooling fan is triggered for the second time,
  • switch off the engine,
  • drain for the first time (note down the value),
  • wait 15 minutes,
  • let the engine operate until the cooling fan is triggered for the second time,
  • switch off the engine,
  • drain for the second time (note down the value),
  • start the drain cycles again if the relative pressure is above 0 bar,
  • add the values of the various draining operations; the fill is confirmed as being correct if the total is equal to the specified fill +35 g or -100 g.

Scenario C :

  • drain for the first time (note down the value),
  • wait for 2 hours,
  • start the drain cycles again if the relative pressure is above 0 bar,
  • add the values of the various draining operations; the fill is confirmed as being correct if the total is equal to the specified fill +35 g or -100 g.

IV - CREATION OF A VACUUM

  • A good vacuum must be created before filling, otherwise the air conditioning will not operate correctly.

    There are two scenarios to consider:

    • the creation of a vacuum will take place immediately after the drain (scenario A):
    • the creation of a vacuum will take place after several hours or days (scenario B).

Scenario A :

  • the creation of a vacuum lasts 20 minutes,

Scenario B :

  • the creation of a vacuum lasts 45 minutes to eliminate any trace of moisture.
  • Test the seal once the vacuum has been created (some stations do this automatically).

V - FILLING

  • Fill the refrigerant circuit using the refrigerant charging station.
  • Add oil and refrigerant depending on the type and quantity of oil recommended, as well as the operation carried out (see 62A, Air conditioning, Air conditioning: Parts and consumables for the repair work, page 62A-2) and (see Vehicle: Parts and ingredients for the repairwork) (04B, Consumables - Products).
  • Check that the air conditioning system is operating correctly (see 62A, Air conditioning, Air conditioning: Check, page 62A-6) .
  • Check for leaks (see 62A, Air conditioning, Coolant circuit check, page 62A-9) .
    Coolant circuit check

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