AIR CON 01 or AIR CON 02
| 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. |
- 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
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) .
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