Get Working with air conditioner service station -> 2.9 Charging refrigerant in reservoir Guide for Volkswagen Scirocco SUV Third Generation (2008-2017)

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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017

Note

♦ Stored in the air conditioner service station is a function via

which it is switched to a specific operating mode when deac‐

tivated. The whole refrigerant is extracted from the charge

hoses into the air conditioner service station with this function.

♦ If the handwheels of the two service couplings are not un‐

screwed when this function is activated, refrigerant could be

extracted from the vehicle's refrigerant circuit.

– Extract the refrigerant from the two charge hoses using the air

conditioner service station as instructed in the relevant oper‐

ating manual ⇒ Operating instructions of air conditioner serv‐

ice station .

Note

♦ If, on an air conditioner service station with a service coupling

that does not vent to the outside, this process takes longer

than approx. 2 minutes or quite a large amount of refrigerant

is extracted, this suggests that there is a fault in one of the

valves in a service connection.

♦ If, on an air conditioner service station with a service coupling

that does vent to the outside, this process takes longer than

approx. 2 minutes, this suggests that there is a fault in one of

the valves in a service coupling.

Note

Erroneous extraction from vehicle's refrigerant circuit.

– First unscrew (close) the handwheels of the quick-release

coupling adapters.

– Then extract the refrigerant from the two charge hoses using

the air conditioner service station.

– Switch off the air conditioner service station (and isolate it from

the power supply if necessary) ⇒ Operating instructions air

conditioner service station .

– Separate the quick-release couplings from the service con‐

nections of the refrigerant circuit.

– Screw the sealing caps on the service connections (see vehi‐

cle-specific refrigerant circuit) ⇒ Heating, air conditioning;

Rep. gr. 87 ; Refrigerant circuit; System overview - refrigerant

circuit .

2.9

Charging refrigerant in reservoir

– Connect the cylinder with fresh R1234yf refrigerant to the

service coupling on the high pressure side of the air condi‐

tioner service station ⇒ Operating instructions air conditioner

service station .

– Perform a gas analysis on the refrigerant (from the cylinder

supplied) with which the system is to be charged using the air

conditioner service station

⇒ “2.3 Performing gas analysis of refrigerant”, page 134 .

•

The procedure described in the operating manual for your air

conditioning service station is to be followed ⇒ Operating

manual for air conditioner service station .

2. Working with air conditioner service station

153

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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017

CAUTION

Risk of explosion from overfilling refrigerant reservoirs.

Refrigerant can expand and cause reservoirs to burst if they are

overfilled.

– Use a refrigerant tank with safety valve.

– Never exceed the permissible fill level of the refrigerant tank.

Note

Depending on the version of air conditioner service station and

the measures to be performed, there is a minimum volume of re‐

frigerant, refrigerant oil and UV leak detection additive that must

be in the respective supply tank of the air conditioner service sta‐

tion ⇒ Operating instructions air conditioner service station

2.10

Emptying air conditioner service station

Note

♦ If it is necessary to discharge the air conditioner service station

(e.g. because contaminated refrigerant was extracted), all fil‐

ters and dryers must be renewed (do not remove filter and

dryer from the air-tight transport package until immediately

before installation to keep absorption of moisture as low as

possible).

♦ If it is necessary to empty the air conditioner service station

(e.g. because certain measures have to be performed on the

air conditioner service station and the refrigerant that has been

or is to be extracted from the air conditioner service station

complies with the specifications (is not contaminated), it can

be filled into a recycling cylinder, if necessary, and then reused

⇒ Operating instructions air conditioner service station .

♦ Refrigerant cylinders that have been charged with contamina‐

ted or used refrigerant are referred to as “recycling cylinders”

or “R cylinders”.

♦ Always evacuate recycling cylinders before the first filling (re‐

frigerant cylinders containing air must not be filled with refrig‐

erant).

♦ Different types of refrigerant must not be mixed together (mix‐

tures of refrigerant cannot be recycled, but must be disposed

of instead). If the composition of the contents in the cylinder is

not clear, the gas processing / gas disposal company must be

informed of this

⇒ “2.13 Filling contaminated refrigerant in a recycling cylinder

for analysis, processing or disposal”, page 161 and

⇒ “6.2.17 Returning contaminated R1234yf refrigerant for

analysis, processing or disposal”, page 25 .

CAUTION

Risk of explosion from overfilling refrigerant reservoirs.

Refrigerant can expand and cause reservoirs to burst if they are

overfilled.

– Use a refrigerant tank with safety valve.

– Never exceed the permissible fill level of the refrigerant tank.

There are various ways to empty an air conditioner service sta‐

tion , observe the operating instructions of the air conditioner

154

Rep. gr.87 - Air conditioning system

Working with air conditioner service station -> 2.9 Charging refrigerant in reservoir for Your Volkswagen Scirocco SUV Third Generation (2008-2017)

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