Porshe 911 (997). Manual - part 1199

General safety regulations for refrigerants

ATTENTION

Extreme heating of air-conditioning system e.g. from sunlight shining into the vehicle or as a result of
welding and soldering work.

Danger of fire due to excessive heating of air conditioning.

• 

Danger of environmental pollution due to emerging refrigerant.

• 

→ When carrying out repairs on the air-conditioning system, the system must be emptied by suction

and the refrigerant must be purified. Chlorine-free refrigerants must also not be allowed to escape
into the atmosphere and must be disposed of correctly.

→ Due to their chemical composition, different refrigerants must not be mixed with each other! This

also applies for smaller quantities.

→ No welding, soldering or hot-air heating may take place on parts of the filled air-conditioning

system or in its immediate vicinity.

→ While drying after painting work, the temperature burden on the vehicle must not exceed two

hours at a maximum temperature of 80°C.

→ Whether or not the system is filled with refrigerant, the heating causes a very strong overpressure

which can cause damage to the system or even lead to an explosion.

→ R 134a is completely non-toxic at normal temperatures, but it decomposes upon contact with a

flame or at high temperatures.

→ Refrigerant bottles must not be thrown and must not be subjected to direct sunlight or other heat

sources for an extended period when full.

→ The maximum permissible temperature of a filled refrigerant bottle must not exceed 45 °C.

→ Risk of injury! High temperatures from open flames or hot solids causes chemical breakdown of

refrigerant gas. Inhalation of the resulting breakdown products leads to coughing and nausea.

WARNING

Contact with liquid or gaseous refrigerant.

The refrigerant attacks the skin and damages the skin's surface.

• 

→ Wear rubber gloves to protect your hands.

→ Treat affected skin in the same way as in the case of freezing. Rinse immediately and then consult a

physician.

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→ Wear safety goggles to protect your eyes.

→ If refrigerant still gets in your eyes, consult a physician immediately.

WARNING

The intensive effect of refrigerant on unprotected body parts can cause freezing.

→ Keep an eye-rinse bottle with clear water at hand.

→ If liquid refrigerant gets into your eyes, rinse them thoroughly with water for about 15 minutes.

→ Then consult a doctor immediately.

→ The physician must be informed which refrigerant has caused the freezing.

Note

The following safety measures should be followed for refrigerant R134a (additional regulations may
apply in certain countries).

• 

If repair work necessitates opening the refrigerant circuit, the refrigerant circuit is first to be emptied. Avoid
all contact with liquid or gaseous refrigerants. If refrigerant should escape despite all safety measures having
been taken, the resulting refrigerant/air mixture should not be breathed in. Therefore, switch on extraction
systems, protect hands with rubber gloves and protect eyes with protective goggles.
If refrigerant gets onto any other body parts despite all safety measures having been taken, these should also
be rinsed immediately and thoroughly with water for at least 15 minutes.
Although refrigerant R134a is non-flammable, smoking, welding, soldering and hard-soldering is prohibited
in a room containing refrigerant.

Emptying the refrigerant circuit

Note

Refrigerant R134a contributes to the greenhouse effect as soon as it is released into the Earth's atmosphere.
Refrigerant should not be released into the environment but is to be extracted from the refrigerant circuit using
an extraction or service station. The extracted refrigerant is then prepared again on-site or returned to the
manufacturer for environmentally-friendly disposal (varying or additional regulations may apply in certain
countries).

Working on the refrigerant circuit

ATTENTION

Emerging refrigerant in poorly ventilated rooms and erection pits.

Diagnostic system: reading out fault memory and activating systems

General safety regulations for refrigerants

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Danger of suffocation from odourless refrigerant.

• 

→ The leaking refrigerant is not only colourless and odourless, but is also heavier than air and therefore

displaces oxygen. In poorly ventilated rooms and erection pits there is therefore an undetectable risk of
suffocation.

→ The gas/air mixture formed when refrigerant escapes should not be breathed in but rather extracted via

suitable extraction systems (workshop extraction system).

→ There should be no erection pits, shafts or cellar stairs within a radius of 5 metres.

Painting work on vehicles with air-conditioning

WARNING

Painting work on vehicles with air-conditioning

Material damage due to the air-conditioning system bursting.

• 

→ When carrying out repairs involving painting work, object temperatures in the drying oven or its

preheating zone should not exceed 80 °C.

Notes on general repairs

The refrigerant circuit of the air-conditioning is only to be emptied and opened if this is necessary due to
safety measures or if components of the refrigerant circuit have to be replaced.
The air-conditioning refrigerant circuit also remains closed during all other standard vehicle repair work.
Contact corrosion!
For this reason, the manufacturer only fits connecting elements with a special surface coating.
Contact corrosion can occur if unsuitable connecting elements (screws, nuts, washers, rivets, plugs, adhesives,
etc.) are used.
Only use original Porsche parts!

997110, 997111, 997120, 997121, 997310, 997311, 997320, 997321, 997410, 997411, 997430, 997431,
997610, 997611, 997620, 997621

WARNUNG

Gefahr des Verlusts der Text-Bild-Zuordnung beim Ausdruck.

Aus technischen Gründen kann derzeit nicht ausgeschlossen werden, dass trotz

• 

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Working on the refrigerant circuit

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einwandfreier Darstellung auf dem Bildschirm beim Ausdruck der
Zusammenhang von Text und zugehörigem Bild verloren geht.
Wird der Fehler nicht bemerkt, besteht die Gefahr, daß Arbeiten nicht korrekt
durchgeführt werden und es dadurch zu Personen- und Sachschäden kommt.

• 

→ Vergleichen Sie deshalb nach dem Druckvorgang unbedingt die Ausdrucke mit der
Bildschirmdarstellung. Korrigieren Sie die Ausdrucke im Fehlerfall so, daß der Inhalt der
Bildschirmdarstellung zutreffend wiedergegeben wird.

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence
between text and associated figure can be lost when it is printed out, even though
the display on the screen is correct.

• 

If the fault is not noticed, there is the danger that work will not be performed
correctly which can cause injury and damage.

• 

→ Therefore, always compare printouts with the screen display after printing them out. Correct
the printouts if they are faulty so that the content of the screen display matches that on the
printouts.

AVERTISSEMENT

Risque de perte de la correspondance texte-illustration lors de l'impression papier.

Pour des raisons techniques, il ne peut pas être exclu à l'heure actuelle que, même
en cas d'affichage correct à l'écran, la correspondance entre le texte et l'illustration
puisse être erronée sur l'impression papier.

• 

Si l'erreur passe inaperçue, on court le risque d'exécuter certaines opérations de
manière incorrecte pouvant conduire à des dommages corporels et matériels.

• 

→ Comparez impérativement pour cette raison les impressions papier avec l'affichage à l'écran.
Corrigez-les en cas d'erreur de manière à reproduire correctement l'affichage à l'écran.

ATTENZIONE

Pericolo di perdita dell'abbinamento testo-immagine nella stampa.

Per motivi tecnici non è escluso che, nonostante la rappresentazione sullo schermo
risulti perfetta, durante la stampa venga persa la corrispondenza fra testo e
relativa immagine.

• 

Se tale difetto non viene rilevato vi è il pericolo che i lavori non siano eseguiti
correttamente; ciò può avere come conseguenza lesioni e danneggiamenti.

• 

→ Per questo motivo, dopo la stampa è assolutamente necessario confrontare le stampe con la
rappresentazione sullo schermo. In caso di errore si prega di correggere le stampe, così da
garantire la riproduzione esatta della rappresentazione sullo schermo.

Diagnostic system: reading out fault memory and activating systems

Notes on general repairs

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