Porshe 911 (997). Manual - part 856

Fill refrigerant on the air-conditioning system in accordance with regulations. → 870317 Draining and filling
in refrigerant
Open air outlet nozzles on the instrument panel, and set blower to at least 75 %.
After allowing the system to stabilise at idle speed (approx. 5 sec.), switch on air conditioning and allow the
engine to run uninterrupted for at least 2 minutes at 1500 rpm.
Switch off the air-conditioning system again. Do not drive until the air-conditioning system has been filled.

Checking refrigerant oil in "new" air-conditioning compressor

Correct the refrigerant oil level in the "new" air-conditioning compressor

WARNING

A new air-conditioning compressor contains the oil quantity for the complete air-conditioning circuit.

Risk of damaging the air-conditioning compressor by excessive refrigerant oil in the
air-conditioning circuit.

• 

→ If a new air-conditioning compressor or a component in the circuit is replaced, the oil quantity

must be determined and adjusted.

→ Insufficient refrigerant oil causes a lack of lubrication, resulting in the failure of the

air-conditioning compressor.

→ Too much refrigerant oil results in reduced refrigerant performance.

Note

All connection points must be completely dirt-free.
The air-conditioning compressor must be dry (washing the vehicle) and the air-conditioning compressor and
lines must be free of moisture.
The connection points must be closed after they have been opened. Use the original transport caps.
A clean measuring cylinder with a capacity of approx. 300 ml is required.

Determining oil quantity on the "old" air-conditioning compressor

Diagnostic system: reading out fault memory and activating systems

Subsequent work for the air-conditioning compressor

3581

Caps

1. First, open the cap on the high-pressure side and relieve the pressure from the compressor

-A-

 .

2. Open the oil filler screw -B- on the

compressor.

3. Fill the refrigerant oil from the air-conditioning compressor into the measuring cylinder. Turn the pressure

plate on the air-conditioning compressor (not the belt pulley) when emptying the refrigerant oil.

The amount of refrigerant oil is referred to as "V

old

" in the formula below.

4. Always replace the sealing ring for the oil filler

plug.

5. Screw oil filler plug -B- into the compressor. → Tightening torque: 30 (22 ftlb.) Nm

Oil filler screw

Determining the oil quantity at the "new" oil filler screw of the air-conditioning compressor

1. To drain refrigerant oil:

1.1. First, open the cap on the high-pressure side and relieve the pressure from the compressor

-A-

 .

1.2. Open the oil filler screw -B- on the

compressor.

1.3. Drain the refrigerant oil from the air-conditioning compressor.

The refrigerant oil must not be re-used, but must be disposed of properly.

2. To determine the refrigerant oil

quantity:

2.1. V

total

 = "V

removed

" + "V

old

" + 20 cm

3

2.2. V

total

= Total volume for the new air-conditioning compressor

2.3. V

removed

 = Volume of refrigerant oil removed by suction

2.4. V

old

 = Volume of refrigerant oil in the old air-conditioning

compressor

Diagnostic system: reading out fault memory and activating systems

Correct the refrigerant oil level in the "new" air-conditioning compressor

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2.5. 20 cm

3

3. To fill the air-conditioning compressor:

3.1. Fill the determined refrigerant oil volume V

total

 into the air-conditioning

compressor.

3.2. Always replace the sealing ring for the oil filler

plug.

3.3. Screw oil filler plug -B- onto the compressor. → Tightening torque: 30 (22 ftlb.) Nm

3.4. Install air-conditioning compressor. → 873419 Removing and installing compressor -

Installing

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
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.

Diagnostic system: reading out fault memory and activating systems

Correct the refrigerant oil level in the "new" air-conditioning compressor

3583

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.

ADVERTENCIA

Al imprimir se corre el riesgo de perder la correcta asignación de las figuras al texto.

Por motivos técnicos, por el momento no se puede descartar que, aun siendo
correcta la imagen que aparezca en la pantalla, al imprimir se pierda la
correlación entre el texto y la figura correspondiente.

• 

Si este error pasara desapercibido, existe el riesgo de que los trabajos no se
ejecuten de forma correcta y, por tanto, se produzcan daños personales y
materiales.

• 

→ Por ello le rogamos que tras el proceso de impresión compare siempre las copias impresas con
la imagen de la pantalla. En caso de error, corrija las copias impresas de forma que se
correspondan con el contenido de la imagen de la pantalla.

Diagnostic system: reading out fault memory and activating systems

Correct the refrigerant oil level in the "new" air-conditioning compressor

3584