Get Air conditioning system -> 1.6.1 General information about cleaning refrigerant circuit Guide for Volkswagen Touran 4 Door Second Generation (2015-2022)

Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...

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

Note

♦ In the event of internal damage (to the air conditioner com‐

pressor), check the refrigerant hoses and condenser. If con‐

taminated by swarf, for example, clean ^lt^khe refrigerant hoses

and condenser (flush with R1234yf refrigerant

⇒ “1.6 Cleaning refrigerant circuit”, page 92 ); renew refrig‐

erant hoses if necessary.

♦ On certain vehicles (e.g. vehicles with 2 evaporators), the vol‐

ume of refrigerant oil in the refrigerant circuit may be greater

than the volume in the replacement air conditioner compres‐

sor. Replenish the refrigerant circuit on these vehicles with the

amount of refrigerant oil necessary ⇒ Heating, air condition‐

ing; Rep. gr. 00 ; Technical data (vehicle-specific workshop

manual).

♦ In the event of a fault in the electronics of an electrical air con‐

ditioning compressor (e.g. control unit for air conditioning com‐

pressor - J842- defective), the refrigerant circuit need not be

flushed. In this case, the air conditioner compressor is to be

renewed without there being a requirement to clean the re‐

frigerant circuit

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerant circuit”, page 85

– Renew desiccant bag/desiccant cartridge (reservoir/receiver)

⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit;

System overview - refrigerant circuit .

– Check expansion valve for contamination or corrosion, renew

if necessary ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrig‐

erant circuit; System overview - refrigerant circuit .

– Assemble the refrigerant circuit, evacuate and charge

⇒ page 129 .

1.5.6

Renewing desiccant cartridge / receiver

after cleaning refrigerant circuit

Note

Installed in the receiver is usually a desiccant cartridge or desic‐

cant bag (depending on the layout of the refrigerant circuit) ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit; System

overview - refrigerant circuit

♦ Observe the general information about renewing components

⇒ “1.5.1 General information about renewing components”,

page 79

Note

Clean the refrigerant circuit. In other words, flush with R1234yf

refrigerant ⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

For example due to moisture ingress (the refrigerant circuit was

open for too long) or contamination

– Drain refrigerant circuit ⇒ page 129 .

– Remove air conditioner compressor ⇒ Heating, air condition‐

ing; Rep. gr. 87 ; Air conditioner compressor .

Rep. gr.87 - Air conditioning system

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Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...

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

– Rectify cause of fault ⇒ Heating, air conditioning; Rep. gr. 87 ;

Refrigerant circuit; System overview - refrigerant circuit .

– Clean refrigerant circuit (flush with R1234yf refrigerant)

⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

Electrical air conditioner compressor

– Flush air conditioner compressor of old refrigerant oil

⇒ “2.11 Cleaning electrical air conditioning compressor”, page

155 .

Mechanical air conditioner compressor

– Remove oil drain plug from air conditioner compressor ⇒

Heating, air conditioning; Rep. gr. 87 ; Air conditioner com‐

pressor .

Note

Different versions of oil drain plug and corresponding seal, renew

⇒ “1.5.2 Renewing leaking or damaged components of empty re‐

frigerant circuit (apart from air conditioner compressor and re‐

ceiver)”, page 81 , ⇒ Heating, air conditioning; Rep. gr. 87 ;

Refrigerant circuit; System overview - refrigerant circuit (vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

– To speed up draining of the refrigerant oil, rotate the shaft of

the air conditioner compressor e.g. using the belt pulley or the

magnetic clutch pulley ⇒ Heating, air conditioning; Rep. gr.

87 ; Air conditioner compressor .

– Pour out old refrigerant oil from air conditioner compressor

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerant circuit”, page 85 .

Note

Dispose of old refrigerant oil (observing local regulations) ⇒ VW /

Audi ServiceNet .

All air conditioner compressors

– Check expansion valve for contamination or corrosion, renew

if necessary ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrig‐

erant circuit; System overview - refrigerant circuit .

– Then fill the air conditioner compressor with new refrigerant oil

by the same amount of refrigerant oil filled in the replacement

air conditioner compressor (or by the specified amount of re‐

frigerant oil if the vehicle is fitted with 2 evaporators) ⇒

Heating, air conditioning; Rep. gr. 00 ; Technical data; Re‐

frigerant oil .

1. Refrigerant circuit

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Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...

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

Note

♦ Different refrigerant oils and volumes for different air condi‐

tioner compressors ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data (vehicle-specific workshop manual).

♦ To ensure proper lubrication of the air conditioner compressor

when it runs for the first time, the air conditioner compressor

must be filled with at least 40 cm³of refrigerant oil; the re‐

mainder can be poured e.g. into a refrigerant line or the new

reservoir/receiver/inner heat exchanger

⇒ “1.5.1 General information about renewing components”,

page 79 , ⇒ Heating, air conditioning; Rep. gr. 00 ; Technical

data .

♦ If dirt enters the air conditioner compressor while the refriger‐

ant circuit is open (e.g. after an accident), the refrigerant circuit

must be cleaned and the air conditioner compressor renewed

⇒ “1.6 Cleaning refrigerant circuit”, page 92 and ⇒ Heating,

air conditioning; Rep. gr. 87 ; Air conditioner compressor .

♦ On vehicles with 2 evaporators, the volume of refrigerant oil in

the refrigerant circuit may be greater than the volume in the

replacement air conditioner compressor. Replenish the refrig‐

erant circuit with the amount of refrigerant oil necessary ⇒

Heating, air conditioning; Rep. gr. 00 ; Technical data (vehicle-

specific workshop manual).

– Renew desiccant bag/desiccant cartridge (receiver) ⇒ Heat‐

ing, air conditioning; Rep. gr. 87 ; Refrigerant circuit; System

overview - refrigerant circuit .

– Assemble the refrigerant circuit, evacuate and charge

⇒ page 129 .

1.5.7

Renewing receiver with no need to clean

refrigerant circuit

Note

Installed in the receiver is usually a desiccant cartridge or desic‐

cant bag (depending on the layout of the refrigerant circuit) ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit; System

overview - refrigerant circuit

♦ Observe the general information about renewing components

⇒ “1.5.1 General information about renewing components”,

page 79

Note

Clean the refrigerant circuit. In other words, flush with R1234yf

refrigerant ⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

♦ For example, refrigerant has leaked out but no dirt has entered

the circuit.

♦ If the gas analysis shows that contaminated refrigerant was in

the circuit but there appears to be no problem with the function

of the air conditioning system

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

– Drain refrigerant circuit ⇒ page 129 .

Rep. gr.87 - Air conditioning system

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Air conditioning system -> 1.6.1 General information about cleaning refrigerant circuit for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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