Get Air conditioning system Refrigerant circuit -> 1.5 Renewing components Guide for Volkswagen Sharan VAN Second Generation (2010-2023)

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

♦ Quick-release coupling adapter -A- (you can also unscrew the

lk

adapter from your air conditioner service station and use ifor

this test).

♦ Charge hose -A- (e.g. with a M12 x 1.5-6G thread, SAE J639

standard), depending on the thread of the quick-release cou‐

pling adapter (cuoff), with a suitable adapter -B- (for connec‐

tion to the compressed air system used in your workshop or

to a pressure reducer for nitrogen)

♦ Combination fine filter elemenfor compressed air system with

an oil, dirand water separator (to ensure thathe refrigeran

circuiis pressurised with compressed air thais clean, dry and

free of oil) for the leakage teswith compressed air

♦ Manifold gauge with pressure reducer for nitrogen (maximum

reduced pressure: 15 bar) -1-, a full nitrogen gas cylinder -3-

and a charge hose -2- (e.g. with M12 x 1.5-6G thread in

accordance with SAE J639, to which a quick-release coupling

adapter for service connection is fitted) for leakage teswith

nitrogen

– Perform pressure tes⇒ page 143 .

1.5

Renewing components

⇒ “1.5.1 General information abourenewing components”, page

79

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

frigerancircui(aparfrom air conditioner compressor and re‐

ceiver)”, page 81

⇒ “1.5.3 Renewing leaking or damaged components of charged

refrigerancircui(aparfrom air conditioner compressor and re‐

ceiver)”, page 84

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerancircuit”, page 85 .

⇒ “1.5.5 Renewing air conditioner compressor due to leaks or in‐

ternal damage”, page 87

⇒ “1.5.6 Renewing desiccancartridge / receiver after cleaning

refrigerancircuit”, page 88

⇒ “1.5.7 Renewing receiver with no need to clean refrigerancir‐

cuit”, page 90 .

⇒ “1.5.8 Renewing desiccancartridge / desiccanbag with no

need to clean refrigerancircuit”, page 91

1.5.1

General information abourenewing

components

The receiver or desiccancartridge need nobe renewed under

the following circumstances:

♦ The opened refrigerancircuiis sealed immediately with clean

plugs, e.g. from the engine bung se- VAS 6122- .

♦ After an accidenin which there was no damage to the receiv‐

er.

♦ Repairs are performed quickly (nofor longer than the normal

repair time).

♦ The vehicle is no more than 5 years old.

1. Refrigerancircui

79

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

The receiver or dryer cartridge should be renewed under the fol‐

lowing circumstances:

♦ The refrigerancircuihas been opened for an indeterminate

period (seepage leak).

♦ The receiver is damaged (e.g. in an accident).

♦ Repairs are performed over a longer time than the normal re‐

pair time.

♦ The refrigerancircuiwas opened and the vehicle is more than

5 years old.

♦ The refrigerancircuihas been blown through with nitrogen.

♦ The refrigerancircuihas been flushed with R1234yf.

♦ The air conditioner compressor seizes.

•

All components of the refrigerancircuithawere submitted to

quality monitoring musbe sealed (use the original sealing

caps from the replacemenpart).

•

Renew damaged or leaky components of the refrigerancircui

⇒ page 79 .

All components of the refrigerancircuithawere submitted to

quality monitoring musbe sealed (use the original sealing

caps from the replacemenpart).

•

The replacemenair conditioner compressor, receiver, evap‐

orator and condenser were previously charged with nitrogen.

This filling is being gradually discontinued, or the pressure of

the nitrogen filling is so low thaescaping gas is no longer

perceptible when the paris initially opened.

Where vehicles are fitted with an air conditioner compressor

withoua magnetic clutch, the engine should be started only

when the refrigerancircuihas been fully assembled (since

lk

the air conditioner compressor will always run when the engine

is running) .

The air conditioner compressor with air conditioner compres‐

sor regulating valve - N280- (withouair conditioning system

magnetic clutch - N25- ) is switched to internal lubrication in

the evenof an empty refrigerancircuit, in which case only a

small amounof oil is pumped from the air conditioner com‐

pressor into the circuit.

80

Rep. gr.87 - Air conditioning system

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

♦ The following replacemenparts (air conditioner compressor,

receiver, evaporator and condenser) could be filled with nitro‐

gen gas, though this filling is noalways guaranteed. There‐

fore, little or no pressure equalisation may be perceived when

the sealing plugs of the replacemenparare unscrewed.

♦ Depending on the storage location and storage period, iis

possible on components filled with nitrogen ex-works tha

barely any pressure equalisation - if aall - is perceptible and,

as such, nothing can be said abouthe leak-tightness of the

component. This means, for example, thathe nitrogen gas

filling could escape through the shafseal of a replacemenair

conditioner compressor in the course of time, even though the

air conditioner compressor is leak-tight.

♦ Since spare parts are sometimes stored for long periods in

various places, there is a good chance thagas may escape

from some parts when firsopened bunofrom others (even

of the same parnumber). Therefore, be careful when un‐

screwing the sealing plugs from the replacemenparconnec‐

tions and allow the nitrogen gas to escape slowly.

♦ One or 2 expansion valves and a receiver or desiccancon‐

tainer are installed in the refrigerancircui⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerancircuit; System over‐

view - refrigerancircui.

♦ Renew the desiccancartridge or components with desiccan

bag (receiver) after cleaning the refrigerancircui(flush with

R1234yf refrigeran

⇒ “1.6 Cleaning refrigerancircuit”, page 92 ). When doing

so, keep the circuiclosed for as long as possible to keep the

ingress of moisture as low as possible.

♦ Seal open connections and pipes (to prevenabsorption of

moisture).

lk

Note

Contaminated refrigeranoils are to be disposed of as used oil of

unknown origin (observe local regulations) ⇒ VW / Audi Service‐

Ne.

1.5.2

Renewing leaking or damaged compo‐

nents of empty refrigerancircui(apar

from air conditioner compressor and re‐

ceiver)

The refrigerancircuiwas completely empty (e.g. larger leaks or

ruptured hose line)

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

1. Refrigerancircui

81

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

♦ If there is jusa small leak and the refrigeranonly escaped in

small quantities (e.g. small leakage point), the amounof re‐

frigeranoil thaescapes and the degree of moisture ingress

are noenough to impair the function of the air conditioning

system once the repair has been carried out.

♦ The measures marked with * should only be performed if leaks

are more pronounced (e.g. following an accident).

Electrical air conditioner compressor

– Remove defective componen* ⇒ Heating, air conditioning;

Rep. gr. 87 ; Refrigerancircuit; System overview - refrigeran

circui.

– Remove electrical air conditioning compressor and clean

(flush with R1234yf refrigerant) *

⇒ “1.6 Cleaning refrigerancircuit”, page 92 and ⇒ Heating,

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

moving and installing electrical air conditioning compressor

(vehicle-specific workshop manual).

– Clean the refrigerancircui(flush with R1234yf refrigerant)*

⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

– Completely charge the air conditioner compressor or refriger‐

ancircuiwith the requisite amounof oil

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerancircuit”, page 85 and ⇒ Heating, air condi‐

tioning; Rep. gr. 00 ; Technical data (approved refrigeranoils

and fill capacities for refrigeranoil in vehicle-specific work‐

shop manual).

lk

Mechanical air conditioner compressor

– Remove defective componen* ⇒ Heating, air conditioning;

Rep. gr. 87 ; Refrigerancircuit; System overview - refrigeran

circui.

– Remove air conditioner compressor.* ⇒ Heating, air condi‐

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

82

Rep. gr.87 - Air conditioning system

th

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

lk

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

– Unscrew oil drain plug -B- / -D- from air conditioner compres‐

sor -A-.*

Note

♦ The design of the oil drain plug -B- / -D- and seal -C- / -E- may

vary (depending on the manufacturer of the air conditioner

compressor) ⇒ Heating, air conditioning; Rep. gr. 87 ; Air

conditioner compressor (vehicle-specific workshop manual).

♦ When installing the oil drain plug -B-/-D-, observe the corre‐

sponding torque specification (depending on the manufacturer

of the air conditioner compressor and the design of the oil drain

plug). Please note thathe oil drain plug of air conditioner

compressors manufactured by Denso and Delphi is equipped

with an oil seal ⇒ Heating, Air conditioning; Rep. gr. 87 ; Air

conditioning compressor, Assembly overview - drive uniof air

conditioner compressor (currently valid specified torque:

30 Nm for “Denso” and 15 Nm for “Delphi” air conditioner com‐

pressor). The oil drain plug of air conditioner compressors

manufactured by “Sanden” and “Zexel- / Valeo” may be equip‐

ped with an O-ring or an oil seal (depending on the vehicle

equipment; currently valid specified torque: 10 Nm, respec‐

tively).

♦ On the Denso air conditioner compressor, for example, the oil

drain plug -D- has an oil seal -E-; renew ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Air conditioner compressor (vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

♦ On the Sanden air conditioner compressor, for example, the

oil drain plug -B- has a seal -C-; renew ⇒ Heating, air condi‐

tioning; Rep. gr. 87 ; Air conditioner compressor (vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

♦ If a seal (oil seal or O-ring) fitted to the oil drain plug is no

available as a replacemenpart, the removed old parcan be

reused (as an exception to the general rule of using new seals

only). The old seal, however, musalways be checked for

damage prior to installation. If any damage or deformation is

detected on the old seal, imusbe renewed with a commer‐

cially available new part.

♦ After filling the refrigerancircuit, check the installed oil drain

plug for leaks using e.g. an electronic leak detector.

♦ To speed up draining of the refrigeranoil, rotate the shafof

the air conditioner compressor e.g. using the belpulley or the

magnetic clutch pulley.

– Pour ouold refrigeranoil from the air conditioner compressor

*

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerancircuit”, page 85 (disposal ⇒ VW / Audi

ServiceNe).

1. Refrigerancircui

83

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

lk

All vehicles

Note

♦ Then pour new refrigeranoil in the air conditioner compressor

in a volume thaequates to the refrigeranoil in the replace‐

mencompressor * ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigeranoil .

♦ Differenrefrigeranoil and volumes for differenair condition‐

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

Technical data; refrigeranoil .

♦ To ensure proper lubrication of the air conditioner compressor

when iruns for the firstime, the air conditioner compressor

musbe filled with aleas40 cm³of refrigeranoil; the re‐

mainder can be poured e.g. into the new reservoir or receiver

or a refrigeranline ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigeranoil .

♦ If direnters the air conditioner compressor whilsthe refrig‐

erancircuiis open (e.g. after an accident), the air conditioner

compressor is to be renewed ⇒ Heating, air conditioning; Rep.

gr. 87 ; Air conditioner compressor .

♦ Clean the refrigerancircui(flush with R1234yf refrigerant) *

⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

– Renew desiccancartridge and receiver ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Refrigerancircuit; System overview -

refrigerancircui.

– Assemble the refrigerancircuit, evacuate and refill

⇒ page 129 .

1.5.3

Renewing leaking or damaged compo‐

nents of charged refrigerancircui

(aparfrom air conditioner compressor

and receiver)

There is still refrigeranin the refrigerancircui(e.g. the leak is

small)

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

– Drain refrigerancircui⇒ page 129 .

– Remove the defective part, blow through with compressed air

and collecany escaping refrigeranoil.

3

–

The refrigeranoil thais blown ou(plus 20 cm for the evap‐

3

orator, plus 10 cm for the condenser, refrigeranlines and

refrigeranhoses) should be poured into the new componen

as fresh refrigeranoil.

Note

Dispose of old refrigeranoil (observing local regulations) ⇒ VW /

Audi ServiceNe.

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

84

Rep. gr.87 - Air conditioning system

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

1.5.4

Renewing air conditioner compressor

with no need to clean refrigerancircui

Note

Clean the refrigerancircuit. In other words, flush with R1234yf

refrigeran⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

For example with external damage from an acciden

– Drain refrigerancircui

⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

– Remove air conditioner compressor ⇒ Heating, air condition‐

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

Electrical air conditioner compressor

– Flush the defective electrical air conditioning compressor to

remove the refrigeranoil (make a note of the volume of re‐

frigeranoil flushed out)

⇒ “2.11 Cleaning electrical air conditioning compressor”, page

155 .

lk

Note

♦ If the volume of refrigeranoil flushed ouof the defective air

conditioner compressor is more than 75% of thain the re‐

placemenair conditioner compressor, do noflush the re‐

placemenair conditioner compressor (a residual amoun

always remains in the air conditioner compressor, which

means thathe amounof refrigeranoil in the refrigerancircui

is negligible).

♦ If less than 75% of the specified amounof refrigeranoil is

flushed ouof the defective air conditioner compressor, the

remaining amounis still in the components of the refrigeran

circuit. To preventhe system from being overfilled with refrig‐

eranoil, the refrigerancircuior the electrical air conditioning

compressor is to be flushed.

– Flush the refrigerancircuior new electrical air conditioning

compressor to remove the refrigeranoil

⇒ “1.6 Cleaning refrigerancircuit”, page 92 and

⇒ “2.11 Cleaning electrical air conditioning compressor”, page

155 .

– Dispose of refrigeranoil flushed ouof defective and new air

conditioner compressor / refrigerancircui⇒ VW / Audi Serv‐

iceNe(observe local regulations).

Note

The design of the electrical air conditioning compressor is such

thaflushing is a requisite to remove the refrigeranoil (the refrig‐

eranoil cannobe poured ouas is the case with mechanical air

conditioning compressors with oil drain plug)

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

frigerancircui(aparfrom air conditioner compressor and re‐

ceiver)”, page 81 .

1. Refrigerancircui

85

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

– Only fill the replacemenair conditioner compressor with fresh

refrigeranoil equivalento volume of oil thawas flushed ou

(from the defective air conditioner compressor).

Note

If for instance 70 cm³refrigeranoil was poured ouof the de‐

♦

fective air conditioner compressor, and 140 cm³oil was pour‐

ed ouof the replacemenair conditioner compressor (a small

quantity of refrigeranoil remains in the air conditioner com‐

pressor and potentially in the air conditioner service station ).

lk

The air conditioner compressor to be installed musbe filled

in this instance with 70 cm³of refrigeranoil (the refrigeranoil

flushed ouof the replacemenair conditioner compressor

musnobe used as imay have been contaminated in the air

conditioner service station ).

♦ Differenrefrigeranoils and volumes for differenair condi‐

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

Technical data .

♦ If quite a large amounof refrigeranoil was flushed ouof the

defective air conditioner compressor (more than approx.

40 cm ³), the remaining refrigeranoil can also be poured in

the evaporator, a refrigeranline or the reservoir/receiver/inner

heaexchanger ⇒ Heating, air conditioning; Rep. gr. 87 ; Re‐

frigerancircuit; System overview - refrigerancircui, ⇒

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

Mechanical air conditioner compressor

– Remove oil drain plug from air conditioner compressor ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit;

System overview - refrigerancircui.

Note

Differenversions of oil drain plug and corresponding seal (either

a seal or an O-ring may be installed, renew)

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

frigerancircui(aparfrom air conditioner compressor and re‐

ceiver)”, page 81 and ⇒ Electronic parts catalogue .

– To speed up draining of the refrigeranoil, rotate the shafof

the air conditioner compressor using e.g. the magnetic clutch

pulley.

– Pour ouold refrigeranoil from the air conditioner compressor

and dispose ⇒ VW / Audi-ServiceNe(observe local regula‐

tions).

– Remove oil drain screw from replacemenair conditioner com‐

pressor, pour ourefrigeranoil and replace iwith only the

quantity of fresh refrigeranoil equal to the amounof refrig‐

eranoil poured ouof the defective air conditioner compressor

⇒ “1.5.2 Renewing leaking or damaged components of empty

refrigerancircui(aparfrom air conditioner compressor and

receiver)”, page 81 .

86

Rep. gr.87 - Air conditioning system

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

If for instance 50 cm³refrigeranoil was poured ouof the de‐

♦

fective air conditioner compressor, and 100 cm³oil was pour‐

ed ouof the replacemenair conditioner compressor (a small

quantity of refrigeranoil remains in the air conditioner com‐

pressor), pour 50 cm³refrigeranoil into the replacemenair

conditioner compressor (the refrigeranoil previously poured

from the air conditioner compressor spare parmay be used).

♦ Differenrefrigeranoils and volumes for differenair condi‐

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

Technical data .

♦ If quite a large amounof refrigeranoil was poured ouof the

defective air conditioner compressor (more than approx. 50

cm ³), the remaining refrigeranoil can also be poured in the

evaporator or reservoir/receiver/inner heaexchanger ⇒ Heat‐

ing, air conditioning; Rep. gr. 87 ; Refrigerancircuit; System

overview - refrigerancircui.

All

lk

– Renew restrictor (only if installed in this refrigerancircuit).

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

1.5.5

Renewing air conditioner compressor

due to leaks or internal damage

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

Vehicles with high-voltage system (hybrid vehicles)

– Observe the risk category of the high-voltage system ⇒ Rep.

gr. 00 ; Risk category of the high-voltage system .

– Observe safety precautions when working on the high-voltage

system

⇒ “1.5 Safety measures for working on vehicles with high-volt‐

age system”, page 3 .

– Observe safety precautions when working in the vicinity of

high-voltage components

⇒ “1.6 Safety precautions when working in the vicinity of high-

voltage components”, page 4 .

All vehicles

Renew air conditioner compressor e.g. owing to noise from the

air conditioner compressor or lack of performance.

– Drain refrigerancircui⇒ page 129 .

– Remove air conditioner compressor ⇒ Heating, air condition‐

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

– Clean refrigerancircui(flush with R1234yf refrigerant)

⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

1. Refrigerancircui

87

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

♦ In the evenof internal damage (to the air conditioner com‐

pressor), check the refrigeranhoses and condenser. If con‐

taminated by swarf, for example, clean ^lt^khe refrigeranhoses

and condenser (flush with R1234yf refrigeran

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

eranhoses if necessary.

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

ume of refrigeranoil in the refrigerancircuimay be greater

than the volume in the replacemenair conditioner compres‐

sor. Replenish the refrigerancircuion these vehicles with the

amounof refrigeranoil necessary ⇒ Heating, air condition‐

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

manual).

♦ In the evenof a faulin the electronics of an electrical air con‐

ditioning compressor (e.g. control unifor air conditioning com‐

pressor - J842- defective), the refrigerancircuineed nobe

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

renewed withouthere being a requiremento clean the re‐

frigerancircui

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerancircuit”, page 85

– Renew desiccanbag/desiccancartridge (reservoir/receiver)

⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit;

System overview - refrigerancircui.

– Check expansion valve for contamination or corrosion, renew

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

erancircuit; System overview - refrigerancircui.

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

1.5.6

Renewing desiccancartridge / receiver

after cleaning refrigerancircui

Note

Installed in the receiver is usually a desiccancartridge or desic‐

canbag (depending on the layouof the refrigerancircuit) ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit; System

overview - refrigerancircui

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

Note

Clean the refrigerancircuit. In other words, flush with R1234yf

refrigeran⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

For example due to moisture ingress (the refrigerancircuiwas

open for too long) or contamination

– Drain refrigerancircui⇒ page 129 .

– Remove air conditioner compressor ⇒ Heating, air condition‐

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

88

Rep. gr.87 - Air conditioning system

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

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

Refrigerancircuit; System overview - refrigerancircui.

– Clean refrigerancircui(flush with R1234yf refrigerant)

⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

lk

Electrical air conditioner compressor

– Flush air conditioner compressor of old refrigeranoil

⇒ “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

Differenversions of oil drain plug and corresponding seal, renew

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

frigerancircui(aparfrom air conditioner compressor and re‐

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

Refrigerancircuit; System overview - refrigerancircui(vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

– To speed up draining of the refrigeranoil, rotate the shafof

the air conditioner compressor e.g. using the belpulley or the

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

87 ; Air conditioner compressor .

– Pour ouold refrigeranoil from air conditioner compressor

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerancircuit”, page 85 .

Note

Dispose of old refrigeranoil (observing local regulations) ⇒ VW /

Audi ServiceNe.

All air conditioner compressors

– Check expansion valve for contamination or corrosion, renew

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

erancircuit; System overview - refrigerancircui.

– Then fill the air conditioner compressor with new refrigeranoil

by the same amounof refrigeranoil filled in the replacemen

air conditioner compressor (or by the specified amounof re‐

frigeranoil if the vehicle is fitted with 2 evaporators) ⇒

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

frigeranoil .

1. Refrigerancircui

89

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

♦ Differenrefrigeranoils and volumes for differenair 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 iruns for the firstime, the air conditioner compressor

musbe filled with aleas40 cm³of refrigeranoil; the re‐

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

reservoir/receiver/inner heaexchanger

⇒ “1.5.1 General information abourenewing components”,

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

data .

♦ If direnters the air conditioner compressor while the refriger‐

ancircuiis open (e.g. after an accident), the refrigerancircui

musbe cleaned and the air conditioner compressor renewed

⇒ “1.6 Cleaning refrigerancircuit”, page 92 and ⇒ Heating,

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

♦ On vehicles with 2 evaporators, the volume of refrigeranoil in

the refrigerancircuimay be greater than the volume in the

replacemenair conditioner compressor. Replenish the refrig‐

erancircuiwith the amounof refrigeranoil necessary ⇒

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

specific workshop manual).

lk

– Renew desiccanbag/desiccancartridge (receiver) ⇒ Heat‐

ing, air conditioning; Rep. gr. 87 ; Refrigerancircuit; System

overview - refrigerancircui.

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

1.5.7

Renewing receiver with no need to clean

refrigerancircui

Note

Installed in the receiver is usually a desiccancartridge or desic‐

canbag (depending on the layouof the refrigerancircuit) ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit; System

overview - refrigerancircui

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

Note

Clean the refrigerancircuit. In other words, flush with R1234yf

refrigeran⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

♦ For example, refrigeranhas leaked oubuno dirhas entered

the circuit.

♦ If the gas analysis shows thacontaminated refrigeranwas in

the circuibuthere appears to be no problem with the function

of the air conditioning system

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

– Drain refrigerancircui⇒ page 129 .

90

Rep. gr.87 - Air conditioning system

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

– Remove receiver ⇒ Heating, air conditioning; Rep. gr. 87 ;

Refrigerancircuit; System overview - refrigerancircui.

– Remove dirfrom receiver.

lk

– Weigh removed receiver.

– Fill enough refrigeranoil into the new receiver so thaihas

the same weighas the item thawas removed.

– Install new receiver ⇒ Heating, air conditioning; Rep. gr. 87 ;

Refrigerancircuit; System overview - refrigerancircui.

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

1.5.8

Renewing desiccancartridge / desic‐

canbag with no need to clean refriger‐

ancircui

Note

Desiccancartridges or desiccanbags are usually installed de‐

pending on the layouof the refrigerancircui⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerancircuit; System overview -

refrigerancircui

♦ Observe the general information abourenewing components

⇒ “1.5.1 General information abourenewing components”,

page 79

Note

Clean the refrigerancircuit. In other words, flush with R1234yf

refrigeran⇒ “1.6 Cleaning refrigerancircuit”, page 92 .

♦ For example, refrigeranhas leaked oubuno dirhas entered

the circuit.

♦ If the gas analysis shows thacontaminated refrigeranwas in

the circuibuthere appears to be no problem with the function

of the air conditioning system

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

– Drain refrigerancircui⇒ page 129 .

– Renew desiccancartridge/desiccanbag ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Refrigerancircuit; System overview -

refrigerancircui(vehicle-specific workshop manual).

Note

If the desiccancartridge/desiccanbag is permanently installed

in a componen(e.g. in the receiver on the condenser) and canno

be renewed individually, renew the receiver or condenser ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit; System

overview - refrigerancircui.

– Assemble the refrigerancircuit, evacuate and charge

⇒ page 129 .

1. Refrigerancircui

91

th

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

lk

1.6

Cleaning refrigerancircui

⇒ “1.6.1 General information aboucleaning refrigerancircuit”,

page 92

⇒ “1.6.2 Preparations for cleaning refrigerancircui(flushing with

R1234yf refrigerant)”, page 94

⇒ “1.6.3 Refrigerancircuicleaning procedure”, page 96

⇒ “1.6.4 Principle circuidiagrams for cleaning (flushing circuits)

- refrigerancircuiwith expansion valve and receiver”,

page 97

⇒ “1.6.5 Principle circuidiagrams for cleaning (flushing circuits)

- refrigerancircuiwith restrictor and receiver (withouhigh-volt‐

age system)”, page 102

⇒ “1.6.6 Principle circuidiagrams for cleaning (flushing circuits)

- vehicles with high-voltage system (withouauxiliary air condi‐

tioning functions)”, page 105

⇒ “1.6.7 Principle circuidiagrams for cleaning (flushing circuits)

- vehicles with high-voltage system (with auxiliary air conditioning

functions, e.g. heapump mode)”, page 105

⇒ “1.6.8 Adapters for setting up flushing circuits”, page 105

⇒ “1.6.9 General information aboublowing through with com‐

pressed air or nitrogen”, page 120

⇒ “1.6.10 Blowing through refrigerancircuiwith compressed air

or nitrogen”, page 124

1.6.1

General information aboucleaning re‐

frigerancircui

Note

♦ Work on the refrigerancircuithainvolves the air conditioner

service station can usually be carried ouwithouthe need to

de-energise the high-voltage system.

♦ Since certain components have to be removed to clean (flush)

the refrigerancircuit, the high-voltage system musbe de-

energised before work commences ⇒ Electrical system -

hybrid; Rep. gr. 93 ; Electric drive; General warning notices

for work on high-voltage system .

♦ If there is reason to believe thachemical substances (leak

stop additives) have been poured in the refrigerancircui(tha

is be flushed) to seal leaks, do noconnecyour air conditioner

service station to this refrigerancircuiand do noflush this

refrigerancircuit.

♦ Chemical substances (leak stop additives) used to seal leaks

form deposits in the refrigerancircuit. These can impair the

function of the air conditioning system and cause the air con‐

ditioning system (and your air conditioner service station) to

fail.

♦ Bring the customer's attention to the presence of substances

in the air conditioning system thaare noapproved by Volks‐

wagen/Audi, which preventhe air conditioning system from

being flushed and repaired.

92

Rep. gr.87 - Air conditioning system

th

Air conditioning system Refrigerant circuit -> 1.5 Renewing components for Your Volkswagen Sharan VAN Second Generation (2010-2023)

Related Topics

Air conditioning system Refrigerant circuit

Popular Owner Manuals

Latest Owner Manuals