Get Air conditioning system Working with air conditioner service station -> 2.11 Cleaning electrical air conditioning compressor Guide for Volkswagen Sharan VAN Second Generation (2010-2023)

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

service station ⇒ Operating instructions air conditioner service

station .

– Drain the refrigeranfrom the air conditioner service station to

be emptied into a differenair conditioner service station , ob‐

serving the operating instructions of the air conditioner service

station to do so ⇒ Operating instructions air conditioner serv‐

ice station and

⇒ “2.13 Filling contaminated refrigeranin a recycling cylinder

for analysis, processing or disposal”, page 161 .

2.11

Cleaning electrical air conditioning com‐

pressor

Vehicles with high-voltage system

Observe the additional warnings for working on vehicles with

high-voltage system ⇒ Electrical system; Rep. gr. 93 ; General

warnings for work on the high-voltage system .

If repair work in the vicinity of high-voltage components and ca‐

bles is necessary, carry oua visual check for damage on high-

voltage components and cables, and observe the warnings ⇒

Electrical system; Rep. gr. 93 ; General warnings for work on the

high-voltage system .

If repair work on high-voltage components is necessary, de-en‐

ergise the high-voltage system ⇒ Electrical system; Rep. gr. 93 ;

De-energising high-voltage system , and “observe the general

warnings for work on the high-voltage system” ⇒ Electrical sys‐

tem; Rep. gr. 93 ; General warnings for work on the high-voltage

system .

Flushing air conditioner compressor

Note

♦ On an electrical air conditioning compressor, the refrigeranoil

cannobe poured ou(as there is no oil drain plug), i.e. the

design makes no allowance for the drainage of oil

♦ With an electrical air conditioning compressor, the refrigeran

oil is to be removed in the direction of flow by flushing (flushing

in the opposite direction of flow is nopossible due to the in‐

tegrated valves).

♦ The air conditioner compressor musbe positioned for flushing

so thathe connection for the refrigeranline on the high pres‐

sure side is athe lowespoinpossible.

2. Working with air conditioner service station

155

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

1 - Air conditioner service sta‐

tion

❑ With electronics and

flushing program, air

conditioner service sta‐

tion with flushing device

⇒ Electronic parts cata‐

logue .

❑ If an air conditioner

service station withou

flushing program is

used, the sequence has

to be carried ouman‐

ually (evacuate, flush

4 times with aleas2 kg

of refrigeraneach time

and extracrefrigeran

again, evacuate).

2 - Refrigeranhose of air con‐

ditioner service station

❑ From high pressure side

of air conditioner service

station (normally col‐

oured red) for connect‐

ing low pressure side of

air conditioner compres‐

sor to refrigerancircui

(larger diameter)

3 - Adapter to connection for

low pressure side on air condi‐

tioner compressor

❑ Different versions de‐

pending on vehicle

⇒ “1.6.8 Adapters for

setting up flushing cir‐

cuits”, page 105

❑ The item to be used be‐

tween the refrigeran

hose -2- and adapter -3- is adapter - VAS 6338/48- .

❑ From adapter case VW/Audi passenger vehicle se

4 - Refrigeranline

❑ For connection of air conditioner compressor to adapter ⇒ Item 3 (page 156)

5 - Electrical air conditioner compressor

❑ Flush the air conditioner compressor in normal direction of flow (from low pressure inleto high pressure

outlet)

❑ In order to flush as much refrigeranoil ouof the air conditioner compressor as possible, make sure tha

the high pressure outleof the air conditioner compressor is in the lowesposition possible

Note

♦ Depending on the air conditioner

compressor, a new air condition‐

er compressor mighbe filled

with quite a large amounof re‐

frigeranoil (see manufacturer

plate on air conditioner compres‐

sor and

⇒ “5.2 Refrigeranoil capacities”,

page 15 ).

156

Rep. gr.87 - Air conditioning system

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

♦ On a new air conditioner com‐

pressor filled with more than

150 cm³, pour ouas much re‐

frigeranoil as possible before

flushing.

♦ Reason: The oil volume to be

displaced in one work step may

be restricted depending on the

version of air conditioner service

station .

Note

If the clean refrigeranoil is poured

ouof a new air conditioner com‐

pressor into a clean container and

this is subsequently sealed air-tight,

the refrigeranoil can be re-used to

top-up the refrigeranoil volume in

the circuit.

6 - Refrigeranline

❑ For connection of air conditioner compressor to adapter ⇒ Item 7 (page 157)

❑ Use a refrigeranline e.g. with parnumber 7L6 820 721 BF to set-up the flushing circui⇒ Electronic

parts catalogue

7 - Adapter for connection on high pressure side of air conditioner compressor

❑ Different versions depending on vehicle ⇒ “1.6.8 Adapters for setting up flushing circuits”, page 105

❑ From adapter case VW/Audi passenger vehicle se

8 - Charging hose of flushing device for refrigerancircuits

❑ From connection to high pressure side of air conditioner compressor on refrigerancircui(smaller di‐

ameter) to inleof flushing device for refrigerancircuits.

9 - Flushing device for refrigerancircuits

❑ Different versions and differendesign of flushing devices for refrigerancircuits ⇒ Electronic parts cata‐

logue (Tools; Workshop equipment/tools; Air conditioning/heating)

❑ With filter, sighglass, safety valve, heating, refrigerantank, etc. (depending on version).

❑ Depending on the layouof the air conditioner service station and the flushing device for refrigeran

circuits, there may be a service coupling for refrigerancircuits fitted athe outleand in some cases a

the inleof the flushing device. If a service connection with a valve is installed to the outleof the flushing

device, this valve musbe opened completely when the service coupling is connected. If the valve is no

opened completely, irestricts the refrigeranflow.

❑ If there is a connection for a service coupling fitted athe inleof the flushing device, the inlemusbe

adapted to allow for the refrigeranhose coming from the vehicle to be connected directly.

Note

A service coupling and a valve in the

inleof the flushing device restric

the refrigeranflow from the vehicle

into the flushing device.

10 - Refrigeranhose of air conditioner service station

❑ From the low pressure side of the air conditioner service station (normally coloured blue) to the outleof

the flushing device for refrigerancircuits.

2.12

Cleaning refrigerancircui

– Perform preparatory measures for cleaning (flushing with

R1234yf refrigerant)

2. Working with air conditioner service station

157

Air conditioning system Working with air conditioner service station -> 2.11 Cleaning electrical air conditioning compressor for Your Volkswagen Sharan VAN Second Generation (2010-2023)

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