Get Working with air conditioner service station -> 2.11 Cleaning electrical air conditioning compressor Guide for Volkswagen Scirocco SUV Third Generation (2008-2017)

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

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

service station ⇒ Operating instructions air conditioner service

station .

– Drain the refrigerant from the air conditioner service station to

be emptied into a different air 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 refrigerant in 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 out a 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 refrigerant oil

cannot be poured out (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 refrigerant

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

in the opposite direction of flow is not possible due to the in‐

tegrated valves).

♦ The air conditioner compressor must be positioned for flushing

so that the connection for the refrigerant line on the high pres‐

sure side is at the lowest point possible.

2. Working with air conditioner service station

155

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

Air conditioning systems with refrigerant R1234yf - 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 without

flushing program is

used, the sequence has

to be carried out man‐

ually (evacuate, flush

4 times with at least 2 kg

of refrigerant each time

and extract refrigerant

again, evacuate).

2 - Refrigerant hose 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 refrigerant circuit

(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 refrigerant

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

❑ From adapter case VW/Audi passenger vehicle set

4 - Refrigerant line

❑ 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 inlet to high pressure

outlet)

❑ In order to flush as much refrigerant oil out of the air conditioner compressor as possible, make sure that

the high pressure outlet of the air conditioner compressor is in the lowest position possible

Note

♦ Depending on the air conditioner

compressor, a new air condition‐

er compressor might be filled

with quite a large amount of re‐

frigerant oil (see manufacturer

plate on air conditioner compres‐

sor and

⇒ “5.2 Refrigerant oil capacities”,

page 15 ).

156

Rep. gr.87 - Air conditioning system

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

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

♦ On a new air conditioner com‐

pressor filled with more than

150 cm , pour out as much re‐

frigerant oil 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 refrigerant oil is poured

out of a new air conditioner com‐

pressor into a clean container and

this is subsequently sealed air-tight,

the refrigerant oil can be re-used to

top-up the refrigerant oil volume in

the circuit.

6 - Refrigerant line

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

❑ Use a refrigerant line e.g. with part number 7L6 820 721 BF to set-up the flushing circuit ⇒ 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 set

8 - Charging hose of flushing device for refrigerant circuits

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

ameter) to inlet of flushing device for refrigerant circuits.

9 - Flushing device for refrigerant circuits

❑ Different versions and different design of flushing devices for refrigerant circuits ⇒ Electronic parts cata‐

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

❑ With filter, sight glass, safety valve, heating, refrigerant tank, etc. (depending on version).

❑ Depending on the layout of the air conditioner service station and the flushing device for refrigerant

circuits, there may be a service coupling for refrigerant circuits fitted at the outlet and in some cases at

the inlet of the flushing device. If a service connection with a valve is installed to the outlet of the flushing

device, this valve must be opened completely when the service coupling is connected. If the valve is not

opened completely, it restricts the refrigerant flow.

❑ If there is a connection for a service coupling fitted at the inlet of the flushing device, the inlet must be

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

Note

A service coupling and a valve in the

inlet of the flushing device restrict

the refrigerant flow from the vehicle

into the flushing device.

10 - Refrigerant hose of air conditioner service station

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

the flushing device for refrigerant circuits.

2.12

Cleaning refrigerant circuit

– Perform preparatory measures for cleaning (flushing with

R1234yf refrigerant)

2. Working with air conditioner service station

157

Working with air conditioner service station -> 2.11 Cleaning electrical air conditioning compressor for Your Volkswagen Scirocco SUV Third Generation (2008-2017)

Related Topics

Working with air conditioner service station

Popular Owner Manuals

Latest Owner Manuals