Get Air conditioning system -> 2.8 Switching off air conditioner service station and separating from 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

conditioner service station ). The filling accuracy of the air

conditioner service station may be affected.

•

The refrigerant circuit is completely assembled ⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerant circuit; System over‐

view - refrigerant circuit .

– On vehicles with high-voltage system, switch off stationary air

conditioning function (deactivate) ⇒ Owner's Manual .

– Switch off ignition.

– Connect the air conditioner service station to the power sup‐

ply.

– Check the volume of refrigerant, the volume of refrigerant oil

and the amount of UV leak detection additive in the air condi‐

tioner service station and replenish as necessary ⇒ Operating

instructions air conditioner service station .

In addition for vehicles with electrically-actuated valves in the re‐

frigerant circuit that are not open when de-energised:

Note

On vehicles with high-voltage system and auxiliary air condition‐

ing system functions (“heat pump mode” or “cooling of high-

voltage battery”), valves may be installed in the refrigerant circuit

that are not open when de-energised. These valves are opened

and closed e.g. via incremental motors and are no longer actu‐

ated when the ignition is switched off. To empty the refrigerant

circuit completely or to evacuate and charge it correctly, however,

no areas must be isolated. Therefore, these valves must be

opened before performing these types of work ⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-specific

workshop manual) and ⇒ Vehicle diagnostic tester in “Guided

Fault Finding” mode.

– Use the vehicle diagnostic tester to open the electrically-ac‐

tuated valves that are not open when de-energised ⇒ Vehicle

diagnostic tester in “Guided Fault Finding” mode.

All vehicles

– Bring the air conditioner service station into operation as de‐

scribed in the instructions ⇒ Operating instructions air condi‐

tioner service station .

– Unscrew the sealing caps from the service connections of the

refrigerant circuit (see vehicle-specific refrigerant circuit) ⇒

Heating, air conditioning system; Rep. gr. 87 ; Refrigerant cir‐

cuit (vehicle-specific workshop manual).

– Connect quick-release couplings to the service connections of

the refrigerant circuit

⇒ “2.2 Connecting air conditioner service station to refrigerant

circuit”, page 131 .

– Evacuate the refrigerant circuit with the air conditioner service

station ⇒ “2.5 Evacuating refrigerant circuit”, page 140 .

– Adjust the requisite amount of refrigerant, the amount of re‐

frigerant oil to be replenished if necessary and the amount of

UV leak detection additive in the air conditioner service station

⇒ Operating instructions air conditioner service station , ⇒

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

specific workshop manual).

– Choose the relevant setting on the air conditioner service sta‐

tion for charging on the high pressure side ⇒ Operating

instructions air conditioner service station .

2. Working with air conditioner service station

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147

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

When charging the refrigerant circuit on the low pressure side,

liquefied refrigerant could accumulate in the compression cham‐

ber of the air conditioner compressor.

– Should it be necessary to charge the refrigerant circuit on the

low pressure side, turn the air conditioner compressor 10

times by hand before bringing into operation for the first time

after charging (if necessary, remove e.g. the drive belt to fa‐

cilitate this).

Note

♦ Refrigerant and refrigerant oil are charged in the refrigerant

circuit on the high pressure side.

♦ If a vehicle has no service connection on the high pressure

side of the refrigerant circuit, refrigerant can also be charged

via the service connection on the low pressure side. To do this,

however, always observe the setting and the operating in‐

structions of the air conditioner service station .

♦ If on an air conditioner service station the charging device

cannot be adjusted, unscrew (close) the handwheel on the

quick-release coupling adapter on the low pressure side if

necessary.

– Charge the refrigerant circuit with the requisite amount of re‐

frigerant, the amount of refrigerant oil that needs to be replen‐

ished if necessary and the amount of UV leak detection

additive.

– Bring the air conditioning system into operation after charging

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

Bringing air conditioning system into operation after charging

refrigerant circuit (vehicle-specific workshop manual) and

⇒ “2.7 Bringing air conditioning system into service after

charging”, page 149

Bringing air conditioning system with electrical air conditioning

compressor into operation

– Bring the air conditioner compressor into operation via “Basic

setting, compressor run-in” function in guided fault finding

⇒ Vehicle diagnostic tester.

In addition for vehicles with electrically-actuated valves in the re‐

frigerant circuit that are not open when de-energised:

– Use the vehicle diagnostic tester to enable (open or close) the

electrically-actuated valves - that are not open when de-ener‐

gised - for operation of the air conditioning system via the

respective control unit ⇒ Vehicle diagnostic tester in “Guided

Fault Finding” mode.

148

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

Note

On vehicles with high-voltage system and auxiliary air condition‐

ing system functions (“heat pump mode” or “cooling of high-

voltage battery”), valves may be installed in the refrigerant circuit

that are not open when de-energised. These valves are opened

and closed e.g. via incremental motors and are no longer actu‐

ated when the ignition is switched off. To completely empty,

correctly evacuate and charge the refrigerant circuit, however, no

areas may be isolated. Therefore, these valves must be opened

before these measures are carried out. On completion of the

work, enable actuation of these valves again via the respective

control unit ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant

circuit (vehicle-specific workshop manual) and ⇒ Vehicle diag‐

nostic tester in “Guided Fault Finding” mode.

All vehicles

If it is necessary to perform a function check after charging the

refrigerant circuit:

– Check the pressures in the refrigerant circuit ⇒ page 170 .

If it is not necessary to perform a function check after charging

the refrigerant circuit:

– Detach the air conditioner service station from the refrigerant

circuit and switch off

⇒ “2.8 Switching off air conditioner service station and sepa‐

rating from refrigerant circuit”, page 151 .

2.7

Bringing air conditioning system into

service after charging

Note

♦ If the mechanical air conditioner compressor was removed,

turn it approx. 10 times by hand before initial operation (during

installation or after installation e.g. before fitting the belt) so

that no damage is caused from a fluid shock when it is switch‐

ed on the first time (if there is refrigerant oil in the cylinder of

the air conditioner compressor, this will be forced out by turn‐

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

compressor; Removing and installing air conditioner compres‐

sor .

♦ If the electrical air conditioner compressor was removed, be‐

fore bringing the air conditioning system into operation for the

first time and after charging, the air conditioner compressor is

to be brought into operation via the “Basic setting, compressor

run-in” function in guided fault finding ⇒ Vehicle diagnostic

tester in “Guided Fault Finding” mode - air conditioning system

and battery regulation. This prevents damage to the air con‐

ditioner compressor, e.g. from a fluid shock, during initial

activation (if there is refrigerant oil in the compression cham‐

ber of the air conditioner compressor, this will be forced out).

♦ The mechanical air conditioner compressor is driven by the

engine via a belt or a shaft. The electrical air conditioner com‐

pressor is driven by an electric motor mounted directly on the

air conditioner compressor (e.g. on vehicles with hybrid drive)

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

pressor; Removing and installing air conditioner compressor .

2. Working with air conditioner service station

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Air conditioning system -> 2.8 Switching off air conditioner service station and separating from refrigerant circuit for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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