Get Air conditioning system Working with air conditioner service station -> 2.6 Charging refrigerant circuit Guide for Volkswagen Sharan VAN Second Generation (2010-2023)

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

– Charge the circuiwith 100 g of refrigeranand search for the

possible leak using an electronic leak tester

⇒ “1.4.2 Searching for leaks in refrigerancircuits using an

electronic leak detector”, page 69 or add an approved UV

contrassubstance to the refrigeranand search for the pos‐

sible leak in the circuiusing the leak detector system

⇒ “1.4.3 Searching for leaks with UV leak detection system”,

page 71 .

– Evacuate refrigerancircuiif necessary

⇒ “2.4 Emptying refrigerancircuit”, page 137

– Rectify the problem in the refrigerancircui⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerancircui(vehicle-specific

workshop manual).

– Evacuate the refrigerancircuiand observe the vacuum

gauge over an extended period. Only when a vacuum is main‐

tained can charging commence

⇒ “2.5 Evacuating refrigerancircuit”, page 140 .

If iis necessary after evacuating to perform work on the vehicle

for which the air conditioner service station is norequired:

– Detach the air conditioner service station from the refrigeran

circuiand switch off

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

rating from refrigerancircuit”, page 151 .

NOTICE

Risk of damage to air conditioner compressor with negative

pressure in the refrigerancircuit.

– Never starthe engine if there is negative pressure in the

refrigerancircuit.

– Ensure that, until the refrigerancircuiis charged, the engine

cannobe started.

If after emptying and evacuating the refrigerancircuiis to be

recharged ⇒ “2.6 Charging refrigerancircuit”, page 146 .

2.6

Charging refrigerancircui

Note

♦ The whole amounof refrigerancan be charged either on the

high pressure side or the low pressure side. Charging of the

refrigerancircuiis described as follows for the high pressure

side.

♦ Fill capacities of refrigeranand refrigeranoil ⇒ Heating, air

conditioning; Rep. gr. 00 ; Technical data .

•

The procedure described in the instruction manual for the air

conditioning service station is to be followed ⇒ Operating in‐

structions of air conditioner service station .

Before charging the system with refrigerant, the amounof re‐

frigeranoil musbe adjusted ⇒ Heating, air conditioning; Rep.

gr. 00 ; Technical data .

Ensure when charging the refrigerancircuithathe air con‐

ditioner service station is athe same level as the vehicle

whose refrigerancircuiis to be charged (no greater than 50

cm difference). If the heighdifference is too great, deviations

may occur between the amounof refrigerandisplayed and

the amounactually charged (depending on the version of air

146

Rep. gr.87 - Air conditioning system

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

conditioner service station ). The filling accuracy of the air

conditioner service station may be affected.

•

The refrigerancircuiis completely assembled ⇒ Heating, air

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

view - refrigerancircui.

– 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 refrigeranoil

and the amounof 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‐

frigerancircuithaare noopen when de-energised:

Note

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

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

voltage battery”), valves may be installed in the refrigerancircui

thaare noopen 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 refrigeran

circuicompletely or to evacuate and charge icorrectly, however,

no areas musbe isolated. Therefore, these valves musbe

opened before performing these types of work ⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerancircui(vehicle-specific

workshop manual) and ⇒ Vehicle diagnostic tester in “Guided

FaulFinding” mode.

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

tuated valves thaare noopen when de-energised ⇒ Vehicle

diagnostic tester in “Guided FaulFinding” 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

refrigerancircui(see vehicle-specific refrigerancircuit) ⇒

Heating, air conditioning system; Rep. gr. 87 ; Refrigerancir‐

cui(vehicle-specific workshop manual).

– Connect quick-release couplings to the service connections of

the refrigerancircui

⇒ “2.2 Connecting air conditioner service station to refrigeran

circuit”, page 131 .

– Evacuate the refrigerancircuiwith the air conditioner service

station ⇒ “2.5 Evacuating refrigerancircuit”, page 140 .

– Adjust the requisite amounof refrigerant, the amounof re‐

frigeranoil to be replenished if necessary and the amounof

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 relevansetting 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

147

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

When charging the refrigerancircuion the low pressure side,

liquefied refrigerancould accumulate in the compression cham‐

ber of the air conditioner compressor.

– Should ibe necessary to charge the refrigerancircuion the

low pressure side, turn the air conditioner compressor 10

times by hand before bringing into operation for the firstime

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

cilitate this).

Note

♦ Refrigeranand refrigeranoil are charged in the refrigeran

circuion the high pressure side.

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

side of the refrigerancircuit, refrigerancan 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

cannobe adjusted, unscrew (close) the handwheel on the

quick-release coupling adapter on the low pressure side if

necessary.

– Charge the refrigerancircuiwith the requisite amounof re‐

frigerant, the amounof refrigeranoil thaneeds to be replen‐

ished if necessary and the amounof UV leak detection

additive.

– Bring the air conditioning system into operation after charging

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

Bringing air conditioning system into operation after charging

refrigerancircui(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 faulfinding

⇒ Vehicle diagnostic tester.

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

frigerancircuithaare noopen when de-energised:

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

electrically-actuated valves - thaare noopen when de-ener‐

gised - for operation of the air conditioning system via the

respective control uni⇒ Vehicle diagnostic tester in “Guided

FaulFinding” mode.

148

Rep. gr.87 - Air conditioning system

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

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

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

voltage battery”), valves may be installed in the refrigerancircui

thaare noopen 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 refrigerancircuit, however, no

areas may be isolated. Therefore, these valves musbe opened

before these measures are carried out. On completion of the

work, enable actuation of these valves again via the respective

control uni⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigeran

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

nostic tester in “Guided FaulFinding” mode.

All vehicles

If iis necessary to perform a function check after charging the

refrigerancircuit:

– Check the pressures in the refrigerancircui⇒ page 170 .

If iis nonecessary to perform a function check after charging

the refrigerancircuit:

– Detach the air conditioner service station from the refrigeran

circuiand switch off

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

rating from refrigerancircuit”, page 151 .

2.7

Bringing air conditioning system into

service after charging

Note

♦ If the mechanical air conditioner compressor was removed,

turn iapprox. 10 times by hand before initial operation (during

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

thano damage is caused from a fluid shock when iis switch‐

ed on the firstime (if there is refrigeranoil in the cylinder of

the air conditioner compressor, this will be forced ouby 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

firstime and after charging, the air conditioner compressor is

to be broughinto operation via the “Basic setting, compressor

run-in” function in guided faulfinding ⇒ Vehicle diagnostic

tester in “Guided FaulFinding” 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 refrigeranoil 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 belor 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

149

Air conditioning system Working with air conditioner service station -> 2.6 Charging refrigerant circuit for Your Volkswagen Sharan VAN Second Generation (2010-2023)

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