2015-2022 Volkswagen Touran 4 Door Air conditioning system -> 1.5.3 Renewing leaking or damaged components of charged refrigerant circuit User Manual
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Air conditioning system -> 1.5.3 Renewing leaking or damaged components of charged refrigerant circuit for Your 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  
The receiver or dryer cartridge should be renewed under the fol‐  
lowing circumstances:  
♦ The refrigerant circuit has 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 refrigerant circuit was opened and the vehicle is more than  
5 years old.  
♦ The refrigerant circuit has been blown through with nitrogen.  
♦ The refrigerant circuit has been flushed with R1234yf.  
♦ The air conditioner compressor seizes.  
•
All components of the refrigerant circuit that were submitted to  
quality monitoring must be sealed (use the original sealing  
caps from the replacement part).  
•
•
Renew damaged or leaky components of the refrigerant circuit  
⇒ page 79 .  
All components of the refrigerant circuit that were submitted to  
quality monitoring must be sealed (use the original sealing  
caps from the replacement part).  
•
•
•
The replacement air 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 that escaping gas is no longer  
perceptible when the part is initially opened.  
Where vehicles are fitted with an air conditioner compressor  
without a magnetic clutch, the engine should be started only  
when the refrigerant circuit has 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- (without air conditioning system  
magnetic clutch - N25- ) is switched to internal lubrication in  
the event of an empty refrigerant circuit, in which case only a  
small amount of oil is pumped from the air conditioner com‐  
pressor into the circuit.  
80  
Rep. gr.87 - Air conditioning system  
GETth  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
Note  
♦ The following replacement parts (air conditioner compressor,  
receiver, evaporator and condenser) could be filled with nitro‐  
gen gas, though this filling is not always guaranteed. There‐  
fore, little or no pressure equalisation may be perceived when  
the sealing plugs of the replacement part are unscrewed.  
♦ Depending on the storage location and storage period, it is  
possible on components filled with nitrogen ex-works that  
barely any pressure equalisation - if at all - is perceptible and,  
as such, nothing can be said about the leak-tightness of the  
component. This means, for example, that the nitrogen gas  
filling could escape through the shaft seal of a replacement air  
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 that gas may escape  
from some parts when first opened but not from others (even  
of the same part number). Therefore, be careful when un‐  
screwing the sealing plugs from the replacement part connec‐  
tions and allow the nitrogen gas to escape slowly.  
♦ One or 2 expansion valves and a receiver or desiccant con‐  
tainer are installed in the refrigerant circuit ⇒ Heating, air  
conditioning; Rep. gr. 87 ; Refrigerant circuit; System over‐  
view - refrigerant circuit .  
♦ Renew the desiccant cartridge or components with desiccant  
bag (receiver) after cleaning the refrigerant circuit (flush with  
R1234yf refrigerant  
⇒ “1.6 Cleaning refrigerant circuit”, page 92 ). When doing  
so, keep the circuit closed for as long as possible to keep the  
ingress of moisture as low as possible.  
♦ Seal open connections and pipes (to prevent absorption of  
moisture).  
lk  
Note  
Contaminated refrigerant oils are to be disposed of as used oil of  
unknown origin (observe local regulations) ⇒ VW / Audi Service‐  
Net .  
1.5.2  
Renewing leaking or damaged compo‐  
nents of empty refrigerant circuit (apart  
from air conditioner compressor and re‐  
ceiver)  
The refrigerant circuit was completely empty (e.g. larger leaks or  
ruptured hose line)  
♦ Observe the general information about renewing components  
⇒ “1.5.1 General information about renewing components”,  
page 79  
1. Refrigerant circuit  
81  
GETth  

Related Topics

Air conditioning system
1 Refrigerant circuit 1.1 System overview - refrigerant circuit 1.1.1 System overview - refrigerant circuit with expansion valve and receiver 1.1.2 System overview - refrigerant circuit with restrictor and reservoir 1.1.3 System overview - refrigerant circuit with electrically driven air conditioner compressor 1.2 General description - components of refrigerant circuit 1.2.1 Layout and function of refrigerant circuit 1.2.2 Mechanical air conditioner compressor 1.2.3 Electrical air conditioner compressor for hybrid vehicles 1.2.4 Condenser 1.2.5 Evaporator 1.2.6 Reservoir 1.2.7 Heat exchanger for heat pump mode 1.2.8 Liquid receiver 1.2.9 Restrictor 1.2.10 Receiver 1.2.11 Expansion valve (with and without shut-off valve) 1.2.12 Refrigerant shut-off valves 1.2.13 Refrigerant line with internal heat exchanger 1.2.14 Quick release couplings of refrigerant lines 1.2.15 Seals 1.2.16 Pipes and hoses in refrigerant circuit 1.2.17 High-pressure safety valve 1.2.18 Non-return valves 1.2.19 Quick-release coupling connections in refrigerant circuit 1.2.20 Connections with valve for switches in refrigerant circuit 1.2.21 Pressure senders and switches in refrigerant circuit 1.2.22 Refrigerant pressure and temperature sender 1.2.23 Air conditioner compressor regulating valve N280 1.2.24 Refrigerant temperature sender 1.3 Possible complaints 1.3.1 Prerequisites for investigating a complaint 1.3.2 Possible complaints 1.3.3 Odours from heater and air conditioner unit 1.4 Investigating leaks 1.4.1 General information about investigating leaks in the refrigerant circuit 1.4.2 Searching for leaks in refrigerant circuits using an electronic leak detector 1.4.3 Searching for leaks with UV leak detection system 1.4.4 Detecting leaks in a vacuum test using air conditioner service station, or in a pressure test 1.4.5 Detecting leaks in a pressure test (with nitrogen or compressed air) 1.5 Renewing components 1.5.1 General information about renewing components 1.5.2 Renewing leaking or damaged components of empty refrigerant circuit 1.5.4 Renewing air conditioner compressor with no need to clean refrigerant circuit 1.5.5 Renewing air conditioner compressor due to leaks or internal damage 1.5.6 Renewing desiccant cartridge / receiver after cleaning refrigerant circuit 1.5.7 Renewing receiver with no need to clean refrigerant circuit 1.5.8 Renewing desiccant cartridge / desiccant bag with no need to clean refrigerant circuit 1.6 Cleaning refrigerant circuit 1.6.1 General information about cleaning refrigerant circuit 1.6.2 Preparations for cleaning refrigerant circuit (flushing with R1234yf refrigerant) 1.6.3 Refrigerant circuit cleaning procedure 1.6.4 Principle circuit diagrams for cleaning (flushing circuits) - refrigerant circuit with expansion valve and receiver 1.6.5 Principle circuit diagrams for cleaning (flushing circuits) - refrigerant circuit with restrictor and receiver 1.6.6 Principle circuit diagrams for cleaning (flushing circuits) - vehicles with high-voltage system (without auxiliary) 1.6.7 Principle circuit diagrams for cleaning (flushing circuits) - vehicles with high-voltage system (with auxiliary) 1.6.8 Adapters for setting up flushing circuits 1.6.9 General information about blowing through with compressed air or nitrogen 1.6.10 Blowing through refrigerant circuit with compressed air or nitrogen 1.7 Checking pressures with pressure gauge 1.7.1 Display on pressure gauges 1.7.2 Pressure gauges enable the following test and measurement work 2 Working with air conditioner service station 2.1 Working with air conditioner service station 2.2 Connecting air conditioner service station to refrigerant circuit 2.3 Performing gas analysis of refrigerant 2.4 Emptying refrigerant circuit 2.5 Evacuating refrigerant circuit 2.6 Charging refrigerant circuit 2.7 Bringing air conditioning system into service after charging 2.8 Switching off air conditioner service station and separating from refrigerant circuit 2.9 Charging refrigerant in reservoir 2.10 Emptying air conditioner service station 2.11 Cleaning electrical air conditioning compressor 2.12 Cleaning refrigerant circuit 2.13 Filling contaminated refrigerant in a recycling cylinder for analysis, processing or disposal 2.13.1 Filling contaminated refrigerant in a recycling cylinder using technical equipment 2.13.2 Filling undercooled contaminated refrigerant in a recycling cylinder 2.14 Checking pressures 2.14.1 General information on checking pressures in the refrigerant circuit 2.14.2 Pressures and temperatures in refrigerant circuit 2.14.3 Checking pressures in the refrigerant circuit with the ignition switched off 2.14.4 Checking pressures with air conditioning system switched on - vehicles with mechanical air conditioning compressor 2.14.5 Checking pressures with air conditioning system switched on - vehicles with electrical air conditioning compressor 3 Testing equipment and tools 3.1 Tools and materials available from distribution centre or importer 3.2 Tools and materials available commercially 3.3 Tools that can be locally manufactured

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