ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
5
Air conditioner compressor
5.1
Exploded view - air conditioner compressor
1 - Air conditioner compressor
-VX81-
❑ ⇒ Rep. gr. 87; Remov‐
ing and installing air
conditioner compressor
VX81
2 - Electrical connector for
high-voltage system
❑ ⇒ Electric drive motor;
Rep. gr. 93; High-volt‐
age wires; Overview of
fitting locations - high-
voltage wires
3 - Electrical connector
4 - Bolt
❑ 8 Nm
5 - Potential equalisation line
❑ ⇒ Electric drive mo‐
tor; Rep. gr. 93; Poten‐
tial equalisation lines;
Overview of fitting loca‐
tions - potential equali‐
sation lines
6 - Bolt
❑ 3x
❑ 20 Nm
7 - Bracket
❑ ⇒ Rep. gr. 87; Detach‐
ing and attaching air
conditioner compressor
at bracket
8 - Bolt
❑ 4x
❑ 8 Nm
9 - Bolt
❑ 3x
❑ 20 Nm
10 - Bracket
❑ ⇒ Rep. gr. 87; Detaching and attaching air conditioner compressor at bracket
96
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
5.2
Removing refrigerant lines from and in‐
stalling to air conditioner compressor,
R1234yf
5.2.1
Detaching and attaching refrigerant
lines at air conditioner compressor
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Seal off open pipes/lines and connections immediately with
clean plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioners with refrigerant R1234yf - General infor‐
mation; Rep. gr. 87; Working with the air conditioner service
station; Discharging refrigerant circuit.
– Remove air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake box of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Remove bolts -3- and detach refrigerant lines -2-.
Installing
Installation is carried out in reverse order; note the following:
– Connect refrigerant lines -2- and tighten bolts -3-.
5. Air conditioner compressor
97
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– ⇒ Air conditioners with refrigerant R1234yf - General infor‐
mation; Rep. gr. 87; Working with the air conditioner service
station; Charging refrigerant circuit
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
5.3
Detaching/attaching refrigerant lines
from/to air conditioner compressor,
R744
5.3.1
Detaching and attaching refrigerant
lines at air conditioner compressor
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Seal off open pipes/lines and connections immediately with
clean plugs from engine bung set -VAS 6122-.
– Perform function “Opening electrically actuated valves in re‐
frigerant circuit for extracting, evacuating and charging” with
⇒ Vehicle diagnostic tester ⇒ Rep. gr. 00; Starting diagnosis.
– ⇒ Air conditioners with refrigerant R744 - General informa‐
tion; Rep. gr. 87; Working with the air conditioner service
station; Discharging refrigerant circuit.
– Remove air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake box of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Remove bolts -3- and detach refrigerant lines -2-.
98
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Installing
Installation is carried out in reverse order; note the following:
– Install seals and retaining elements, making sure they are
free of oil.
– Connect refrigerant lines -2- and tighten bolts -3-.
– Perform function “Opening electrically actuated valves in re‐
frigerant circuit for extracting, evacuating and charging” with
⇒ Vehicle diagnostic tester ⇒ Rep. gr. 00; Starting diagnosis.
– ⇒ Air conditioners with refrigerant R744 - General informa‐
tion; Rep. gr. 87; Working with the air conditioner service
station; Charging refrigerant circuit
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
5.4
Removing and installing air conditioner
compressor [VX81], R1234yf
5.4.1
Removing and installing air conditioner
compressor [VX81]
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
5. Air conditioner compressor
99
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
DANGER
High voltage can cause fatal injury.
Danger of severe or fatal injuries from electric shock or elec‐
tric arcs.
– Have a high-voltage technician (HVT) or a high-voltage
expert (HVE) de-energise the high-voltage system.
– ⇒ Rep. gr. 93; De-energise high-voltage system.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Remove air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
– Disconnect electrical connectors -2-, and unclip lines ⇒ Elec‐
tric drive motor; Rep. gr. 93; High-voltage cables; Discon‐
necting high-voltage connectors.
– Unscrew bolts -3-.
– Unscrew bolt -4-.
100
Rep. gr.87 - Air conditioning system
2024 VW ID.4 Owner's Manual
