Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...
Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017
Senders for connection to a refrigerancircuiwith valve
Note
♦ Refer to vehicle-specific refrigerancircuifor switching pres‐
sures, removing and installing switches and location/design of
switches ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigeran
circui(vehicle-specific workshop manual).
♦ These senders come in differenversions, with differenfunc‐
tions and differendesignations. The refrigeranpressure and
temperature sender - G395- shown as follows is installed e.g.
in the Golf GTE, Audi A4, Audi Q5 and Audi Q5 Hybrid ⇒
Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit;
System overview - refrigerancircui.
♦ Before loosening the threaded connection of the sender,
check which version of sender iis ⇒ Heating, air conditioning;
Rep. gr. 87 ; Refrigerancircuit; System overview - refrigeran
circui.
♦ For senders designed for connection to a refrigerancircui
withouvalve. The refrigeranmusbe extracted before the
threaded connection is loosened. If the sender is noremoved
within 10 minutes after the system has been evacuated, pres‐
sure may develop in the refrigerancircuidue to re-evapora‐
tion. Extracrefrigeranagain.
♦ Differendesignations depending on the function and vehicle
lk
⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerancircuit;
System overview - refrigerancircui.
♦ The sender for refrigeranpressure and refrigerantempera‐
ture is installed e.g. in place of the high pressure sender or
pressure sender for refrigerancircui⇒ Heating, air condi‐
tioning; Rep. gr. 87 ; Refrigerancircui(vehicle-specific work‐
shop manual)
♦ The sender for refrigeranpressure and refrigerantempera‐
ture, the pressure sender for refrigerancircuiand high pres‐
sure sender come in differenversions. Depending on the
version, they can currently only be distinguished externally by
the parnumber, which is why attention should be paid during
renewal to their correcallocation (parnumber ⇒ Electronic
parts catalogue ). Reason: These senders emidifferensig‐
nals, and the relevancontrol units can only evaluate the signal
to which they have been matched ⇒ Vehicle diagnostic tester
in “Guided FaulFinding” mode - air conditioning system and
⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerancircui
(vehicle-specific workshop manual).
♦ The sender for refrigeranpressure and refrigerantempera‐
ture (and the pressure sender for refrigerancircuit) exchange
information with the respective control univia the data bus
(e.g. “LIN bus”) when voltage is applied. The respective control
units use this information to calculate the pressure and tem‐
perature in the refrigerancircuit. Any faults detected in this
way are passed on to the control uni⇒ Vehicle diagnostic
tester in “Guided FaulFinding” mode.
♦ The sender for refrigeranpressure and refrigerantempera‐
ture transmits the measured valve for the pressure in the
refrigerancircuiand the measured temperature to the con‐
nected control unit. The pressure sender for refrigerancircui
only transmits the measured value for the pressure in the re‐
frigerancircuito the connected control unit. Even though on
mosvehicles only the pressure signal is evaluated, no other
pressure sender may be installed in a vehicle for which provi‐
sion is made for a refrigeranpressure and refrigerantem‐
perature sender ⇒ Electronic parts catalogue .
1. Refrigerancircui
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