Volkswagen Golf Service & Repair Manual: Detecting leaks
External damage can cause leaks in the refrigerant circuit. Because a small leak will involve only small quantities of refrigerant, leaks should be checked for using an electronic leak detector or by introducing a leak detection additive to the refrigerant circuit. Electronic leak detectors can detect leakage rates of less than 5 grams loss of refrigerant per year. The leak detector should be specific to the composition of the particular refrigerant in use. For example, a leak detector for R12 refrigerant is not appropriate for R134a refrigerant because R134a refrigerant has no chlorine atoms to which the lead detector responds.)
Charge factor
There must be space both for liquid and vapour in a
container. As the temperature rises, the liquid expands. The
space occupied by the vapour becomes smaller. Eventua ...
Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40%
depending on the type of air conditioner compressor and the
quantity of refrigerant) in the refrigerant. I ...
Other materials:
Function and operation by the user
Fig. 179 In the instrument cluster display:
Driver Alert System
First read and observe the introductory information
and safety warnings The Driver Alert System determines the driving behaviour
at the beginning of a journey and uses it to evaluate the tiredness of the driver.
This is comp ...
Windscreen wiper lever
Fig. 86 Operating the front windscreen
wiper
Fig. 87 Operating the rear window wiper
First read and observe the introductory information
and safety warnings
Move the lever into the required position :
Ⓐ
Switches off th ...
Renewing LSU Lambda probe (6-pin)
Note
If necessary, replace attachment parts, cable ties or
marking rings to match the uniform probe to the defective probe
as specified.
The wires should not be crimped or cut as otherwise the
function of the L ...
