Volkswagen Polo Service & Repair Manual: Checking
– |
Connect pressure gauge battery (A/C service station). |
– |
Take pressure gauge readings. There are two possible results
A and B. |
|
|
|
Ambient
Temperature in °C (°F) |
Pressure in
Refrigerant Circuit in Bar (psi) Positive Pressure |
15 (60) |
3.9 (57) |
20 (68) |
4.7 (68) |
30 (86) |
6.7 (97) |
40 (104) |
9.1 (132) |
A- The pressure in the refrigerant circuit is lower than the
pressure specified in the table. There is not enough refrigerant
in the circuit. |
- Search for leak with leak detection device. |
- The pressure release valve is open, check coolant fan
activation according to the wiring diagram. |
Check refrigerant pipes and hoses to see if they are bent
too sharply (cross-section constrictions) or have external
damage. If no malfunction is found, flush refrigerant circuit. |
B - The pressure in the refrigerant circuit matches the
table or is higher. |
– |
Set A/C system to maximum cooling output. |
– |
Open vents in instrument panel. |
The A/C compressor is driven by the engine via the magnetic
clutch using the ribbed belt. |
Note
If the A/C compressor is not driven, check A/C Clutch -N25-
voltage supply. |
If the voltage supply is OK, repair the magnetic clutch. |
If the A/C compressor is driven, check refrigerant circuit: |
– |
Bring engine speed up to 2000 RPM. |
– |
Observe manometer battery: |
|
|
|
Increasing from pressure with engine not running to a
maximum of 20 bar (290 psi). |
Decreasing from pressure with engine not running down to 1.3
bar (18.9 psi). |
|
Radiator and condenser are clean (clean if necessary).
The ribbed belt for the A/C compressor and alternator
tensioned correctly.
...
Note
Connecting service station. Refer to
→ Chapter „Connecting Service Station“.
Observe test requirements ...
Other materials:
Removing and installing the headlights
Fig. 176 In the engine
compartment: securing bolts for the right headlight
Fig. 177 Guides for installing the
right headlight
First read and observe the introductory
information and safety warnings
Depending on the vehicle variant, the headlight may have to be removed in
order to replac ...
Refrigerant Circuit, General Precautions
Follow the instructions for the workplace. They should be
displayed in the workplace.
Ensure absolute cleanliness when working.
Wear work clothing, safety goggles and gloves when working
with refrigerant and ...
Securing child seats with a seat belt
First read and observe the introductory information
and safety warnings
It is permissible to fasten child seats with universal written
on the orange label to the seats using the seat belt, but only on the seats marked
in the table with a u.
Weight class
Front passe ...
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