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. |
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|
|
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:
Protecting
Caution
Missing protection leads to the electrical system
damage.
Note
All threaded connections must be tightened to the specified
torque.
...
Front view
Fig. 2 Overview of the front of the
vehicle
Key for :
Rain/light sensor on the mirror base
Windscreen
Windscreen wiper
Bonnet
Bonnet release lever
Headlights
Headlight washer system
Mounting for the front towing eye behind
a cover
Front number plate holder
F ...
Checklist
Please note the following for the cleaning and maintenance of the
seat covers :
Before getting into the vehicle, close all
Velcro fasteners that could touch the cloth seat covers and fabric trims. Open
Velcro fasteners can cause damage to cloth seat covers and fabric trims.
Avoid ...
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