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:
Infrared Dryer -VAS6876
Definition:
Infrared Dryer -VAS6876-
Product Description:
The infrared dryer is used to dry paste, filler, base paint,
top coats and clear coats on vertical and horizontal surfaces.
...
Certificate of Conformity
The vehicle manufacturer must request an EU type approval
for all passenger vehicles (vehicle class M1).
A certificate of conformity is produced based on this type
approval.
This document confirms that the vehicle confor ...
Introduction
This chapter contains information on the following subjects:
→ Preparing the vehicle for working in the engine compartment
→ Opening and closing the bonnet
Always park the vehicle on a level and stable surface before carrying out any
work in the engine compartment.
The engine ...
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Test Requirements
Checking with Restrictor, Reservoir and A/C Compressor Regulator Valve
-N280-, Externally Regulated A/C Compressor