Complaints; Possible Complaints About Refrigerant Circuit - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
8

Complaints

8.1 Possible complaints about refrigerant
circuit
Note
The air conditioning system is operating correctly if the air
♦
emerging from the vent on the dashboard is at a temperature
o
of 7 C or less.
Set the Climatronic to: "LO".
♦
Set the air conditioning system: "AC" on; "max"; "cold".
♦
8.1.1 Test prerequisites:
• Self-diagnosis of the air conditioning system with the Vehicle
diagnosis, testing and information system - VAS 5051A- using
"Guided Fault Finding" cannot detect any faults; no switch-off
conditions for the air conditioner compressor are set in the
measured value block (only when the vehicle "air conditioning
system" is fitted with self-diagnosis).
⇒ Rep. gr. 87
8.1.2 Possible complaints
Note
For all complaints marked with a *
♦ The cooling has failed completely. *
♦ Insufficient cooling at all vehicle speeds and engine speeds.*
♦ No cooling or insufficient cooling after a distance of several
kilometres has been driven. *
♦ The air conditioner compressor, the air conditioning system
magnetic clutch - N25- or the air conditioner compressor reg‐
ulating valve - N280- have been switched off by low-pressure
switch for magnetic clutch - F73- , high-pressure switch for
magnetic clutch - F118- , air conditioning system pressure
switch - F129- or by operating and display unit for Climatronic
air conditioning system - E87- or Climatronic control unit -
J255- because pressure was too high or too low.* *
♦ No fresh air flow, or very much reduced fresh air flow after
driving some distance (evaporator iced up). *
In addition the following complaints may also arise:
The air conditioner compressor is noisy
– Tighten the securing screws for the air conditioner compressor
and the air conditioner compressor bracket using a torque
wrench.
– Check routing of refrigerant pipes; they must not touch other
components and must be installed without tension (adjust if
necessary).
122
Rep. gr.00 - Technical data
⇒ page 127 .