2069806/5

Technical product information
Topic
Market
area
HVAC refrigerant leakage suspected or reports of a damp/musty smell within the cabin - Diagnosis guidelines
Australia E04 Bentley rest Asia and Australia (6E04),China 723 Volkswagen (Anhui) Automotive CO (6723),China 796 VW Import
Comp. Ltd (Vico), Beijing (6796),Germany E02 Bentley rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08
Bentley South Korea (6E08),United Arab Emirates E06 Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK
(6E01),United States E05 Bentley USA and rest America (6E05)
Bentley
Brand
Transaction
2069806/5
No.
Level
EH
Status
Approval
Release
date
New customer code
Object of complaint
air conditioning -> heating, cooling -> automatic A/C mode
air conditioning -> heating, cooling -> manual A/C mode
air conditioning -> cooling
Complaint type
Position
functionality -> cannot be activated
functionality -> without function / defect
component / consumables
New workshop code
Object of complaint
Complaint type
Position
air conditioning -> cooling -> evaporator leaks -> leaking
front
air conditioning -> cooling -> evaporator leaks -> leaking connection front
Vehicle data
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Brand Designation Engine code Gearbox code Final drive code
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Documents
Document name
master.xml
attachment2069806.pdf
hvacword.doc
Customer statement / workshop findings
HVAC not cooling / HVAC cooling less than expected / HVAC refrigerant leakage confirmed
Or
The customer reports a damp/musty smell within the cabin Note: For this scenario please see the pre requisites below
•
Should no HVAC leak be evident and a damp/musty smell has been reported/identified the operative should first confirm
that water is not leaking into the cabin please refer to all VIN applicable TPI’s
•
Should there be no water leaks evident, the operative should check the HVAC and body drains for blockages, in the
event the drains are blocked the drains must be unblocked, once this has been completed the operative should confirm
if the damp/musty smell is still evident
Hint: Should the damp/musty smell still be evident after the drains have been cleaned and/or water leaks have been repaired, the operative
should consider the smell could be related to accumulation of algae, fungus and/or mold on and around the evaporator, in this scenario the
operative must raise a DISS query requesting permission to clean the HVAC system
NOTICE
NOTICE:
In the event that HVAC cleaning products are required, these MUST be sourced locally. Before using the cleaner the operative must inform the
customer of the product which will be used, a neutral fragrance cleaner should be used as the customer may not like the smell of the cleaner
should a fragranced product be used
Please ensure all supporting information is included within the DISS query when requesting permission to clean the HVAC system including clear
photographs and/or videos showing the reported issue, should the required information not be supplied the warranty claim could be cancelled
Note: The retailer can conduct the cleaning process or a local HVAC specialist may be used to conduct the cleaning process, however this
would require permission via DISS before being conducted
CAUTION
NOTICE
Technical background
CAUTION
Before conducting any work on the HVAC system the operative MUST refer to the following within Rep.Gr 87
•
Refrigeration system - Safety and general information
It has been observed that some HVAC components have been incorrectly diagnosed and replaced, after the components were returned for
inspection no faults were found
CAUTION
NOTICE
Workshop diagnosis based on the customer complaint could be as follows:
•
HVAC is not cooling or the HVAC is not effective due to leakage of the refrigerant
•
Refrigerant recovered from the system shows a low volume or no refrigerant at all
•
Leakage is suspected from the compressor as no other leakage source was found
NOTICE
Figure 1
Figure 2
3
CAUTION
Figure 4
Or
A complaint is received that refrigerant is evident within the cabin the operative MUST first ensure that a leak is not evident within the plenum
chamber or around the centre console (Figures 5 and 6) as refrigerant could be leaking into the plenum chamber/cabin and recirculated back
into the cabin as this could lead to misdiagnosis and/or incorrect part replacement
Figure 5
Figure 6
In the event that leakage is suspected from the thermal expansion valve (TXV) the thermal expansion valve can be replaced
when the HVAC unit is fitted within the car
•
The operative must first refer to the attached flow chart before proceeding with any diagnosis or parts replacement
TIP: The attached document is for assistance in diagnosing the HVAC leak for issue relating to damp/musty smells within the
cabin please refer to the Customer statement/Workshop findings section of this TPI
•
Before conducting any work on the HVAC system the operative MUST refer to the following within Rep.Gr 87
•
Refrigeration system - Safety and general information
•
Refrigerant oil - Special instructions
•
Refrigeration system - To discharge and charge
IMPORTANT TIP: When a HVAC line/connection has been opened the operative MUST always cap/bung the applicable port using a suitable
cap/bung
CAUTION
•
Photograph and video of the r efrigerant quantity and the actual leakage location
Or
In the event the evaporator or compressor is not suspected as being at fault and the issue can be successfully diagnosed and repaired, please
raise a non technical DISS query stating the issue which was evident and how the issue was resolved
Production change
-
Measure
Refer to the Technical background section
Warranty accounting instructions
Time to conduct the initial checks within the Measure section
Warranty Type
110 or 910
Damage Service Number 87 01
Damage Code
00 50
Labour operation code
87 01 01 20
Time
50 TU
In the event that any parts are required to be replaced please refer to the warranty accounting instructions with Elsa pro this
is due to the numerous vehicle specification and symptom scenarios
NOTICE
NOTICE
NOTICE
Parts information
Refer to the ETKA parts catalogue for any additional parts requirements
NOTICE
Take photographs/videos to
showing a reduction or /no HVAC
Refrigerant
Confirm leakage source by HVAC
sniffer tool or leak detection
spray/Soapy water
Leakage Suspected at Evaporator
as not found in other part
Leakage
Other than Evaporator
Source
Replace affected part
Confirm Evaporator Leakage
Raise a Technical DISS Query requesting permission to
replace the evaporator
Yes
Replace Evaporator
INTERNAL
Leakage
present on
Evaporator
No
Do not Replace
Evaporator, continue
with further diagnosis