CO2 WorkshopCO2 Workshop

Preparing the service sector for the introduction of alternative refrigerants

Preparing the service sector for the introduction of alternative refrigerants

IdentificationDiagnosis

Leak detectionRecovery/Recycling

RepairRecharge

IdentificationDiagnosis

Leak detectionRecovery/Recycling

RepairRecharge

Considerations, procedures, tools in A/C service environment

Considerations, procedures, tools in A/C service environment

Refrigerantidentificationcritical beforeservice begins

Refrigerantidentificationcritical beforeservice begins

Mobile air conditioning systems may contain CFC-12, HFC-134a,

any of a number of blends, hydrocarbons, or a mixture of any

of the above.

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System diagnosis System diagnosis

System pressures are normally a starting point for diagnosis of mobile A/C system problems.

Electronic leak detection

Electronic leak detection

Detection and repair of air conditioning system leaks can

prevent further system damage.

Recovery/Recycling Recovery/Recycling

Complete refrigerant recovery is

important in critical charge

systems.

Systemrepair

Systemrepair

But it’s just a simple Chevy…

But it’s just a simple Chevy…(Tech Talk on iATN) A new body control module repaired the A/C problem. Alldata never mentions this in diagnostic charts nor does GM. If you look at wiring diagram for compressor you will see it there. Signal is supplied from HVAC module to BCM on dark green/white wire in small gray connector, then back out on light green A5 wire in pink connector through DLC and on to PCM. DVOM showed power in to bcm but none coming out. Replaced bcm. Reprogram and relearn, had to recalibrate radio, can only be done with Tech2. Customer called back tonight and said air bag light stays on, probably more relearn to do. A/C still working fine though, very expensive fix when customer thought all he needed was a refrigerant charge. Used all GM parts, have learned that the hard/stubborn way. Problems with the refrigerant

circuit and components is usually simple. The challenge today is

electronics.

Recharge Recharge

Accurate A/C system charge ensures proper

system operation and performance.

Shopequipment,tools

Shopequipment,tools

Lifts, jacks,power tools

ShopchemicalsShopchemicals

Solvents, cleaners, paint, propane

ShopventilationShopventilation

Changes with the seasons

ShopproceduresShopprocedures

Brazing, cutting, soldering, welding

Underhood hazardsUnderhood hazards

Exposed belts, pulleys and fans present

danger of physical trauma. Burns and electrical shock are

also concerns.

Underhood hazardsUnderhood hazards

Fans start without warning by

thermostats and other controls (or

even remote signal).

Good adviceGood advice

Next?Next? Service sector up to the challenge