Gauge Reading and Diagnosis

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Automotivr Air Conditioning Theory, ..............Procedures.......................And Diagnosis.

 

Learn to read gauges

"Servicing The World With Automotive Air Conditioning Theory and Diagnosis"

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Gauge Reading and Diagnosis

ALWAYS REMEMBER IF DEALING WITH ORIFICE TUBE SYSTEM

CHECK TO SEE IF BLACK DEATH HAS OR IS OCCURRING

Orifice tube sys.

EXP VALVE

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LOW SIDE   LOW

 

HIGH SIDE  LOW

CAUSE OF THIS TYPE OF READING                                                                                                                       

LOW FREON, POSSIBLE LEAKS

WHAT TO DO TO CORRECT

DISCHARGE SYSTEM, LOCATE LEAKS

AND REPAIR

EVACUATE AND RECHARGE

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LOW SIDE  L0 W OR IN A VACUUM                            *          LOW SIDE VERY LOW

HIGH SIDE LOW                                                               *        HIGH SIDE LOW, CAN READ NORMAL/HIGH

CAUSE OF THIS READING                                             *        CAUSE OF THIS READING

BAD EXPANSION VALVE OR ORIFICE TUBE             *        BAD LIQUID LINE OR ACCUMULATOR

WHAT TO DO TO CORRECT                                          *       WHAT TO DO TO CORRECT

REPLACE EXPANSION VALVE OR                               *        REPLACE LIQUID LINE  &  ACCUMULATOR   

REPLACE ORIFICE TUBE AND ACCUMULATOR       *      ADD OIL, EVACUATE AND RECHARGE

  REMEMBER ORIFICE TUBE CONDITION                  *     (TIP) LIQUID LINE SWEATING, FROSTED

WILL TELL YOU IF BLACK DEATH IS OCCURRING     _______________________________________________

ADD OIL AS NEEDED EVACUATE AND RECHARGE

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                                                                            LOW SIDE  HIGH  HIGH SIDE LOW

LOW SIDE HIGH

HIGH SIDE LOW

CAUSE OF READING

COMPRESSOR NOT WORKING PROPERLY

WHAT TO DO

REPLACE COMPRESSOR  & ACCUMULATOR

ADD OIL, EVACUATE AND RECHARGE

(Tip)  Center Vent temp cool, Not cold

(Tip-2)  On Variable Displacement Comp. Check

Pressure Valve___________________________________________________________________________________

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