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                                                   AIR CONDITIONING           -   AIR CONDITIONING SYSTEM

                                                                  ON-VEHICLE INSPECTION
                             Sight Glass                          1.  INSPECT REFRIGERANT VOLUME
                                                                  Observe the sight glass on the liquid tube.
                                                                      Test conditions:
                                                                             S     Running engine at 1,500 rpm
                                                                             S     Blower speed control switch: "HI" position
                                                                             S     A/C switch ON
                                                                             S     Temperature control selector: "COOL" posi-
                                                                             S     Fully open the doors
 Item                     Symptom                                       Amount of refrigerant                          Remedy
                                                                                                      (1) Check for gas leakage with gas leak de-
  1     Bubbles present in sight glass                      Insufficient*                             tector and repair if necessary
                                                                                                      (2) Add refrigerant until bubbles disappear
  2     No bubbles present in sight glass                   None, sufficient or too much              Refer item 3 and 4
                                                                                                      (1) Check for gas leakage with gas leak de-
        No temperature difference between com-
  3                                                         Empty or nearly empty                     tector and repair if necessary
        pressor inlet and outlet
                                                                                                      (2) Add refrigerant until bubbles disappear
        Temperature between compressor inlet and
  4                                                         Correct or too much                       Refer to items 5 and 6
        outlet is noticeably different

                                                                                                      (1) Discharge refrigerant
        Immediately after air conditioning is turned
  5                                                         Too much                                  (2) Evacuate air and charge proper amount
        off, refrigerant in sight glass stays clear
                                                                                                      or purified refrigerant
        When air conditioning is turned off, refriger-
  6                                                         Correct                                                        -
        ant foams and then stays clear

*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.

 2002 ECHO (RM884U)

                                                                                           Author :              Date :                     1450
                                               AIR CONDITIONING            -     AIR CONDITIONING SYSTEM

                                                            2.     INSPECT REFRIGERANT PRESSURE WITH MAN-
                                                                   IFOLD GAUGE SET
                                                            This is a method in witch the trouble is located by using a man-
                                                            ifold gauge set. Read the manifold gauge pressure when the
                                                            these conditions are established.
                                                                   Test conditions:
                                                                          S    Temperature at the air inlet with the switch set
                                                                               at RECIRC is 30 - 35 

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