OVERALL SEQUENCE
DETAILED FLOW
1.INTERVIEW FOR MALFUNCTION
Interview the symptom to the customer.
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GO TO 2
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2.SYMPTOM CHECK
Check the symptom from the customer's information. Check that any symptom occurs other than the interviewed symptom.
Insufficient cooling/heating
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GO TO 3
.
Refrigerant leakage
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GO TO 6
.
Noise
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GO TO 7
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3.CONTROL SYSTEM DIAGNOSIS
Perform the system diagnosis for the A/C control system. Refer to
Description & Inspection
.
Is A/C control system normal?
YES
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GO TO 4
.
NO
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GO TO 8
.
4.PERFORMANCE TEST
Perform the performance test. Check the operation of each part. Refer to
Inspection
.
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GO TO 5
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5.TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE
Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. Specify the malfunctioning part. Refer to
Symptom Table
.
Low refrigerant charge
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GO TO 6
.
Except above
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GO TO 8
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6.CHECK REFRIGERANT FOR LEAKAGES
Check refrigerant for leakages. Specify the malfunctioning part. Refer to
Inspection
.
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GO TO 8
.
7.TROUBLE DIAGNOSIS FOR NOISE
Perform trouble diagnosis for noise. Specify the malfunctioning part. Refer to
Description
.
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GO TO 8
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8.MALFUNCTION PART REPAIR
Repair or replace the malfunctioning part.
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GO TO 9
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9.REPAIR CHECK (OPERATION CHECK)
Check the operation of each part.
Does it operate normally?
YES
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INSPECTION END
NO
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GO TO 2
.