Flowchart Of Trouble Diagnosis

DIAGNOSIS AND REPAIR WORK FLOW

Flowchart of Trouble Diagnosis


DESCRIPTION OF TROUBLE DIAGNOSIS FLOWCHART







DETAILS OF TROUBLE DIAGNOSIS FLOWCHART


1. INTERIEW FOR MALFUNCTION

Interview the customer to obtain the malfunction information.
- GO TO 2.

2. SYMPTOM CHECK

Check the malfunction based on the information obtained from the customer. Check if any other malfunctions are present.
Insufficient coolingInsufficient heating-GO TO 3.
Coolant leakage-GO TO 6.
Noise- GO TO 7.

3. CONTROL SYSTEM DIAGNOSIS

Perform control system diagnosis. Refer to "Work Flow" Work Flow in "HAC HeaterAir Conditioner Control System."
No malfunction detected-GO TO 4.
Malfunctioning is detected-GO TO 8.

4. PERFORMANCE TEST

Perform the performance inspection. Refer to "Inspection" Performance Test.
- GO TO 5.

5. TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE

Perform diagnosis based on the gauge pressure diagnosis table, and identify the location of the malfunction.
Refer to "Symptom Table" Symptom Table.
Insufficient refrigerant-GO TO 6.
Other than the above-GO TO 8.

6. CHECK REFRIGERANT FOR LEAKAGE

Perform the refrigerant leakage check and identify the location of the leak. Refer to "Check Refrigerant Leakage" Check Refrigerant Leakage.
- GO TO 8.

7. TROUBLE DIAGNOSIS FOR NOISE

Perform diagnosis based on the noise diagnosis table, and identify the location of the malfunction. Refer to
"Symptom Table" Noise.
- GO TO 8.

8. MALFUNCTION PARTS REPAIR

Repair or replace malfunctioning part.
- GO TO 9.

9. REPAIR CHECK (OPERATION CHECK)

Check operation and verify that the system is operating normally.
Is check result normal?
YES- Trouble diagnosis is complete.
NO- GO TO 2.