TIAGO TIGOR CNG - SERVICE MANUAL

HVAC 22 STEP INSPECTION ACTION If there is no damage, go to next step. 12 Inspect evaporator piping connec- tions in cooling unit for looseness Yes Tighten connections to specified torque. If the vane makes a noise, add 10 ml of compres- sor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. No If the vane makes a noise, add 10 ml of compres- sor oil to the A/C compressor. Verify that the noise is no longer heard. Replace O-ring on piping, adjust refrigerant to specified amounts. 13 Inspect piping connections for looseness are piping connections loose? Yes Tighten connections to specified torque. If the vane makes a noise, add 10ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. No If the vane makes a noise, add 10ml of compres- sor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. 14 Verify whether malfunction is in expansion valve, air mix and com- pressor oil or elsewhere does refrigerant’s high-pressure value hardly increases? Yes Go to next step. (Pressure hardly increases.) No Go to step 17. 5 Verify whether a malfunction is in compressor oil amount and a/c compressor or elsewhere when engine is racing, does high- pressure value increase? Yes Return to step 3. No Go to next step 16 Verify whether malfunctions is in compressor oil amount or a/c com- pressor after compressor oil is replenished each 10 ml, does high- pressure value increase? Yes Troubleshooting completed. (Explain to customer that cause was insufficient compressor oil.) No Replace A/C compressor. (Cause is defective AC compressor)