NEXON EV SERVICE MANUAL

FATC 31 STEP INSPECTION ACTION 13 Inspect piping connections for loose- ness ? 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 compressor 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 expan- sion valve, air mix and compressor oil or elsewhere does refrigerant’s high- pressure value hardly increases? Yes Go to next step. (Pressure hardly increases.) No Go to step 17. 15 Verify whether a malfunction is in com- pressor 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 com- pressor oil amount or a/c compressor after compressor oil is replenished each 10 ml, does high pressure value in- crease? Yes Troubleshooting completed. (Explain to customer that cause was insufficient compressor oil.) No Replace A/C compressor. (Cause is de- fective AC compressor) 17 Verify whether malfunction is in expan- sion valve or elsewhere is only refrigerant low-pressure value high? Yes Go to step 20. No Go to next step 18 Verify that air mix is installed securely and properly are heater unit’s air mix links, air mix cranks and air mix rods securely and properly installed? Yes Go to next step No Repair or install links, cranks and rods securely in proper position 19 Verify that expansion valve heat sens- ing tube within cooling unit is positioned securely and correctly is expansion valve heat-sensing tube within cooling unit securely installed in proper posi- tion? Yes Replace expansion valve, then go to next step. (Since valve opens too much, re- placement is necessary. No Install heat-sensing tube securely in prop- er position, then go to next step. 20 Verify that malfunction symptom occurs after repair does cool air blow out? (Are results of refrigerant system perfor- mance test okay?) Yes Troubleshooting completed. Explain re- pairs to customer. No Recheck malfunction symptoms, then re- peat from step 1 if malfunction recurs.