NEXON EV SERVICE MANUAL

FATC 29 TROUBLE SHOOTING STEP INSPECTION ACTION 1 Check working of AC compressor as per logic (correct speed) Yes Go to next step No Check software 2 Inspect refrigerant system performance Perform refrigerant system performance test (Refer AC system performance test) is operating normal? Yes Operation is normal. (Recheck malfunc- tion symptoms) No Go to next step 3 Verify whether malfunction is in blower unit intake and condenser or another. Are refrigerant’s high-pressure and low pressure values both high? Yes Go to next step No Go to step 6. 4 Inspect blower unit intake is blower unit intake clogged Yes Remove obstruction. (If air does not reach evaporator within cooling unit, heat ex- change does not occur, refrigerant pressure becomes high, and therefore, removal of obstruction is necessary.) No Go to next step 5 Inspect condenser is it okay? Yes Adjust refrigerant to specified amount. (Excessive amount of refrigerant.) No Replace condenser, or repair and clean condenser fins. 6 Verify whether malfunction is in expan- sion valve, receiver/drier and refrigerant lines or elsewhere Are refrigerant’s high-pressure and low- pressure values low? Yes Go to next step No Go to step 14 7 Verify whether malfunction is in expan- sion valve and receiver /drier or elsewhere immediately after A/C com- pressor operates, does refrigerant’s high-pressure value momentarily rise to correct value, then fall and stay below it? (Is there negative pressure on low- pressure side? Yes Go to next step No Go to step 10.