TIGOR EV_ZIPTRON_SERVICE MANUAL

FATC 35 STEP INSPECTION ACTION 6 Verify whether malfunction is in expansion 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 expansion valve and receiver /drier or elsewhere immediately after A/C compressor operates, does refrig- erant’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. 8 Verify whether malfunction is in expansion valve or receiver/drier. Turn A/C switch off and air condi- tioner stop for 10 minutes. Turn both A/C switch and fan switch on. Does malfunction occur after com- pressor turn on? Yes Go to next step No Replace condenser and vacuum refrigerant line more than 30 minutes by vacuum pump, and re- frigerant to specified level. (Since water has intermixed in receiver/drier and it is saturated, replacement is necessary.) 9 Verify that expansion vale heat- sensing tube within cooling unit is positioned securely and correctly is expansion valve heat-sensing tube within cooling unit securely in- stalled in proper position? Yes Replace expansion valve. (Since valve closes too much replacement is necessary.) No Install heat-sensing tube securely in proper posi- tion. 10 Inspect refrigerant lines inspect refrigerant lines  Is piping free of damage and cracks?  Are piping connections free of oil grime? (visual inspection)  Are piping installation points on a/c compressor free of gas leakage?  Are piping installation on cooling unit free of gas leakage?  Perform gas leak inspection us- ing gas leak tester. Are above items okay? Yes Go to next step No If piping or an A/C component is damaged or cracked, replace it.