NANO

846 HVAC 11 12 13 14 • Are piping installation points onA/C compressor free of gas leakage? • Are piping installation on cooling unit free of gas leakage? • Perform gas leak inspection using gas leak tester. Are above items okay? INSPECT EVAPORATOR PIPING CONNECTIONS IN COOLING UNIT FOR GAS LEAKAGE Are piping connections for evaporator in cooling unit free of gas leakage? INSPECT EVAPORATOR PIPING CONNECTIONS IN COOLING UNIT FOR LOOSENESS INSPECT PIPING CONNECTIONS FOR LOOSENESS Are piping connections loose? VERIFYWHETHERMALFUNCTION IS IN EXPANSION VALVE, AIR MIXAND COMPRESSOR OIL OR ELSEWHERE Does refrigerant’s high-pressure value hardly increase? If the vane makes a noise, add 10 ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. If piping is damaged or cracked, replace it. If there is no damage, go to next step. Tighten connections to specified torque. If the vane makes a noise, add 10 ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. If the vane makes a noise, add 10 ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Replace O-r ing on piping, adjust refrigerant to specified amounts. Tighten connections to specified torque. If the vane makes a noise, add 10 ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. If the vane makes a noise, add 10 ml of compressor oil to the A/C compressor. Verify that the noise is no longer heard. Adjust refrigerant to specified amounts. Go to next step. ( Pressure hardly increases.) Go to step 17. Yes No Yes No Yes No Yes No STEP INSPECTION ACTION