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HA-18 < PERIODIC MAINTENANCE > REFRIGERANT 4. Press UV lamp switch (5) and check A/C system for refrigerant leaks. (Where refrigerant leaks occur, flu- orescent leak detection dye appears green in color.) WARNING: Do not look directly into UV lamp light source. NOTE: • For continuous operating time of UV lamp, follow the manufacturer’s operating instructions. • Illuminate pipe joints from different angles using UV lamp to check for leaks. • Use a mirror in areas that are difficult to see to check for leaks. • Refrigerant leaks from the evaporator can be detected by soaking a cotton swab or similar material with drain hose water and illuminating it using the UV lamp. • Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may fluoresce. Be careful not to misidentify leaks. 5. Repair or replace parts where refrigerant leaks occur and wipe off fluorescent leak detection dye. NOTE: Completely wipe off fluorescent leak detection dye from gaps between parts, screw threads, and other components using a cotton swab or similar material. 6. Use a UV lamp to check that no fluorescent leak detection dye remains after finishing work. WARNING: Do not look directly into UV lamp light source. NOTE: • For continuous operating time of UV lamp, follow the manufacturer’s operating instructions. • Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may fluoresce. Be careful not to misidentify leaks. CHECK REFRIGERANT LEAKS USING ELECTRONIC LEAK DETECTOR WARNING: Do not check for refrigerant leaks while the engine is running. CAUTION: Be careful of the following items so that inaccurate checks or misidentifications are avoided. • Do not allow refrigerant vapor, shop chemical vapors, cigarette smoke or other contaminates around the vehicle. • Always check refrigerant leaks in a low air flow environment so that refrigerant may not disperse. 2 , 50 psi) or more when temperature is 16 °C (61 °F) or more. When pressure is lower than the specified value, recycle refrigerant completely and recharge refrigerant to the specified level. NOTE: 2 , 50 psi) or less when tem- perature is less than 16 °C (61°F). 4. Clean the area where the refrigerant leak check is performed and check for refrigerant leaks along all sur- faces of pipe connections and A/C system components using electronic leak detector probe. CAUTION: • Continue checking once leaks are found. Always continue and complete checking along all pipe connections and A/C system components for additional leaks. • When leaks are detected, clean leak area using compressed air and re-check. • When checking the evaporator for leaks, always clean inside of drain hose so that the probe sur- face may not be exposed to water or dirt. NOTE: • Always check for leaks starting from the high-pressure side and continue to the low-pressure side. • When checking the evaporator for leaks, operate blower motor for 15 minutes or more at the maximum speed while the engine is stopped. Insert electronic leak detector probe into drain hose and hold for 10 minutes or more. • When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining refrigerant so that misidentification can be avoided. 5. Repair or replace parts where refrigerant leaks occur. • A/C switch: ON |