York MLCA-MLHA-07-24 Installation & Owner's Manual

Contents

17ENGLISHENTROUBLE SHOOTING GUIDEProblem Probable cause RemedyA. The air conditioner does not run. 1. Power failure. 1. Wait for power resume.2. Fuse blown or circuit breaker 2. Replace the fuse or reset theopen. breaker.3. Voltage is too low. 3. Find the cause and fix it.4. Faulty contactor or relay. 4. Replace the faulty component.5. Electrical connections loose. 5. Retighten the connection.6. Thermostat adjustment too low 6. Check thermostat setting.(in heating mode) or too high(in cooling mode).7. Faulty capacitor. 7. Find the cause then replacecapacitor.8. Incorrect wiring, terminal loose. 8. Check and retighten.9. Pressure switch tripped. 9. Find the cause before reset.B. The outdoor fan runs but the 1. Motor winding cut or grounded. 1. Check the wiring and thecompressor will not start. compressor winding resistance.2. Faulty capacitor. 2. Find the cause then replacecapacitor.C. There is insufficient heating or 1. There is a gas leak. 1. Remove charge, repair, evacuatecooling. and recharge.2. Liquid and gas line insulated 2. Insulate them separately.together.3. The room was probably very hot 3. Wait while unit has enough time to(cool) when you started the cool the room.system.D. The compressor runs continuously. 1. Thermostat adjustment too low 1. Check thermostat setting.(in heating mode) or too high(in cooling mode).2. Faulty fan. 2. Check condenser air circulation.3. Refrigerant charge too low, leak. 3. Find leak, repair and recharge.4. Air or incondensables in 4. Remove charge, evacuate andrefrigerant circuit. recharge.E. The compressor starts but shuts 1. Too much or too little refrigerant. 1. Remove charge, evacuate anddown quickly. recharge.2. Faulty compressor. 2. Determine the cause and replacecompressor.3. Air or incondensables in 3. Remove charge, evacuate andrefrigerant circuit. recharge.4. Changeover valve damaged or 4. Replace it.blocked open (heat pump unit).F. Clicking sound is heard from In heating or cooling operation any In heating or cooling operation anythe air conditioner. plastic parts may expand or shrink plastic parts may expand or shrink duedue to a sudden temperature change to a sudden temperature change in thisin this event, a clicking sound may event, a clicking sound may occur.occur.J199.pmd 31/03/2005, 9:54 PM17