York MCC-MCH 09 Installation Manual

Contents

York MCC-MCH 09 Installation Manual Manual pdf 19 page image

FLOOR/CEILING 19TROUBLE SHOOTING GUIDERemedy1. Wait for Power resume.2. Replace the fuse or reset thebreaker.3. Find the cause and fix it.4. Replace the faulty component.5. Retighten the connection.6. Check Thermostat setting.7. Find the cause then replaceCapacitor.8. Check and retighten.9. Find the cause before reset.1. Check the wiring and thecompressor winding resistance.2. Find the cause then replaceCapacitor.1. Remove charge, repair, evacuateand recharge.2. Insulate them separately.3. Wait while unit has enough time tocool the room.1. Check Thermostat setting.2. Check condenser air circulation.3. Find leak, repair and recharge.4. Remove charge, evacuate andrecharge.1. Remove charge, evacuate andrecharge.2. Determine the cause and replacecompressor.3. Remove charge, evacuate andrecharge.4. Replace it.In heating or cooling operation anyplastic parts may expand or shrink dueto a sudden temperatue change in thisevent, a clicking sound may occur.ProblemA.The air conditioner does notrun.B.The outdoor fan runs but thecompressor will not start.C.There is insufficient heating orcooling.D.The compressor runcontinuously.E. The compressor starts butshuts down quickly.F. Clicking sound is heard fromthe air conditioner.(continued)Probable cause1. Power Failure.2. Fuse blown or circuit breakeropen.3. Voltage is too low.4. Faulty contactor or relay.5. Electrical connections loose.6. Thermostat adjustment too low(in heating mode) or too high (incooling mode).7. Faulty Capacitor.8. Incorrect wiring, terminal loose.9. Pressure switch tripped.1. Motor winding cut or grounded.2. Faulty Capacitor.1. There is a gas leak.2. Liquid and gas line insulatedtogether.3. The room was probably very hot(cool) when you started thesystem.1. Thermostat adjustment too low(in heating mode) or too high (incooling mode).2. Faulty fan.3. Refrigerant charge too low, leak.4. Air or incondensables inrefrigerant circuit.1. Too much or too little refrigerant.2. Faulty compressor.3. Air or incondensables inrefrigerant circuit.4. Changeover valve damaged orblocked open (heat pump unit)In heating or cooling operation anyplastic parts may expand or shrinkdue to a sudden temperatue changein this event, a clicking sound mayoccur.