ESIE05-03 Additional Checks for TroubleshootingPart 3 – Troubleshooting 3–111334515.9 Checks5.9.1 Clogged PointsTemperature differences must occur before or after the clogged points!Check points Check factor Causes Remedies1 AroundexpansionmechanismTemperaturedifferenceP DustP Choked moistureP Reduced effective pipediameter due to adherentcontamination, etc.Replace the expan-sion valve.2 Accumulator Frosting P Choked moisture Blow a nitrogen gas,and then replace therefrigerant.3 Distributor TemperaturedifferenceP DustP Choked moistureP Reduced effective pipediameter due to adherentcontamination, etc.Replace the heatexchanger ordistributor.4 Field piping TemperaturedifferenceP Collapsed pipe Replace the pipe.5 Stop valve TemperaturedifferenceP The stop valve is not fullyopen.Open the stop valvefully.RACIndoor Unit Outdoor UnitCOMP12334 5
