SiBE811001EB TroubleshootingCONVENI-PACK 1928.4.19 High Pressure Switch AbnormalityError Code E3ApplicableModelsLRYEQ16AY1Method of ErrorDetectionAbnormality is detected when the contact of the high pressure protection switch opens.Error DecisionConditionsError is generated when the high pressure switch activation count reaches the number specificto the operation mode.(Reference) Operating pressure of high pressure switchOperating pressure: 3.8MPaReset pressure: 2.85MPaSupposedCauses Actuation of outdoor unit high pressure switch Defective high pressure switch Defective outdoor unit main PCB (A1P), sub PCB (A2P) Instantaneous power failure Defective high pressure sensorTroubleshootingAre the 3 points aboveOK?(1) Mount a pressure gauge on the high pressure service port.(2) Reset the operation using the remote controller, and then restart theoperation.YES Replace the high pressureswitch.NORectify the defective points, ifany.NOReplace the high pressuresensor.NOCaution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.Check for the points shown below.(1) Is the stop valve open?(2) Is the high pressure switch connector properly connected to the outdoorunit main PCB?(3) Does the high pressure switch have continuity?Does the stop dueto error (E3) recur?Are thecharacteristics of thehigh pressure sensornormal? (See ∗1.)Is the high pressureswitch operating valuenormal (i.e., 3.8MPa)?YESYESNO YESA
