SiBE34-802 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1813.33 “JC” Outdoor Unit: Malfunction of Low Pressure SensorRemoteControllerDisplayJCApplicableModelsRXYSQ4~6PAMethod ofMalfunctionDetectionMalfunction is detected from pressure detected by low pressure sensor.MalfunctionDecisionConditionsWhen the low pressure sensor is short circuit or open circuit.SupposedCauses Defect of low pressure sensor Connection of high pressure sensor with wrong connection. Defect of outdoor unit PC board.Troubleshooting∗1: Voltage measurement point∗2: Refer to “Pressure Sensor”, pressure/voltage characteristics table on P253.(V2808)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Therelationshipbetween the ∗1VL and low pressure isnormal (see ∗2) when voltageis measured between X18A pins(2) and (3) of outdoor unitPC board (A1P)(see ∗1).Replace the low pressure sensor.Connect low pressure sensorproperty and restart system.NONOReplace outdoor unit PC board(A1P).YESYESThe lowpressure sensor isconnected to X18A (blue)of outdoor unit PCboard (A1P).
