Troubleshooting by Indication on the Remote Controller SiBE31-801_C245 TroubleshootingTroubleshootingCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.While in monitor mode,check the outdoor unit andthe function unit concerned.Check for the points shown below.(1) Is the stop valve open?(2) Is the high pressure switch connector properlyconnected to the main PCB?(3) Does the high pressure switch have continuity?Are the threepoints aboveOK?NOYES(1) Mount a pressure gauge on the high-pressure service port.(2) Reset the operation using the remote controller, and then restart theoperation.Does the stop dueto malfunction (E3)recur?YES Is the high pressure switchoperating value normal(i.e., 4.0MPa)?NONO YESAre the characteristics ofthe high pressure sensornormal? (See *1.)NOYESCheck if the “highpressure” value and theactual measurement valueby pressure sensor are thesame.NOYESRectify the defective points, ifany.Replace the high pressure switch.Replace the high pressure sensor.Replace the main PCB (A1P).· The high pressure sensor is normal, and the pressure detected with the PCB is also normal.· The high pressure has really become high.Referring to information on P.342, remove the causes by whichthe high pressure has become high.*1: Make a comparison between the voltage of the pressure sensor and that read by thepressure gauge.(As to the voltage of the pressure sensor, make measurement of voltage at the connector,and then convert it to pressure according to information on P.410.)*2: Make measurement of voltage of the pressure sensor.+5V Connector for highpressure sensor (Red)(4)(3)(2)(1)RedBlackWhiteMicro-controllerA/D inputMake measurement of DCvoltage between these wires.HighpressuresensorService CheckerConnect the service checker to compare the “high pressure” value and the actualmeasurement value by pressure sensor (Refer to *1) by using the service checker.CHECK 5
