Troubleshooting for Outdoor Unit SiBE18-821_C
386 Troubleshooting
7.3 Actuation of Low Pressure Sensor
Remote
Controller
Display
E4
Method of
Malfunction
Detection
Detection by the pressure value with the low pressure sensor
Malfunction
Decision
Conditions
When the low pressure is dropped under specific pressure
Operating pressure: 0.07 MPa
Supposed
Causes
Abnormal drop of low pressure (Lower than 0.07 MPa)
Defective low pressure sensor
Defective outdoor unit PCB
Stop valve is not opened.
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