Troubleshooting for Outdoor Unit SiEN18-622
362 Troubleshooting
7.3 Actuation of Low Pressure Sensor
Remote Control
Display
E4
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Abnormality is detected by the pressure value with the low pressure sensor.
Malfunction
Decision
Conditions
Error is generated when the low pressure is dropped under specific pressure.
Operating pressure:0.07MPa
Supposed
Causes
Abnormal drop of low pressure (Lower than 0.07MPa)
Defect of low pressure sensor
Defect of outdoor unit PCB
Stop valve is not opened.
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