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Troubleshooting by Remote Controller
SiBE341027
108
Service Diagnosis
2.5
Actuation of Low Pressure Sensor
Remote
Controller
Display
E4
Applicable
Models
RQYQ-PY1B
Method of Error
Detection
Abnormality is detected by the pressure value of the low pressure sensor with the outdoor unit
main PCB (A1P).
Error Decision
Conditions
Error is generated when the low pressure is dropped under compressor operation.
Operating pressure: 0.07MPa
Supposed
Causes
Abnormal drop of low pressure
Defective low pressure sensor
Defective outdoor unit PCB (A1P)
Stop valve is not opened.