SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 288
3.18
“
E4
”
Outdoor Unit: Actuation of Low Pressure Sensor
Remote
Controller
Display
E4
Applicable
Models
REYQ8P~48P
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 compressor operation.
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 (A1P)
Stop valve is not opened.
Clogged filter
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