Specifications

SiBE28-805 Troubleshooting by Indication on the Remote Controller
Troubleshooting 155
3.15
“
E4
”
Outdoor Unit: Actuation of Low Pressure Sensor
Remote
Controller
Display
E4
Applicable
Models
CMSQ200A7, 250A7
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 PC board

Stop valve is not opened.