Activation Of Low Pressure Sensor - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code

4.21 Activation of Low Pressure Sensor

E4
Error Code
Applicable
All outdoor units
Models
Method of Error Abnormality is detected by the pressure value with the low pressure sensor.
Detection Use the outdoor main PCB to determine the low pressure sensor pressure test value.
Error Decision Error is generated when the low pressure drops below a specific pressure level.
Conditions Low pressure drops after compressor activation.
Operating pressure: 0.07 MPa (10.2 psi)
Supposed
Causes
169
Abnormal drop of low pressure
Defective low pressure sensor
Defective outdoor main PCB
Stop valve is not opened
SiUS331604E
Service Diagnosis