Actuation Of Low Pressure Sensor - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

Troubleshooting by Remote Controller
2.5

Actuation of Low Pressure Sensor

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