E4 Low Pressure System Abnormality - Daikin R71FUV1 Service Manual

Si20-701_B
E4
3.28
Abnormality
Remote Controller Display
E4
Applicable Models
RY-F, R(Y)-G/GA/KU/LU, RR-M
Method of Error Detection
Continuity of the low pressure switch is detected by the
safety device circuitry.
Error Decision Conditions
Case where low pressure switch is actuated when the
compressor is operating
Supposed Causes
<Causes related to PCB>
Defective low pressure switch
Low pressure switch's harness is broken or
disconnected
Defective low pressure switch's connector connection
Defective outdoor unit PCB
<Causes related to product as a whole>
Defective refrigerant piping circuit
Stop valve is not opened (For R(Y)-LU)
162
Low Pressure System
Troubleshooting by Remote Controller