Si20-701_B Troubleshooting by Remote Controller
162
3.28
E4
Low Pressure System
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>
îš„ Defective low pressure switch
 Low pressure switch’s harness is broken or
disconnected
 Defective low pressure switch’s connector connection
îš„ Defective outdoor unit PCB
<Causes related to product as a whole>
îš„ Defective refrigerant piping circuit
îš„ Stop valve is not opened (For R(Y)-LU)
To Next Page
Loading...
Need help?
General
