Troubleshooting by Remote Controller Si20-701_B
143
3.24
E3
High Pressure System
Abnormality
Remote Controller Display
E3
Applicable Models
RY-F, R(Y)-G/GA/KU
Method of Error Detection
Continuity of the high pressure switch is detected by the
safety device circuitry.
Error Decision Conditions
Case where high pressure switch is actuated when the
compressor is operating
Supposed Causes
<Causes related to PCB>
îš„ Defective high pressure switch
 High pressure switch’s harness is broken or
disconnected
 Defective high pressure switch’s connector connection
îš„ Defective outdoor unit PCB
<Causes related to product as a whole>
 Soiled outdoor unit’s best exchanger
îš„ Room cooling heat load is excessively high
îš„ Short circuit of discharged air
îš„ Contrary wing
îš„ Defective refrigerant piping circuit
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