E3 High Pressure System Abnormality - Daikin R71FUV1 Service Manual

Troubleshooting by Remote Controller
E3
3.24
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>
Defective high pressure switch
High pressure switch's harness is broken or
disconnected
Defective high pressure switch's connector connection
Defective outdoor unit PCB
<Causes related to product as a whole>
Soiled outdoor unit's best exchanger
Room cooling heat load is excessively high
Short circuit of discharged air
Contrary wing
Defective refrigerant piping circuit
High Pressure System
Si20-701_B
143