Troubleshooting by Remote Controller Si20-701_B
153
3.27
E3
Actuation of High Pressure
Switch
Remote Controller Display
E3
Applicable Models
CMSQ
Method of Error Detection
Abnormality is detected when the contact of the high
pressure protection switch opens.
Error Decision Conditions
Error is generated when the HPS activation count
reaches the number specific to the operation mode.
(Reference) Operating pressure of high pressure switch
Operating pressure: 4.0MPa
Reset pressure: 2.85MPa
Supposed Causes
Actuation of outdoor unit high pressure switch
Defective high pressure switch
Defective outdoor unit PCB
Instantaneous power failure
Defective high pressure sensor
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