Daikin ERQ - 3.23 “H9” Outdoor Unit: Malfunction of Thermistor (R1 T) for Outdoor Air

Troubleshooting by Indication on the Remote Controller ESIE09-05
182 Troubleshooting
3.16 “E3” Outdoor Unit: Actuation of High Pressure Switch
Remote
Controller
Display
E3
Applicable
Models
ERQ 125 ~ 200 A7V1
Method of
Malfunction
Detection
Abnormality is detected when the contact of the high pressure protection switch opens.
Malfunction
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: 3.0MPa
Supposed
Causes
 Actuation of outdoor unit high pressure switch
 Defect of High pressure switch
 Defect of outdoor unit PC board (A1P)
 Instantaneous power failure
 Faulty high pressure sensor
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