Daikin REYQ8-48PY1B - E3 Outdoor Unit: Actuation of High Pressure Switch

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 286
3.17
“
E3
”
Outdoor Unit: Actuation of High Pressure Switch
Remote
Controller
Display
E3
Applicable
Models
REYQ8P~48P
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 high pressure switch 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

Defect of high pressure switch

Defect of outdoor unit main PCB (A1P)

Instantaneous power failure

Faulty high pressure sensor