High Pressure Abnormality (Detected By The High Pressure Switch) - Daikin RZQG71L9V1 Service Manual

Troubleshooting by Remote Controller
4.14 High Pressure Abnormality (Detected by the High
Pressure Switch)
E3
Remote
Controller
Display
RZQG71~140
Applicable
Models
Method of Error
[In cooling]
 Detect the continuity of high pressure switch (S1PH) with the protection device circuit.
Detection
 The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T).
[In heating]
 Detect the continuity of high pressure switch (S1PH) with the protection device circuit.
 The error is detected by the indoor unit intermediate heat exchanger thermistor (R3T).
 When the high pressure switch is activated (4.0 MPa)
Error Decision
 When the outdoor unit intermediate thermistor (R5T) detects the pressure shown below.
Conditions
 When the indoor unit intermediate thermistor (R3T) detects the pressure shown below.
 Stop valve is not opened
Supposed
 Harness breaking or poor connector connection of the high pressure switch
Causes
 Defective high pressure switch
 Indoor unit suction filter is blocked (In heating)
 Defective high pressure switch
 Defective indoor unit fan (In heating)
 Outdoor heat exchanger is dirt (In cooling)
 Defective outdoor unit fan (In cooling)
 Overcharge of refrigerant
 Defective outdoor unit PCB (A1P)
140
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
ESIE15-13C
Service Diagnosis