ESIE12-06
4.13 High Pressure Abnormality (Detected by the High
Pressure Switch)
4.13.1 RZQG71, 100
E3
Remote
Controller
Display
Applicable
RZQG71, 100
Models
Method of Error
[In cooling]
Detection
The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T).
[In heating]
The error is detected by the indoor unit intermediate heat exchanger thermistor (R3T).
Error Decision
[In cooling]
Conditions
When the outdoor unit intermediate thermistor (R5T) detects the pressure shown below.
[In heating]
When the indoor unit intermediate thermistor (R3T) detects the pressure shown below.
Supposed
Dirt and blockage of the outdoor unit heat exchanger
Causes
Defective outdoor unit fan motor
Defective indoor unit fan motor
Defective electronic expansion valve
Overcharge of refrigerant
Defective indoor unit PCB
Defective outdoor inverter unit PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
[In cooling]
Are the
characteristics of the
outdoor unit intermediate
thermistor normal?
YES
The
outdoor unit heat
exchanger is clogged or
blocked.
NO
The
outdoor unit fan is
rotating during operation.
YES
A
Service Diagnosis
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)
NO
YES
NO
Troubleshooting by Remote Controller
Replace the outdoor unit
intermediate heat exchanger
thermistor.
Clean or remove the clocking
item.
Remove the foreign matter.
Replace the fan motor.
147