Troubleshooting by Remote Controller Si20-701_B
231
3.43
H4
Low Pressure Sensor
System Abnormality
Remote Controller Display
H4
Applicable Models
RZQ-H
Method of Error Detection
îš„ Check the continuity of low pressure sensor
îš„ Low pressure sensor is not operated when the low
pressure is dropped under specific pressure
(0.12MPa).
Error Decision Conditions
When there is no continuity in the low pressure sensor
during compressor start operating.
Low pressure sensor is not operated when the low
pressure is dropped under specific pressure (0.12MPa)
during compressor operating.
Supposed Causes
îš„ Defective low pressure sensor
îš„ Disconnection in low pressure switch harness
îš„ Defective connection of low pressure sensor
connector
îš„ Defective outdoor unit PCB
îš„ Refrigerant shortage
îš„ Stop valve is not opened
îš„ Defective electronic expansion valve
îš„ Clogged check valve
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