Troubleshooting by Remote Controller Si20-701_B
171
Remote Controller Display
E4
Applicable Models
RZQ-H, RZQ(S)-B
Method of Error Detection
The protection device circuit checks continuity in the low
pressure switch.
Error Decision Conditions
When the low pressure switch is activated during
compressor operating.
Operating pressure: 0.12 MPa continuous 5 minutes
Supposed Causes
∗ Compressor is not defective.
îš„ Stop valve is not opened
îš„ Defective connection of low pressure switch connector
îš„ Disconnection in low pressure switch harness
îš„ Defective low pressure switch
îš„ Defective refrigerant system
îš„ Refrigerant shortage
îš„ Defective outdoor unit PCB
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