Section 9 - Fault Finding
102 Installation and Maintenance
FAULT FINDING
9.1.20 High Pressure Sensor Error
9.1.21 Outdoor Unit, Flow Thermistor (Tw_Out) Error
Make sure that the wiring assembly is correctly
connected to the Outdoor PCB. The wiring assembly
must be undamaged, and the connectors must be dry.
Refer to Figure 67 on page 116.
Is the Outdoor Unit, Flow thermistor (Tw_Out)
connected to the Outdoor PCB?
Refer to Figure 67 on page 116.
Disconnect the High Pressure Sensor. Check that the
voltage is between 0.5 V DC and 4.5 V DC.
Disconnect the Outdoor Unit, Flow thermistor (Tw_Out).
Replace the Outdoor PCB.
Replace the Outdoor PCB.
Make sure that the wiring assembly is
correctly connected to the Low Pressure
Sensor. The wiring assembly must be
undamaged, and the connectors must be
dry.
Make sure that the wiring assembly for the
thermistor is connected correctly to the
Outdoor PCB.
Replace High Pressure Sensor.
Replace the Flow Thermistor.
NO
NO
NO
NO
YES
YES
YES
YES
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