Troubleshooting for Outdoor Unit
SiUS092230EA
162
Part 6 Service Diagnosis
Troubleshooting
(R26246)
Caution
YES
NO
OK
NG
NG
OK
NG
OK
Refrigerant shortage
Refrigerant overfill
Water mixed
Stop valve
Disconnect the connector S40
from the PCB.
Disconnect the 2 terminals of
the OL (Q1L).
Disconnect the 2 terminals of
the HPS (S1PH).
Resistance
Resistance
Resistance
Nearly 0
Nearly 0
Nearly 0
Insert the thermistor in
position.
Discharge pipe thermistor
Indoor heat exchanger thermistor
Outdoor heat exchanger thermistor
Discharge pipe thermistor
Indoor heat exchanger thermistor
Outdoor heat exchanger thermistor
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB (main PCB).
Replace the four way valve
or the coil.
Replace the outdoor unit
PCB (main PCB).
Thermistor
disconnected?
NG
OK
Replace the defective
thermistor(s).
Check No. 01
Check the thermistor
resistance value
Check No. 13
Check the four way valve.
Check No. 14
Check the refrigerant line.
Check No. 12
Check the electronic
expansion valve.
Replace the OL (Q1L).
Replace the harness.
YES
NO
Connect the connector S40
properly.
Is the connector S40
properly connected?
Check the
resistance between the 2
terminals on connector
S40.
Check the
resistance between the 2
terminals of the OL
(Q1L).
Replace the HPS (S1PH).
Check the
resistance between the 2
terminals of the of the
HPS (S1PH).
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for RX-W Series
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Page 239: ...SiUS092230EA Piping Diagrams Part 8 Appendix 233 RX24WMVJU9 3D141502 ...