Troubleshooting
SiUS042113E
126
Part 6 Service Diagnosis
4.24 Thermistor or Related Abnormality (Outdoor Unit)
Error Code
H9
,
J3
,
J6
,
J8
,
P4
Method of Error
Detection
This fault is identified based on the thermistor input voltage to the microcomputer.
A thermistor fault is identified based on the temperature sensed by each thermistor.
Error Decision
Conditions
The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less
with the power on.
J3
error is judged if the discharge pipe temperature is lower than the heat exchanger
temperature.
Supposed
Causes
Disconnection of the connector for the thermistor
Defective thermistor(s)
Defective heat exchanger thermistor in the case of
J3
error (outdoor heat exchanger thermistor
in cooling operation, or indoor heat exchanger thermistor in heating operation)
Defective outdoor unit PCB
Troubleshooting
In case of
P4
Replace the outdoor unit PCB (main PCB).
P4
: Radiation fin thermistor
Caution
Be s
u
re to t
u
rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for FTXM-V Series
Page 16: ...SiUS042113E 12 Part 2 Specifications 1 Specifications 13 Part 2 Specifications...
Page 96: ...Troubleshooting SiUS042113E 92 Part 6 Service Diagnosis Reference Check No 01 Refer to P 134...
Page 150: ...Check SiUS042113E 146 Part 6 Service Diagnosis 18 24 class R24539 DC DC W V U...
Page 166: ...Piping Diagrams SiUS042113E 162 Part 8 Appendix RXM24VVJU 3D132217...
Page 171: ...SiUS042113E Operation Limit Part 8 Appendix 167 3 Operation Limit RXM09 12 18 24VVJU 3D133582A...
