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Troubleshooting
SiE12-411
192
Service Diagnosis
5.19 Thermistor or Related Abnormality (Outdoor Unit)
Remote
Controller
Display
P4, J3, J6, J8, J9, H9
Outdoor Unit LED
Display
A
5
1
4
2
4
3
1
4
1
Method of
Malfunction
Detection
This type of error is detected by checking the thermistor input voltage to the microcomputer.
[A thermistor error is detected by checking the temperature being detected by each thermistor.]
Malfunction
Decision
Conditions
When the thermistor input is above 4.96 V or below 0.04 V with the power on, the
J3
error is
judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor
temperature, or the system will be shut down if all the units are judged with the
J8
error.
Supposed
Causes
"
Connector in poor contact
"
Thermistor defective
"
Outdoor unit PCB defective
"
Indoor unit PCB defective
"
Condenser thermistor defective in the case of
J3
error (outdoor unit heat exchanger
thermistor in the cooling mode, or indoor unit heat exchanger thermistor in the heating
mode)
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...