SiENBE12-713
Troubleshooting
Service Diagnosis
263
5.21 Thermistor or Related Abnormality (Outdoor Unit)
Remote Control
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 FTKS20D3VMW
Page 11: ...Introduction SiENBE12 713 x...
Page 47: ...Specifications SiENBE12 713 36 Specifications...
Page 113: ...Control Specification SiENBE12 713 102 Function and Control...
Page 235: ...Instruction SiENBE12 713 224 System Configuration...
Page 297: ...Check SiENBE12 713 286 Service Diagnosis...
Page 316: ...SiENBE12 713 Outdoor Unit Removal Procedure 305 Step Procedure Points...