Si18-525B
Troubleshooting for RA Indoor Unit
Troubleshooting
335
4.4
Thermistor or Related Abnormality (Indoor Unit)
Remote
Controller
Display
C4
,
C9
Method of
Malfunction
Detection
The temperatures detected by the thermistors are used to determine thermistor errors.
Malfunction
Decision
Conditions
When the thermistor input is more than 4.96 V or less than 0.04 V during compressor
operation
∗
.
∗
(reference)
When above about 212°C (less than 120 ohms) or below about -50°C (more than 1,860 kohms).
Note:
The values vary slightly in some models.
Supposed
Causes
Faulty connector connection
Faulty thermistor
Faulty PCB
Troubleshooting
Check No.06
Refer to P.338
C4
: Heat exchanger temperature thermistor
C9
: Room temperature thermistor
Check the connector connection.
YES
Correct the connection.
Replace the thermistor.
(Replace the indoor unit PCB.)
Replace the indoor unit PCB.
Is it normal?
Is it normal?
(R4696)
NO
Check No. 06
Thermistor resistance check
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Содержание D-Series
Страница 1: ...Si18 525B Applied Models Super Multi Plus Cooling only Super Multi Plus Heat Pump D Series ...
Страница 33: ...List of Functions Si18 525B 20 List of Functions ...
Страница 34: ...Si18 525B Specifications 21 Part 2 Specifications 1 Specifications 22 1 1 Cooling Only 22 1 2 Heat Pump 42 ...
Страница 71: ...Specifications Si18 525B 58 Specifications ...
Страница 107: ...Printed Circuit Board Connector Wiring Diagram Si18 525B 94 Printed Circuit Board Connector Wiring Diagram ...
Страница 117: ...Refrigerant Flow for Each Operation Mode Si18 525B 104 Refrigerant Circuit ...
Страница 171: ...Indoor Unit SkyAir Models Si18 525B 158 Function ...
Страница 207: ...Test Operation and Field Setting for RA Indoor Unit Si18 525B 194 Test Operation ...
Страница 336: ...Si18 525B Service Check Function Troubleshooting 323 ...
Страница 443: ...BP Unit Si18 525B 430 Removal Procedure The clamps are to be kept in stock Step Procedure Points Clamps Q0529 ...
Страница 469: ...Wiring Diagrams Si18 525B 456 Appendix ...
Страница 475: ...Si18 525B vi Index ...