Specifications
Table Of Contents
- Cover
- Table of Contents
- Part 1 General Information
- Part 2 Specifications
- Part 3 Refrigerant Circuit
- Part 4 Function
- Part 5 Test Operation
- Part 6 Troubleshooting
- Part 7 Appendix
- 1. Piping Diagrams
- 2. Wiring Diagrams for Reference
- 3. List of Electrical and Functional Parts
- 4. Option List
- 5. Piping Installation Point
- 6. Example of connection (R-410A Type)
- 7. Thermistor Resistance / Temperature Characteristics
- 8. Pressure Sensor
- 9. Method of Checking the Inverter’s Power Transistors and Diode Modules
- Part 8 Precautions for New Refrigerant (R-410A)
- Index
- Drawings & Flow Charts
Troubleshooting by Indication on the Remote Controller Si34-704
238 Troubleshooting
3.27
“
J5
”
Outdoor Unit: Malfunction of Thermistor (R2T), (R7T)
for Suction Pipe
Remote
Controller
Display
J5
Applicable
Models
RXQ5P~54P
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the suction pipe temperature
thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.
Supposed
Causes
Defect of thermistor (R2T), (R7T) for outdoor unit suction pipe
Defect of outdoor unit PC board (A1P)
Defect of thermistor connection
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P361.
(V3073)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after dis-
connecting the thermistor
(R2T), (R7T) from the
outdoor unit PC
board.
(1.8kΩ
to 800kΩ)
Replace outdoor unit PC board
(A1P).
Connect the connector and turn on
again.
NO
NO
Replace the thermistor R2T, R7T.
YES
YES
Connector
is connected to
X30A, of outdoor unit
PC board.
(A1P)
Confirm which discharge
thermistor is abnormal using
outdoor unit "monitor mode".
(Refer page 194 and 195)