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
Si34-704 Troubleshooting by Indication on the Remote Controller
Troubleshooting 205
3.6
“
A9
”
Electronic Expansion Valve Malfunction / Dust
Clogging
Remote
Controller
Display
A9
Applicable
Models
FXFQ25~125M
Method of
Malfunction
Detection
Check coil condition of electronic expansion valve by using microcomputer.
Check dust clogging condition of electronic expansion valve main body by using
microcomputer.
Malfunction
Decision
Conditions
Pin input for electronic expansion valve coil is abnormal when initializing microcomputer.
Either of the following conditions is seen/caused/ occurs while the unit stops operation.
z
Temperature of suction air (R1T) – temperature of liquid pipe of heat exchanger (R2T)>8°C.
z
Temperature of liquid pipe of heat exchanger (R2T) shows fixed degrees or below.
Supposed
Causes
Defective drive of electronic expansion valve
Defective PCB of indoor unit
Defective relay cables