Service Manual
Table Of Contents
- Cover
- Table of contents
- Part 1 List of Functions
- Part 2 Specifications
- Part 3 Printed Circuit Board Connector Wiring Diagram
- Part 4 Refrigerant Circuit
- Part 5 Functions and Control
- Part 6 Test Operation and Field Settings
- Part 7 Remote Controller
- Part 8 Troubleshooting
- 1. Troubleshooting with LED
- 2. Service Diagnosis
- 3. Error Codes and Description
- 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
- 5. Troubleshooting for FFQ Series
- 6. Troubleshooting for Branch Provider (BP) Unit
- 7. Troubleshooting for Outdoor Unit
- 8. Thermistor Resistance/Temperature Characteristics
- 9. Pressure Sensor
- 10. Method of Replacing Inverter’s Power Transistors Modules
- Part 9 Appendix
SiUS181631EA Troubleshooting for Outdoor Unit
Troubleshooting 229
7.3 Actuation of Low Pressure Sensor
Error Code
E4
Method of Error
Detection
Detection by the pressure value with the low pressure sensor
Error Decision
Conditions
When the low pressure is dropped under specific pressure
Operating pressure: 0.07 MPa (23 ftAq)
Supposed
Causes
Abnormal drop of low pressure (Lower than 0.07 MPa (23 ftAq))
Defective low pressure sensor
Defective outdoor unit PCB
Stop valve not opened