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
Troubleshooting with LED SiUS181631EA
180 Troubleshooting
1.3 Indoor Unit
Operation Lamp The operation lamp blinks when any of the following errors is detected.
When a protection device of the indoor or outdoor unit is activated, or when the thermistor
malfunctions.
When a signal transmission error occurs between the indoor and outdoor units.
In either case, conduct the diagnostic procedure described in the following pages.
CTXG series
FVXS series
CTXS/FTXS series CDXS/FDXS series
Operation lamp
(multi-monitor lamp)
(R24043)
(R23939)
Operation lamp
(green)
(R23940)
Operation lamp
(green)
Operation lamp (green)
(R23941)