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
174 Troubleshooting
1. Troubleshooting with LED
1.1 Outdoor Unit
1.1.1 Main PCB (A1P)
The main PCB (A1P) has green LEDs (HAP, HBP). When the microprocessors work in order, the
LEDs blink.
1.1.2 Service PCB (A2P)
The error code can be identified with the orange LEDs (H1P~H7P) on the service PCB (A2P) in
monitor mode.
A1P
C4
HAP
A2P
A4P
A3P
(R22090)
HBP
H1P H3P H5P H7P
H2P H4P H6P
(R13069)
BS1
(MODE)
BS2
(SET)
BS4
(TEST)
BS5
(RESET)
BS3
(RETURN)