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 with LED
Troubleshooting 181
FFQ series with wired remote controller (BRC1E73)
FFQ series with wireless remote controller kit (BRC082A41W, BRC082A42W(S))
In case of wireless remote controller, a transmitter board (A2P) and a receiver (A3P) are installed
on indoor unit. When the error occurs, the operation lamp on the receiver (A3P) blinks.
Caution: When operation stops suddenly and the operation lamp blinks, it could be operation mode conflict.
For FFQ models, even if the operation mode conflict occurs, the operation lamp does not blink.
1) Check if the operation modes all the same for the indoor units connected to multi system
outdoor unit?
2) If not, set all the indoor units to the same operation mode and confirm that the operation lamp is
not blinking.
3) Moreover, when the operation mode is automatic, set all the indoor unit operation mode as
cooling or heating and check again if the operation lamp is normal.
If the lamp stops blinking after the above steps, there is no malfunction.
∗
Operation stops and operation lamp blinks only for the indoor unit that has a different operation
mode set later. (The first set operation mode has priority.)
Service Monitor The indoor unit has a green LED (LED A or HAP) on the control PCB. When the microcomputer
works in order, the LED blinks. (Refer to pages 26, 28, 30, 32, 34, 36 and 38 for the location of
LED.)
Operation lamp (green)
(R23942)
+The error or warning message also blinks on the basic screen.
+
(R24044)
Operation lamp
(red)