How to fix Daikin REYQ10T7Y1B Air Conditioner ambient temperature sensor malfunction?
- EEllen WallSep 23, 2025
If the ambient temperature sensor is malfunctioning on your Daikin Air Conditioner, check the connection on the PCB or actuator.

How to fix Daikin REYQ10T7Y1B Air Conditioner ambient temperature sensor malfunction?
If the ambient temperature sensor is malfunctioning on your Daikin Air Conditioner, check the connection on the PCB or actuator.
What to do if my Daikin REYQ10T7Y1B shows a low pressure malfunction?
If your Daikin Air Conditioner is showing a low pressure malfunction, first open the stop valves. Then, check the refrigerant level and recharge the unit if needed. Finally, inspect the user interface display and the transmission wiring between the outdoor and indoor units.
How to fix a Daikin Air Conditioner indoor unit communication error?
If you experience an indoor unit communication error with your Daikin Air Conditioner, check the user interface connection.
How to troubleshoot a Daikin REYQ10T7Y1B with an activated high pressure switch?
If the high pressure switch is activated on your Daikin Air Conditioner, check the stop valve situation and inspect for any abnormalities in the field piping or airflow over the air-cooled coil.
What to do if my Daikin REYQ10T7Y1B has a refrigerant overcharge or stop valve closed?
If your Daikin Air Conditioner indicates a refrigerant overcharge or a closed stop valve, check the refrigerant amount and recharge the unit if necessary. Also, ensure that the stop valves are open.
How to troubleshoot Daikin REYQ10T7Y1B electronic expansion valve (lower heat exchanger)?
If you are experiencing issues with the electronic expansion valve (lower heat exchanger) (Y3E) on your Daikin Air Conditioner, check the connection on the main PCB (X23A) or the actuator.
How to troubleshoot Daikin REYQ10T7Y1B Air Conditioner electronic expansion valve (receiver gas)?
If you are experiencing issues with the electronic expansion valve (receiver gas) (Y4E) on your Daikin Air Conditioner, check the connection on the main PCB (X25A) or the actuator.
How to troubleshoot Daikin REYQ10T7Y1B electronic expansion valve (subcool heat exchanger)?
If you are experiencing issues with the electronic expansion valve (subcool heat exchanger) (Y2E) on your Daikin Air Conditioner, check the connection on the main PCB (X22A) or the actuator.
What to do if stop valve closed during Daikin REYQ10T7Y1B Air Conditioner system test run?
If the stop valve is closed or wrong during the system test run of your Daikin Air Conditioner, open the stop valves.
How to open a closed liquid stop valve on a Daikin Air Conditioner?
If the liquid stop valve is closed on your Daikin Air Conditioner, open the liquid stop valve.
| Brand | Daikin |
|---|---|
| Model | REYQ10T7Y1B |
| Category | Air Conditioner |
| Language | English |
Details requirements for selecting and preparing the outdoor unit installation site.
Specifies the necessary clearances and conditions for installing the outdoor unit.
Additional site considerations for outdoor unit installation in cold weather conditions.
Instructions for preparing and selecting refrigerant piping for the system.
Specifies the strict requirements for clean and dry refrigerant piping materials.
Guidance on determining the correct piping sizes based on unit capacity and diagrams.
Details how to choose refnet joints and headers based on unit capacity.
Illustrates allowed piping layouts and connections for multiple outdoor units.
Covers safety requirements and wiring selection for the system's electrical connections.
Covers routing, connecting pipes, using kits, handling holes, protection, and valves.
Instructions on how to route refrigerant piping from front or side connections.
Details on connecting field piping to the outdoor unit using accessory pipes.
Instructions for correctly installing multi connection piping kits to avoid unit malfunction.
Procedure for handling knockout holes when connecting multiple outdoor units.
Instructions on how to properly open and close stop valves and use service ports.
Procedure for safely removing pinched refrigerant pipes, including warnings.
Steps to verify the integrity and condition of the installed refrigerant piping.
Steps to remove moisture and air from the refrigerant piping system.
Covers precautions, determination of amount, flow charts, and charging methods.
Essential safety warnings and important notices before and during refrigerant charging.
Provides formulas and tables to calculate the required additional refrigerant.
Visual guide to the refrigerant charging process and available options.
Details pre-charging and charging steps, with options for automatic or manual methods.
Procedure for the automatic refrigerant charging process, including conditions and limitations.
Procedure for manually charging the system with refrigerant and subsequent steps.
Lists and explains error codes that may occur during refrigerant charging.
Covers field wiring overview, knockout hole guidelines, and transmission wiring connections.
Explains the automatic leak detection feature and its prerequisites for activation.
Explains the automatic leak detection feature and its prerequisites for activation.
Step-by-step guide on how to conduct the system test operation and interpret results.
Procedures for rectifying issues identified during the test run and re-testing.
How to interpret and resolve issues identified by error codes displayed on the unit.
A list and explanation of various error codes encountered on the indoor unit user interface.











