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Craig SmithSep 7, 2025
How to check unit combination on Daikin REYQ12T7Y1B multi system?
- RRobin WilsonSep 7, 2025
If you have a wrong unit combination in your Daikin Air Conditioner multi system, check if the unit types are compatible.
How to check unit combination on Daikin REYQ12T7Y1B multi system?
If you have a wrong unit combination in your Daikin Air Conditioner multi system, check if the unit types are compatible.
What to do if my Daikin REYQ12T7Y1B Air Conditioner 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 REYQ12T7Y1B 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 REYQ12T7Y1B 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.
What to do if Daikin REYQ12T7Y1B Air Conditioner test run aborted due to communication issues?
If the Daikin Air Conditioner test run is aborted due to communication issues, check the communication wires and then re-execute the test run.
How to troubleshoot Daikin REYQ12T7Y1B Air Conditioner electronic expansion valve (inverter cooling)?
If you are experiencing issues with the electronic expansion valve (inverter cooling) (Y5E) on your Daikin Air Conditioner, check the connection on the sub PCB (X8A) or the actuator.
What to do if no BS unit connected to my Daikin REYQ12T7Y1B?
If no BS unit is connected to your Daikin Air Conditioner, connect a BS unit.
What to do if stop valve closed during Daikin REYQ12T7Y1B 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 REYQ12T7Y1B Air Conditioner?
If the liquid stop valve is closed on your Daikin Air Conditioner, open the liquid stop valve.
General| Brand | Daikin |
|---|---|
| Model | REYQ12T7Y1B |
| Category | Air Conditioner |
| Language | English |
Details requirements for selecting and preparing the installation location.
Covers the necessary preparations for refrigerant piping installation.
Specifies requirements for refrigerant piping materials and cleanliness.
Guidance on selecting appropriate refrigerant pipe diameters based on capacity.
Covers the necessary preparations for electrical wiring.
Outlines required safety devices for electrical installation.
Guidelines and procedures for securely mounting the outdoor unit.
Detailed instructions for connecting the refrigerant piping system.
Procedures and guidelines for inspecting the refrigerant piping system.
Procedure for conducting leak tests on the refrigerant piping system.
Steps for removing moisture and air from the refrigerant piping.
Covers the process and precautions for charging refrigerant into the system.
Important safety and operational precautions before charging refrigerant.
Method for calculating the required additional refrigerant charge.
Detailed steps for charging refrigerant, including pre-charging.
Procedure for performing an automatic refrigerant charge.
Procedure for performing a manual refrigerant charge.
Covers the process of connecting field electrical wiring.
Process for manually configuring system settings via the unit's PCB.
Safety warnings and critical preparation steps before commissioning.
List of items to verify before starting the commissioning process.
Overview of the system test run procedure and its purpose.
Step-by-step guide for executing the system's automatic test run.
Procedure for resolving issues identified during the test run.
Procedure for diagnosing and resolving issues using error code tables.
Reference for identifying and understanding system error codes.
Reference table of error codes and their potential causes and solutions.
Description of normal operational symptoms that may appear unusual.
General instructions on how to operate the VRV IV system.
Details on different operating modes available for the system.
Instructions for activating and using the humidity control dry program.
Guidance on controlling and adjusting the unit's air flow direction.
Procedure for designating and configuring the master user interface.