Why is my Daikin Heating System running the fan but not cooling or heating?
If your Daikin Heating System is only conducting fan operation and not cooling or heating, it may be in preparation mode. Please wait for approximately 10 minutes.
Why is my Daikin REYQ72-456XATJU Heating System not cooling or heating air well?
If your Daikin Heating System isn't cooling or heating air effectively, several factors could be at play. Start by checking for any obstructions blocking the air inlet or outlet of either the indoor or outdoor unit and remove them. Ensure the air filters are clean, and if the outdoor unit is enclosed, remove the enclosure. Verify that the set temperature and airflow rate are appropriately adjusted, and the direction of air diffusion is correct. Make sure all windows and doors are tightly shut, and if cooling, use curtains or shades to block direct sunlight. Finally, consider if the model is suitable for the number of people in the room. If you are in drying mode, switch to cooling operation.
How to fix a Daikin REYQ72-456XATJU Heating System that won't start?
If your Daikin Heating System isn't starting, begin by checking the fuses. If any fuses are blown, turn off the power supply and replace them. Next, inspect the breakers. If a breaker knob is in the OFF position, turn the power supply ON. However, if a circuit breaker knob is in the tripped position, do not turn the power supply ON. Also, check for any power failures and restart the system after the power is reset. Finally, ensure that all connectors are securely plugged in by turning off the power supply and verifying the connection.
What to do if my Daikin REYQ72-456XATJU Heating System starts then stops immediately?
If your Daikin Heating System starts and then immediately stops, the cause may be a blocked air inlet or outlet on either the indoor or outdoor unit. Make sure to remove any obstacles. It could also be due to clogged air filters, so ensure you clean the air filters.
Why does my Daikin Heating System show error codes U4 or U5 and then restart?
If your Daikin Heating System remote controller displays error codes U4 or U5, and the system stops but restarts after a few minutes, it's likely due to electrical noises from other equipment disrupting communication between the units. Try to identify and remove the sources of these electrical noises. Once the noises are eliminated, the system should automatically restart.
Why is COOL/HEAT selection disabled on my Daikin Heating System?
If you cannot select COOL/HEAT on your Daikin Heating System, it could be that your remote controller doesn't support cooling operation selection. In this case, use a remote controller that has the option to select cooling operation. Alternatively, COOL/HEAT selection may need to be made using a dedicated COOL/HEAT selection remote controller. Use that remote controller to select cool or heat.
Why is there white mist coming from my Daikin Heating System?
If a white mist is coming from your Daikin Heating System, especially during cooling operation, and the ambient humidity is high, it may be that the indoor unit is installed in a place with much oil or dust. Clean the inside of the indoor unit.
Why do odors come out from my Daikin REYQ72-456XATJU?
If odors are coming from your Daikin Heating System, it's likely that odors from the room, such as cigarettes, have been adsorbed inside the indoor unit and are now being blown out. The solution is to clean the inside of the indoor unit.
General| Model | REYQ72-456XATJU |
|---|---|
| Category | Heating System |
| Refrigerant | R-410A |
| Type | VRV |
| Power Supply | 380-415V/3Ph/50Hz |
Read safety cautions before conducting repair work. Understand warning and caution items.
Explanation of icons used in the manual to attract attention to specific information.
Details of revisions made to the manual, including month, year, version, and revised contents.
Lists the names of indoor and outdoor units, air treatment equipment, and branch selector units.
Illustrations showing the external appearance of indoor units, outdoor units, and air treatment equipment.
Details on how outdoor units can be combined, with tables for different models and unit counts.
Information on combination ratios, outdoor unit combinations, and limitations for heat recovery.
Detailed specifications for REYQ-XATJU(A), REYQ-XAYDU(A), and REYQ-XAYCU(A) models.
Lists models compatible with wired and wireless remote controllers.
Details the names and functions of the BRC1E73, BRC1H71W, and Wireless Remote Controller.
Explains the main/sub setting for indoor units controlled by multiple remote controllers.
Procedure for setting addresses for wireless remote controllers and receivers.
Instructions for setting group numbers for centralized control using the operating remote controller.
Guides for accessing service data and setting various service parameters.
Details on accessing administrator and installer menus for advanced settings.
Overview of the operating logic for outdoor units, including stop, standby, and startup controls.
Explains conditions for system stop due to errors, stop mode, or slave unit stops.
Details on restart standby and crankcase heater control during stopped modes.
Describes startup control in cooling and heating, including pressure equalization.
Covers normal control, compressor PI control, step control, fan control, and heat exchanger control.
Details high pressure, low pressure, discharge pipe, compressor body, and inverter protection controls.
Explains pump down, oil return, defrost, outdoor unit rotation, and mode switching controls.
Covers backup operation, demand operation, and heating operation prohibition.
Provides operation flowcharts for indoor units, including fan control and heater control.
Details on setting parameters for indoor units using remote controllers and PC configurator.
Instructions for setting parameters directly on the outdoor unit's PCB and using PC configurator.
Procedures for setting DIP switches on single and multi branch selector units.
Guidelines for performing checks and test operations before and during system commissioning.
Troubleshooting guide based on observed symptoms for indoor units, gas furnaces, and sensors.
Procedures for diagnosing errors and warnings displayed on the remote controller.
Detailed explanations of error codes and their corresponding troubleshooting steps.
Electrical wiring diagrams for outdoor units, indoor units, air treatment equipment, and branch selectors.
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