What does it mean when my Daikin Heating System shows error codes U4 or U5?
If your Daikin Heating System displays error codes U4 or U5, and restarts after a few minutes, it's likely due to communication interruption caused by electrical noises from other equipment. Try to identify and remove the sources of these electrical noises.
Why is COOL/HEAT selection disabled on my Daikin system?
If COOL/HEAT selection is disabled on your Daikin Heating System, the remote controller may be displaying 'CENTRAL CONTROL'. If so, use a remote controller with the option to select cooling operation. If you have a COOL/HEAT selection remote controller, use it to select cool or heat.
What does AA-03 error mean on my Daikin VRV EMERION REYQ-AATJA Heating System?
To address the AA-03 error (Gas furnace abnormality) on the remote controller of your Daikin Heating System, try executing combustion heating operation once or reset the power source.
Why is my Daikin Heating System not cooling or heating air well?
If your Daikin Heating System isn't cooling or heating well, several factors could be the cause. Check for blocked air inlets or outlets on both the indoor and outdoor units and remove any obstructions. Ensure the air filters are clean. If the outdoor unit is enclosed, remove the enclosure. Verify that the set temperature and airflow rate are appropriately adjusted. Also, make sure windows and doors are tightly shut, and if cooling, use curtains or shades to block direct sunlight. The model must be selected to match the air conditioning load. If you're using the drying operation, switch to cooling for temperature reduction.
How to fix a Daikin Heating System that does not start?
If your Daikin Heating System isn't starting, check the following: First, examine the fuses and replace any that have blown after turning off the power supply. Next, check the breakers; if any are in the OFF position, turn the power supply ON. If any breaker is tripped, leave the power supply OFF. Ensure there isn't a power failure; if there was, restart the system after the power is restored. Finally, turn off the power supply and verify that all connectors are securely plugged in.
What to do if Daikin VRV EMERION REYQ-AATJA starts then stops immediately?
If your Daikin Heating System starts and then stops immediately, it might be due to a blocked air inlet or outlet on either the indoor or outdoor unit; remove any obstacles. Another cause might be clogged air filters, so clean the air filters.
Why does my Daikin VRV EMERION REYQ-AATJA Heating System emit odors?
If odors are coming from your Daikin Heating System during operation, the inside of the indoor unit should be cleaned.
Why is my Daikin VRV EMERION REYQ-AATJA Heating System only doing fan operation?
If your Daikin Heating System is only operating the fan but not cooling or heating, the system may be in preparation mode. Wait for approximately 10 minutes.
Why doesn't my Daikin gas furnace start?
The gas furnace may not start if the compressor is operating, under stop-control, or immediately after defrost IN or defrost OUT. Wait until the operation becomes stable.
Why does my Daikin VRV EMERION REYQ-AATJA stop right after I turn it on?
If your Daikin Heating System stops immediately after turning it on, the system might be in preparation mode. Wait approximately one minute.
Read safety cautions before repair work. Observe all safety caution items described.
Explanation of icons used in the manual to attract reader attention to specific information.
List of revisions, including month/year, version, and revised contents.
Lists model names for outdoor units, branch selector units, indoor units, and air treatment equipment.
Provides visual representations of single and double outdoor units, branch selector units, and various indoor units.
Details combinations of outdoor units based on system capacity (Ton, HP) and module.
Defines connection ratios and maximum connection ratios for various indoor unit types.
Provides detailed specifications for REYQ-AATJA/AATJB and REYQ-AAYDA/AAYDB models.
Presents refrigerant circuit diagrams for outdoor units, branch selector units, indoor units, and outdoor-air processing units.
Details the functional parts layout for various REYQ models, including plane and front views.
Illustrates refrigerant flow during cooling, heating, defrost, and oil return operations.
Lists applicable models for wired and wireless remote controllers, specifying series and model names.
Details the names and functions of BRC1E73, BRC1H71W, and wireless remote controllers.
Explains the Main/Sub setting for indoor units when controlled by two remote controllers.
Provides instructions for performing address setting for the receiver and wireless remote controller.
Details how to set group numbers for centralized remote control using the operating remote controller.
Outlines the Service Settings and Maintenance Menus accessible via the remote controller.
Provides details on accessing the Administrator and Installer menus for specific settings.
Illustrates the overall operation flowchart of the system, including stop, standby, startup, basic, protection, special, and other controls.
Details stop conditions such as stop due to error, system in stop control, and sub unit stops.
Explains restart standby and crankcase heater control during standby periods.
Describes controls for equalizing pressure and managing startup in cooling and heating.
Covers normal control, compressor PI control, compressor step control, and electronic expansion valve PI control.
Details various protection controls including high pressure, low pressure, discharge pipe, and inverter protection.
Explains special controls like pump down, oil return, defrost, outdoor unit rotation, and mode switching.
Covers backup operation, demand operation, and heating operation prohibition.
Provides an overview of indoor unit control, including operation flowcharts and temperature settings.
Details field settings for indoor units, including remote controller settings, applicable settings, and gas furnace setup.
Covers DIP switch settings, accessing PCB buttons, operating switches, PC configurator connection, and monitoring functions.
Provides instructions for setting DIP switches for single and multi branch selector units.
Outlines checks before test operation, checkpoints, and gas furnace test operation procedures.
Troubleshooting guide based on observed symptoms like system not starting, immediate stops, or poor cooling/heating.
Explains how to check and interpret error codes displayed on the remote controller for diagnosis.
Provides detailed troubleshooting steps for various error codes related to indoor, outdoor, and branch selector units.
Outlines various checks for system components like high pressure, low pressure, power transistors, and wiring.
Provides detailed wiring diagrams for outdoor units, branch selector units, indoor units, and air treatment equipment.
Details the procedure for removing the electrical component box from the unit, including screw locations.
General| Series | VRV EMERION |
|---|---|
| Model | REYQ-AATJA |
| Refrigerant | R410A |
| Maximum Number of Indoor Units | 16 |
| Power Supply | 380-415V, 3-phase, 50Hz |
| Operating Temperature Range (Cooling) | -5°C to 46°C DB |
| Operating Temperature Range (Heating) | -20°C to 15.5°C |
| Sound Pressure Level (Outdoor Unit) | 58 dB(A) |
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