Daikin VRV III REYQ12PY1B User Manual (English)

Questions and Answers:

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Leslie ThompsonAug 5, 2025
Why is my Daikin Heating System not cooling or heating air well?
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  Amy HooverAug 5, 2025
  There are several reasons why your Daikin Heating System might not be cooling or heating air effectively. Check for the following: * Blocked air inlet or outlet of either the indoor or outdoor unit. If blocked, remove the obstacle(s). * Clogged air filter(s). If clogged, clean the air filter(s). * Enclosed outdoor unit(s). If enclosed, remove the enclosure. * Improper temperature setting. If set improperly, adjust the temperature to the correct degree. * Airflow rate set to 'LOW'. If set to low, adjust it to a proper airflow rate. * Improper direction of air diffusion. If set improperly, adjust it to a proper direction. * Open window(s) or door(s). If open, shut them tightly. * Direct sunlight. If the unit receives direct sunlight, hang curtains or shades on the windows.
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Erica MorrisAug 9, 2025
How to fix a Daikin VRV III REYQ12PY1B that does not start?
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  Emily HallAug 9, 2025
  If your Daikin Heating System fails to start, consider the following potential causes and solutions: * **Blown fuse(s):** Turn off the power supply and replace the fuse(s). * **Tripped breaker(s):** If the breaker knob is in the OFF position, turn the power supply ON. However, if the circuit breaker knob is in the tripped position, do not turn the power supply ON. * **Power failure:** After the power is restored, restart the system.
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shaffermirandaAug 13, 2025
What to do if my Daikin VRV III REYQ12PY1B Heating System starts then stops immediately?
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  Sharon MartinezAug 14, 2025
  If your Daikin Heating System starts but stops immediately, the issue might be due to: * A blocked air inlet or outlet of the indoor or outdoor unit. Make sure to remove any obstacles. * Clogged air filters. Ensure you clean the air filters.
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Angel ParkAug 17, 2025
Why does my Daikin VRV III REYQ12PY1B make intermittent stops?
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  harristamaraAug 18, 2025
  If your Daikin Heating System stops intermittently, and the remote controller displays malfunction codes 'U4' and 'U5' before restarting after a few minutes, the cause might be electrical noises. Try to remove the sources of electrical noises. After these causes are removed, the system will automatically restart operation.
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Jonathan ContrerasAug 22, 2025
Why is a white mist coming out of my Daikin VRV III REYQ12PY1B Heating System?
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  Erica ArellanoAug 22, 2025
  A white mist coming from your Daikin Heating System can be due to a few reasons: * During cooling operation, the ambient humidity is high, especially if the indoor unit is in a place with oil or dust. Clean the inside of the indoor unit. * Immediately after cooling operation stops, the ambient temperature and humidity are low. This is normal operation. * After defrosting, the system switches to heating operation. This is also normal operation.
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Jose Mcdaniel Jr.Aug 27, 2025
How to enable COOL-HEAT selection on my Daikin Heating System?
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  Andrew HinesAug 27, 2025
  If the COOL-HEAT selection is disabled on your Daikin Heating System, it might be due to centralized control. If the remote controller displays 'UNDER CENTRALIZED CONTROL', use a remote controller with the option to select cooling operation. If a COOL-HEAT selection remote controller is provided, use it to select cool or heat.
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Natalie GregoryAug 31, 2025
Why does my Daikin VRV III REYQ12PY1B Heating System emit odors?
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  deborahgibsonAug 31, 2025
  If your Daikin Heating System emits odors during operation, the inside of the indoor unit should be cleaned.