Daikin REYQ120TAYDU User Manual

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Service

Manual

SiUS371614E

REYQ72-456TAYDU

REYQ72-456TATJU

Heat Recovery 60 Hz

Table of Contents

Questions and Answers:

A
Amber WillisAug 8, 2025
Why is my Daikin REYQ120TAYDU Heat Pump not cooling or heating air well?
- A
  Anita MathisAug 9, 2025
  If your Daikin Heat Pump isn't cooling or heating air effectively, check for these potential causes: * Obstructions blocking the air inlet or outlet of either the indoor or outdoor unit. Remove any obstacles. * Clogged air filters. Clean the air filters. * An enclosed outdoor unit. Remove the enclosure. * Improper temperature settings. Adjust the temperature to a suitable level. * Low airflow rate. Increase it to a proper setting. * Incorrect air diffusion direction. Adjust it to the correct direction. * Open windows or doors. Ensure they are tightly shut. * Direct sunlight exposure. Use curtains or shades on windows. * Too many people in the room. Ensure the model is appropriate for the air conditioning load.
D
donaldsuarezAug 14, 2025
Why does my Daikin REYQ120TAYDU Heat Pump make intermittent stops?
- T
  Tiffany MartinezAug 14, 2025
  If your Daikin Heat Pump system makes intermittent stops, it could be due to electrical noises from other equipment interfering with communication between the units. Try to eliminate the sources of electrical noise. Once these causes are removed, the system should automatically restart.
R
Robert JamesAug 20, 2025
How to fix a Daikin Heat Pump that does not start at all?
- T
  Timothy SmithAug 20, 2025
  If your Daikin Heat Pump system isn't starting, consider the following: * Blown fuse(s): Turn off the power supply and replace the fuse(s). * Tripped breaker(s): If a breaker knob is in the OFF position, turn the power supply ON. If a breaker knob is tripped, do not turn the power supply ON. * Power failure: After the power is restored, restart the system. * Loose or unplugged connector: Turn off the power supply to verify the connector's connection.
M
Mrs. Mary BergAug 27, 2025
What to do if Daikin REYQ120TAYDU Heat Pump does not cool air well?
- H
  hughessandraAug 27, 2025
  If your Daikin Heat Pump isn't cooling air effectively, it might be in dry operation. Change the system to cooling operation.
J
Jessica SmithSep 2, 2025
What to do if my Daikin REYQ120TAYDU starts operation but makes an immediate stop?
- M
  mhallSep 2, 2025
  If your Daikin Heat Pump starts and then immediately stops, it might be due to: * A blocked air inlet or outlet on either the indoor or outdoor unit. Remove any obstructions. * Clogged air filters. Clean the air filters.

Daikin REYQ120TAYDU Specifications

General

Series	VRV IV
Type	Heat Pump
Cooling Capacity (kW)	33.5
Heating Capacity (kW)	37.5
Refrigerant	R410A
Power Supply	380-415V / 50Hz / 3 Phase

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