Symptoms That Are Not System Malfunctions; Symptom: The System Does Not Operate; Symptom: The Fan Speed Does Not Correspond To The Setting; Symptom: The Fan Direction Does Not Correspond To The Setting - Daikin FXFQ20BVEB Installer And User Reference Manual

18 | Troubleshooting

18.1 Symptoms that are NOT system malfunctions

18.1.1 Symptom: The system does not operate

18.1.2 Symptom: The fan speed does not correspond to the setting

18.1.3 Symptom: The fan direction does not correspond to the setting

18.1.4 Symptom: White mist comes out of a unit (Indoor unit)

18.1.5 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)

Installer and user reference guide
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If after checking all above items, it is impossible to fix the problem yourself, contact
your installer and state the symptoms, the complete model name of the unit (with
manufacturing number if possible) and the installation date (possibly listed on the
warranty card).
The following symptoms are NOT system malfunctions:
▪ The air conditioner does not start immediately after the ON/OFF button on the
user interface is pressed. If the operation lamp lights, the system is in normal
condition. To prevent overloading of the compressor motor, the air conditioner
starts 5 minutes after it is turned ON again in case it was turned OFF just before.
The same starting delay occurs after the operation mode selector button was
used.
▪ If "Under Centralized Control" is displayed on the user interface, pressing the
operation button causes the display to blink for a few seconds. The blinking
display indicates that the user interface cannot be used.
▪ The system does not start immediately after the power supply is turned on. Wait
one minute until the micro computer is prepared for operation.
The fan speed does not change even if the fan speed adjustment button in
pressed. During heating operation, when the room temperature reaches the set
temperature, the outdoor unit goes off and the indoor unit changes to whisper fan
speed. This is to prevent cold air blowing directly on occupants of the room. The
fan speed will not change if the button is pressed.
The fan direction does not correspond with the user interface display. The fan
direction does not swing. This is because the unit is being controlled by the micro
computer.
▪ When humidity is high during cooling operation. If the interior of an indoor unit is
extremely contaminated, the temperature distribution inside a room becomes
uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for
details on cleaning the unit. This operation requires a qualified service person.
▪ Immediately after the cooling operation stops and if the room temperature and
humidity are low. This is because warm refrigerant gas flows back into the indoor
unit and generates steam.
When the system is changed over to heating operation after defrost operation.
Moisture generated by defrost becomes steam and is exhausted.
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1B – 2021.07