Daikin FXUA100AVEB, Installer And User Manual

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11 | Troubleshooting
Installer and user reference guide
38
FXUA50~100AVEB
VRV system air conditioner
4P673843-1 – 2022.01
Malfunction Measure
The system operates but
cooling or heating is
insufficient. ▪ Check if air inlet or outlet of outdoor or indoor
unit is not blocked by obstacles. Remove any
obstacles and make sure the air can flow freely.
▪ Check if the air filter is not clogged (see "10.2.2 To
clean the air filter" [
4
32]).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Close doors and
windows to prevent wind from coming in.
▪ Check if there are too many occupants in the room
during cooling operation. Check if the heat source
of the room is excessive.
▪ Check if direct sunlight enters the room. Use
curtains or blinds.
▪ Check if the air flow angle is proper.
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).
11.1 Symptoms that are NOT system malfunctions
The following symptoms are NOT system malfunctions:
11.1.1 Symptom: The system does not operate
▪ 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.
▪ The system does not start immediately after the power supply is turned on. Wait
one minute until the micro computer is prepared for operation.
11.1.2 Symptom: The fan speed does not correspond to the setting
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.
11.1.3 Symptom: The fan direction does not correspond to the setting
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.