Daikin RXSQ48TAVJU, Operation Manual

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Following Issues Do Not Mean System Malfunction

The system does not operate
• The air conditioner does not start immediately when restarting or changing the operation mode.
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.
•
If “
CENTRAL
CONTROL
” is displayed on the remote controller and pressing the operation button causes the display to blink for a few
seconds.
This indicates that the central device is controlling the unit.
The blinking display indicates that the remote control cannot be used.
• The system does not start immediately after the power supply is turned on.
Wait 10 minutes until the micro computer is prepared for operation.

Outdoor Unit stops sometimes
• The remote controller display reads “U4” or “U5” and the unit stops but then restarts after a few minutes.
This is because the remote control is intercepted by noise from electrical appliances other than the air conditioner, and this prevents
communication between the units, causing them to stop.
Operation automatically restarts when the noise goes away.

Cool/heat cannot be changed over
• When the display shows “
MASTER
CONTROLLED ”.
It shows that this is a slave remote controller.
Refer to “ Setting the Cool/Heat Change over Master ”.
•
When the Cool/Heat selector switch is installed and the display shows “
MASTER
CONTROLLED
”.
This is because COOL/HEAT change over is controlled by the Cool/Heat selector. Ask your local dealer where the Cool/Heat selector is installed.

Fan operation is possible, but cooling and heating do not work
• Immediately after the power is turned on.
The micro computer is getting ready to operate. Wait 10 minutes.

The fan speed does not correspond to the setting
• The fan speed does not change even if the fan speed control button is pressed.
During heating operation, when the room temperature reaches the set temperature, the outdoor unit goes off and the indoor unit changes to
low fan speed.
This is to prevent cold air blowing directly on occupants of the room.
The fan speed will not change even if the button is pressed, when another indoor unit is in heating operation.

The fan direction does not correspond to the setting
•
The fan direction does not correspond to the remote control display.
The louvers do not oscillate through the fan direction setting is in Swing.
This is because the unit is being controlled by the micro computer.
Please see the operation manual for the remote controller.
9 English