Mitsubishi Electric R410A Technical Manual page 52

Troubleshooting
Symptoms
Check whether the mode marked on the
screen is "AUTO".
The fan speed
cannot be
changed Check whether the mode marked on the
screen is "DEWET".
The "ON/OFF"
button of remote Check whether the batteries of remote
controller do not controller are exhausted.
work
The "ON/OFF" Check whether the time set on the timer has
lamp extinguishes expired.
The "TIMER ON" Check whether the time set on the timer has
lamp extinguishes expired.
No receiving
sounds from the Check whether the signal transmitter of the
indoor unit even remote controller is properly directed to the
when the infrared signal receiver of the indoor unit
"ON/OFF" button when the "ON/OFF" button is pressed.
is pressed
The buttons of the
remote controller Check whether the settings are locked.
do not work
52
Causes
R410A Tropical Split Type Technical Manual
Handling methods
When the "AUTO" mode is selected, the
unit will change the fan speed
automatically.
When the "DEWET" mode is selected,
the unit will change the fan speed
automatically. The fan speed can be
selected in "COOLING","HEATING"
and "SUPPLY AIR" mode.
Replace the batteries.
Restart the unit.
It comes to the setting time and the unit
stat running automatically.
Directly transmit the signal transmitter of
the remote controller to the infrared
signal receiver of the indoor unit, and
then push the "ON/OFF" button twice.
Push the "LOCK" button again.
Duct Type