Display; Operations; Start/Stop Operation; Select Fahrenheit Or Celsius - Lennox MCA Series Service Manual

• Direct (Direction) button. Press to move louvers up
and down in six degree increments. Louvers remain in
place where stopped.
• LED button. Press the LED button to turn on the indoor
unit display (on units with display). Press the button
again to turn off the display.
• Follow (Follow Me) button. Press to activate the
wireless remote's air temperature sensor. This will
also transfer the temperature sensing function from
the indoor unit to the remote. The indoor unit's air
temperature sensor will be disabled. The indoor unit
will regulate the room temperature based on the
temperature sensor in the remote controller, rather than
the sensor in the indoor unit.
The remote controller will send the indoor unit a signal
every three minutes. If the indoor unit doesn't receive
the signal for seven minutes, or if the button is pressed
again, the Follow Me function will terminate.
The remote controller must remain pointed toward the
indoor unit and must be within 26 feet (8 meters) of
the unit. Do not remove the controller from the room
or obstruct the signal of the remote controller during
Follow Me operation.
6.4.

Display

See "Figure 11. Remote Controller Display" on page 11
for illustration of remote control.
• Remote controller On. Icon displays to indicate that
the remote controller is on.
• Transmitting display. Icon blinks once when a signal
is sent from the wireless remote controller.
• Operation mode. These icons show the current mode
of operation. Press the mode button to scroll through
the operation modes:
Cool → Dry → Fan.
• Setpoint or Room Temperature. Displays the setpoint
temperature during normal operation. Displays the
room temperature when in Follow me mode. Adjust the
setpoint with up and down arrow buttons. No display
when unit is in fan mode.
• Timer ON/OFF. These icons light up to indicate that
the indoor unit has a timed auto-start or auto-stop set-
up.
• Battery charge status. Icon displays charge status
of wireless remote controller batteries. Only appears
when battery is low.
• Sleep mode. Icon displays to indicate that sleep mode
operation is on.
• Follow me. This icon displays when the air
temperature sensor in the wireless remote controller is
the sensor being used by the indoor unit. When this
function is off, the indoor unit uses a built-in sensor.
When the function is set to on, this option may help in
maintaining a closer comfort level in most cases.
• Fan speed. Displays the current fan speed.
6.5.

Operations

6.5.1.

Start/Stop Operation

Press the LED power button.
• Controller ON: LED power button lit brightly.
• Controller OFF: LED power button not lit.
6.5.2.

Select Fahrenheit or Celsius

Press and hold the Up and Down buttons at the same time
for three seconds to toggle between Fahrenheit and Celsius.
To Set the Operation Mode
Press the Mode button to scroll through the mode selections.
• Cool – System operates in cooling mode.
• Dry – System removes humidity according to preset
conditions (fan speed and setpoint temperature).
Cannot adjust fan speed.
NOTE: Temperature will be 6-8 degrees colder if this
mode is used.
• Fan – This is for Fan only, no cooling.
To set (or change) the room temperature setting (set point)
Press the up and down arrow buttons to adjust the setpoint.
6.5.3.

Cool/Fan mode

1. Press the Mode button to select either Cool or Fan.
2. Adjust the temperature setpoint using up and down arrow
buttons (range 62°F – 86°F).
3. Press the Fan Speed button to select Auto, Low, Med,
or High fan speed.
NOTE: Temperature set point is not displayed in fan
mode.
6.5.4.

Dry Mode

1. Press the Power button. An LED light on the indoor unit
displays.
2. Press the Mode button to select Dry.
3. Adjust the temperature setpoint using up and down arrow
buttons.
NOTE: Temperature will be 6-8 degrees colder if this
mode is used.
NOTE: Fan speed is not adjustable in dry mode.
6.5.5.

Timer Operation

Timer ON and Timer OFF are used to turn on and turn off the
indoor unit at selected intervals.
6.5.6.

Timer ON Operation

1. Press the Timer ON button. The Timer ON icon, the last
auto-on time, and "h" will display.
2. Press the Timer ON button again to set the amount of
time before the indoor unit begins operation. Each press
will increase the time in half hour increments until 10
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