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20.Fan speed control button
Press this button to select the fan speed of your
preference.
21.Operation mode selector button
• Press this button to select the operation
mode of your preference.
• Press this button to designate the master
remote controller.
Refer to the chapter "6-5 SETTING THE
MASTER REMOTE CONTROLLER".
22.Air flow direction adjust button
Refer to the chapter "Operation procedure -
Adjusting the air flow direction".
23.Fan only/air conditioning selector switch
Set the switch to "
"
" for heating or cooling operation.
24.Cool/heat changeover switch
Set the switch to "
"
" for heating operation.
25.Thermistor
It sense the room temperature around the
remote controller.
26.These button are used when the ventilation unit
are installed (These are optional accessories)
Refer to the operation manual of the ventilation unit.
NOTE
• Do not place the controller exposed to direct sun-
light. The LCD display may get discolored, failing to
display the data.
• Never pull or twist the electric wire of a remote con-
troller.
It may cause the unit to malfunction.
• Do not allow sharp or hard items to touch the buttons
of the remote controller.
The remote controller may be damaged or break-
down may occur.
• In contradistinction to actual operating situations, the
display on figure 2 shows all possible indications.
• Figure 2 shows the remote controller which is
opened the cover.
• For FXS, FXM, FXL and FXN, the air flow direc-
tion adjust button (22) is not available and the dis-
play (4) shows "NOT AVAILABLE" when pressed.
5. OPERATION RANGE
Use the system in the following temperature and
humidity ranges for safe and effective operation.
outdoor temperature
indoor temperature
indoor humidity
6
" for fan only operation or to
" for cooling operation or to
COOLING
HEATING
–5°~43°CDB
–20°~21°CDB
–20°~15.5°CWB
21°~32°CDB
15°~27°CDB
14°~25°CWB
≤ 80%
-
NOTE
• Cooling operation:
If the air conditioner is operated continuously while
the indoor temperature is 21°C or below and the
humidity is 80% or over, the interiors of the indoor
units may cause icing and water leakage may result.
• Heating operation:
The air conditioner may stop operating for the pro-
tection of the machine if the outdoor temperature is
21°C or over.
• To avoid condensation and water dripping out the
unit.
If the temperature or the humidity is beyond these
conditions, safety devices may work and the air
conditioner may not operate.
6. OPERATION PROCEDURE
• Operation procedure varies according to the com-
bination of outdoor unit and remote controller.
Read the chapter "What to do before operation".
• To protect the unit, turn on the main power switch
6 hours before operation.
And do not turn off the power supply during the air
conditioning season because of smoothly start
up.
• If the main power supply is turned off during oper-
ation, operation will restart automatically after the
power turns back on again.
6-1 COOLING, HEATING , AUTOMATIC AND
FAN ONLY OPERATION
• The operation mode cannot be changed with the
remote controller whose display shows
"
" (changeover under control).
Change the operation mode with the remote con-
troller whose display does not show "
• When the display "
control) flashes, refer to the chapter "Operation
procedure - Setting the master remote controller".
• The fan may keep on running for about 1 minute
after the heating operation stops for removing the
heat in the indoor unit.
• The air flow rate may be adjusted automatically
depending on the room temperature or the fan
may stop immediately. This is not a malfunction.
• For machine protection the system may control
the air flow rate automatically.
• It may take sometime for finishing to change the
air flow rate.
This is normal operation.
• Automatic operation (Heat Recovery series
(RQCEQ) only)
In this operation mode, cool/heat changeover is
automatically conducted.
".
" (changeover under
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