8
4. OPERATION RANGE
Use the system in the following temperature and
humidity ranges for safe and effective operation.
*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 con-
ditioner may not operate.
5. 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 it off during the air conditioning
season for starting operation smoothly.
• If the main power supply is turned off during oper-
ation, operation will restart automatically after the
power turns back on again.
5-1 COOLING, HEATING, AUTOMATIC AND
FAN ONLY OPERATION
(Refer to figure 4 and 7)
• The operation mode cannot be changed with the
remote controller whose display shows
“
” (changeover under control).
• When the display “
” (changeover under
control) flashes, refer to the chapter “Operation
procedure - Setting the master remote controller”.
• Automatic operation can be selected only by
REYQ series.
• The fan may keep on running for about 1 minute
after the heating operation stops for removing the
heat in the indoor units.
• The air flow rate may adjust automatically
depending on the room temperature or the fan
may stop immediately. This is not a malfunction.
• To protect the unit, the system may control the air
flow rate automatically.
• It may take some time to change the air flow rate.
This is not a malfunction.
FOR SYSTEMS WITHOUT COOL/HEAT
SELECTOR (Refer to figure 4)
Press the operation mode selector button sev-
eral times and select the operation mode of
your choice;
“
” Cooling operation
“
” Heating operation
“
” Automatic operation
“
” Fan only operation
NOTE
• Automatic operation (REYQ only)
In this operation mode, cool/heat changeover is
automatically conducted.
Press the on/off button.
The operation lamp lights up and the system
starts operation.
FOR SYSTEMS WITH COOL/HEAT SELECTOR
(Refer to figure 7)
Select operation mode with the COOL/HEAT
selector as follows:
“
” “
” Cooling operation
(Refer to figure 7.1)
“
” “
” Heating operation
(Refer to figure 7.2)
“
”
“
”
Fan only operation
(Refer to figure 7.3)
Press the on/off button.
The operation lamp lights up and the system
starts operation.
Adjustment
To adjust the desired temperature, fan speed
and air flow direction follow the procedure
shown below.
Press the temperature setting button and pro-
gram the desired temperature.
Each time this button is pressed, the tem-
perature setting rises or lowers 1°F.
NOTE
• Set the temperature within the operation
range.
• The temperature setting is impossible for fan
only operation.
Press the fan speed control button and select
the fan speed of your preference.
Press air flow direction adjust button.
Refer to the chapter “Adjusting the air flow
direction” for details.
COOLING
HEATING
outdoor temperature
23°~110°FDB
5°~60°FWB
indoor temperature
57°~77°FWB
59°~80°FDB
indoor humidity
≤
80%*
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2
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2
3
4
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