-
89
-
'17 • PAC-T-256
(ii)
Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on
Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating".
1)
In case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor air tem-
perature"
⇒
Operation mode: Cooling
2)
In case of "Room temperature/Heating > Indoor return air temperature" and "Outdoor temperature /Heating > Outdoor air tem-
perature"
⇒
Operation mode: Heating
3) The outdoor air temperature of the above judgment conditions is sampled at every 10 minutes.
4) In the range where the above cooling and heating zones are overlapped
⇒
Forced thermostat OFF
Forced thermostat
OFF
Forced thermostat
OFF
Room temperature/Cooling
Room temperature/Heating
O
ut
do
or
a
ir
te
m
pe
ra
tu
re
(
℃
)
Indoor return air temperature (
℃
)
Outdoor temperature/Heating
Outdoor temperature/Cooling
12
26
24
22
20
18
16
14
30
28
24
26
12
14
16
18
28
30
20
22
Forced thermostat OFF
Cooling
Heating
(2) Operations of functional items during cooling/heating
Cooling
Heating
Dehumidifying
Fan
Operation
Functional item
Thermostat
ON
Thermostat
ON
Thermostat
OFF
Thermostat
OFF
Hot start
(Defrost)
Compressor
4-way valve
Outdoor unit fan
Indoor unit fan
Drain pump
(3)
(2)
(2)
/
/
(
)
(
)
/
/
/
/
Thermostat ON:
Thermostat OFF:
(2)
/
(2)
Note (1)
:
Operation
: Stop
/
: Turned ON/OFF by the control other than the room temperature control.
(2) ON during the drain motor delay control.
(3) Drain pump ON setting may be selected with the indoor unit function setting of the wired remote control.
(3) Dehumidifying (DRY) operation
Return air temperature thermistor [Thi-A (by the remote control when the remote control thermistor is enabled)] controls
the indoor temperature environment simultaneously.
(a) Operation is started in the cooling mode. When the difference between the return air temperature and the setting
temperature is 2°C or less, the indoor unit fan tap is brought down by one tap. That tap is retained for 3 minutes
after changing the indoor unit fan tap.
(b) If the return air temperature exceeds the setting temperature by 3°C during dehumidifying operation, the indoor unit
fan tap is raised. That tap is retained for 3 minutes after changing the indoor unit fan tap.
(c) If the thermostat OFF is established during the above control, the indoor unit fan tap at the thermostat ON is retained
so far as the thermostat is turned OFF.
