-
158
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(c) Control parts operation during cooling and heating
Function
Control part
Cooling Fan Heating Dry
Thermostat
ON
Thermostat
OFF
–
Thermostat
ON
Thermostat
OFF
Hot start
(Defrost)
Defrosting
Compressor
×
×
×
/
×
4-way valve
××
×
×
Outdoor fan
×
×
×
/
×
Indoor fan
/
×
/
×
Louver motor
/
×
Condensate motor
×
(2)
×
(2)
(2)
Notes (1) :ON
× :OFF
/ × :According to control other than temperature control.
(2) Delay control of drain motor is ON.
Temperature difference between thermostat set
temp. and return air temp. (Detected by Th
I
-A)
Temperature difference between thermostat set
temp. and return air temp. (Detected by Th
I
-A)
Heating operation
OFF
+1-1
Set temp.by thermostat
Cooling operation
OFF
+1-1
Set temp.by thermostat
ON
(2) Operation control function by the indoor controller
(a) Room temperature control (Differential of thermostat)
(b) Automatic operation
If the Auto mode is selected on the remote control device, the selection of cooling or heating can be made automatically depend-
ing on the room temperature (and the temperature of indoor heat exchanger). (When the switching between the cooling and the
heating is made within 3 minutes, the compressor will not operate for 3 minutes.) This will make much easier the switching of
cooling/heating at the change of season and can be adapted to the unmanned operation at bank cash dispenser.
Notes (1) During the automatic switching of cooling/heating the room temperature
is controlled based on the setting of room temperature.
Notes (2) If the temperature of indoor heat exchanger rises beyond 59˚C during
the heating operation, it is switched automatically to the cooling opera-
tion. For an hour after this switching, the heating operation is suspended
regardless of the temperature as shown at left.
Heating operation
Cooling operation
Setting room temp.
Room temp. (detected at
Th
I
-A) [deg]
Ready for
heating
Suspended heating operation
Indoor heat exchanger temperature (˚C)
59
56
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