Daikin J Series Service Manual Page 52

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SiE18-201 Main Functions
Main Functions 41
1.1.10 Automatic Operation (Heat Pump Only)
Automatic Cooling/Heating Function
When the AUTO mode is selected with the remote controller, the microcomputer automatically
determines the operation mode from cooling and heating according to the room temperature
and setting temperature at the time of the operation startup, and automatically operates in that
mode.
The unit automatically switches the operation mode to cooling or heating to maintain the room
temperature at the main unit setting temperature.
Detailed
explanation of the
function
1. Remote controller setting temperature is set as automatic cooling / heating setting
temperature (18 to 30˚C).
2. Main unit setting temperature equals remote controller setting temperature plus correction
value (correction value / cooling: 0 deg, heating: 2 deg.).
3. Operation ON / OFF point and mode switching point are as follows.
Heating Cooling switching point: Room temperature Main unit setting temperature
+2.5 deg.
Cooling Heating switching point: Room temperature < Main unit setting temperature –
2.5 deg.
Thermostat ON / OFF point is the same as the ON / OFF point of cooling or heating
operation.
4. During initial operation
Room temperature Remote controller setting temperature: Cooling operation
Room temperature < Remote controller setting temperature: Heating operation
However, in the automatic Powerful cooling/heating mode, the guard timer is set as follows to
prevent hunting in cooling / heating mode.
0.5 C
LHz LHz LHz
*55Hz
*55Hz
LHz indicates low frequency. Item marked with varies depending on models.
ON point
Frequency switching
point
OFF point
5 min 5 min
Compressor
control
Stop
Stop Stop Stop
Stop Stop
Indoor unit fan
Extra-low air flow
Extra-low air flow
Low air flow
Low air flow
(ML047)
Heating
/
cooling switching point
2.5 deg.
or higher
(Heating thermostat
OFF point)
Main unit setting
temperature
(Cooling thermostat
OFF point)
Cooling
/
heating switching point
Cooling
operation
Heating
operation
Cooling
operation
With compressor capacity supplied
With no compressor capacity supplied
(1.5 deg.)
or higher
Less than
(1.5 deg.)
2.5 deg.
or higher
(RL022)
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