Mitsubishi Electric FDF100VSXVD Technical Manual page 92

(g) Hot keep
Hot keep control is performed at the start of the defrost control.
1) Control
a) When the indoor heat exchanger temperature (detected with Th
indoor fan is changed to the lower tap at each setting.
b) During the hot keep, the louver horizontal control signal is transmitted.
2) Ending condition
temperature rises to 45°C or higher.
(h) Thermostat operation
(1) Cooling
1) Thermostat is operated by the room temperature control.
2) Thermostat is turned ON or OFF depending on the setting temperatures of room temperature.
Thermostat OFF
Setting temperature of room temperature
3) Thermostat is turned ON if the room temperature is in the range of -1 < Setting point < +1 at the start of heating
operation (including from cooling to heating).
(2) Heating
1) Thermostat is operated by the room temperature control.
2) Thermostat is turned ON or OFF depending on the setting temperatures of room temperature.
Heater ON
−1
3) Thermostat is turned ON if the room temperature is in the range of -1 < Setting point < +1 at the start of heating operation
(including from cooling to heating).
(3) Fan control during the heating thermostat OFF
1) When the heating thermostat is turned OFF, following fan controls can be selected according to the indoor unit
function setting on the wired remote controller.
① Low fan speed (Factory default)
2) If "Low fan speed (Factory default)" is selected, the fan is operated with the indoor unit fan tap at ULo.
3) If "Set fan speed" is selected, the fan is operated with the set fan speed even if the thermostat is turned OFF.
4) If "Intermittent" is selected, following controls take place.
a) The indoor unit on which the thermostat is turned OFF during heating operation changes to the hot control and, if
the heat exchanger temperature sensors (both ThI-R1 and –R2) detect 25°C or lower, turns OFF the indoor fan.
the meantime, the lover is controlled at the horizontal position.
c) After operating at ULo for 2 minutes, the indoor unit changes to the state of a) above.
d) If the thermostat is turned ON, the unit changes to the hot start control.
e) If the heating thermostat is turned OFF, the remote controller displays the temperature detected when the indoor
fan is stopped. Thereafter, the temperature is updated when the indoor fan is changed from ULo to stop.
The remote controller displays temperatures according to the operation data display control and updates
temperatures even if the indoor fan is turned OFF.
f) If the unit operation is changed to the defrosting mode while the heating thermostat is turned OFF or if the
thermostat is turned OFF during defrosting, the indoor fan is turned OFF. (Hot keep and hot start controls
override.) Suction temperature, however, is updated at every 7-munite.
Thermostat ON
−1 ＋1
Thermostat ON
−1
＋1
3℃
Setting temperature of room temperature
② Set fan speed
-R1 or R2) drops to 35°C or lower, the speed of
I
Temperature drop
Temperature rise
Thermostat OFF
＋1
Heater OFF
③ Intermittent
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Temperature rise
Temperature drop
④ Fan OFF