Mitsubishi Heavy Industries FDT100VNP1VF2 Technical Manual page 126

(d) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote
control.
■ Selection of cooling/heating external input function
External input selection
External input selection
Cooling/heating selection
Notes (1) Regarding the priority order for combinations of CnT and CnTA, refer to Page 121.
(24) Fan control at heating startup
(a) Starting conditions
At the start of heating operation, if the difference of setting temperature and return air temperature is 5°C or higher after
the end of hot start control, this control is performed.
(b) Contents of control
(i) Sampling is made at each minute and, when the indoor unit heat exchanger temperature (detected with Thi-R) is
37°C or higher, present number of revolutions of indoor unit fan speed is increased by 10min
(ii) If the indoor unit heat exchanger temperature drops below 37°C at next sampling, present number of revolutions of
indoor unit fan speed is reduced by 10min
(c) Ending conditions
Indoor fan speed is reduced to the setting airflow volume when the compressor OFF is established and at 30 minutes after
the start of heating operation.
(25) Room temperature detection temperature compensation during heating
With the standard specification, the compressor is turned ON/OFF with the thermostat setting temperature. When the thermostat
is likely to turn OFF earlier because the unit is installed at the ceiling where warm air tends to accumulate, the setting can be
changed with the wired remote control indoor unit function "
one of the setting temperature +3, +2 or +1°C in order to improve the feeling of heating. The setting temperature, however, has
the upper limit of 30°C.
Standard
Compressor
Setting temperature
(26) Return air temperature compensation
This is the function to compensate the deviation between the detection temperature by the return air temperature thermistor and
the measured temperature after installing the unit.
(a) It is adjustable in the unit of 0.5°C with the wired remote control indoor unit function "RETURN AIR TEMP".
• +1.0°C, +1.5°C, +2.0°C
(b) Compensated temperature is transmitted to the remote control and the compressor to control them.
Note (1) The detection temperature compensation is effective on the indoor unit thermistor only.
(27) High power operation (RC-EX1A only)
It operates at with the set temp. fixed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15 minutes
maximum.
External input method
⑤ Level
⑥ Pulse
Operation
Stop
-1 +1
Room temperature (°C)
• -1.0°C, -1.5°C, -2.0°C
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
-1 .
". The compressor and the heater are turned ON/OFF at
When it is set at +3°C
Compressor
Setting temperature
125
- -
'16 • PAC-T-240
Operation
ON
OFF
OFF
Cooling zone Heating zone Cooling zone
Heating
Cooling Cooling
Heating
Cooling Cooling
↑Heating, auto, heating mode command
Auto, cooling, dry mode command↑
from remote control from remote control
ON
OFF OFF
Heating zone
↑After setting "Cooling/heating selection", the cooling/heating is
selected by the current operation mode.
During heating:: Set at the heating zone (cooling prohibition zone).
During cooling, dry, auto and fan mode: Set
at cooling zone (heating prohibition zone).
Heating
Auto
Cooling
Heating
Auto
Cooling
↑Set "Cooling/ ↑Auto, cooling, dry mode command
Heating" "Pulse" by remote control
-1 .
Operation
Stop
+2 +4
Room temperature (°C)
ON
Heating zone
Heating
Heating
ON
Cooling zone
Cooling
Cooling
↑Auto, heating mode
command by remote control