Mitsubishi FDT71VH - Page 42

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41
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'20 • PAC-SM-351
(a) Compressor protection start I
[Control condition] Normally, the compressor operation frequency is raised in this start pattern.
[Control contents] (i) Starts with the compressor’s target frequency at
A
rps.
However, when the outdoor air temperature (Tho-A) is 35°C or higher during cooling/
dehumidifying or the indoor return air temperature (Thi-A) is 25°C or higher during heating, it
starts at
C
rps.
(ii) At 30 seconds after the start of compressor, its target frequency changes to
B
rps and the
compressorisoperatedfor2-4minuteswithitsoperationfrequencyxedat
B
rps.
Model Operation mode
A rps B rps C rps
FDC100-140
Cooling/Dehumidifying 35 35 25
Heating 35 35 25
(b) Compressor protection start III
[Control condition] Number of compressor starts is only 1 counted after the power source breaker ON.
[Control contents] Operates by selecting one of following start patterns according to the operation mode and the
outdoor air temperature (Tho-A).
(i) Low frequency operation control during cooling/dehumidifying
[Control condition] Upon establishing the conditions of compressor protection start III, the low frequency
operation control is performed during cooling/dehumidifying.
[Control contents] 1) Starts with the compressor’s target frequency at
A
rps. When the outdoor air temperature
(Tho-A) is 35°C or higher, it starts at
C
rps.
2) At 30 seconds after the compressor start, the compressor’s target frequency is changed to
B
rpsandthecompressor’soperationfrequencyisxedfor10minutes.
Model Operation mode
A rps B rps C rps
FDC100-140 Cooling/Dehumidifying 35 35 25
(ii) Low frequency operation control during heating
[Control condition]
When the conditions of compressor protection start III are established and one of following
conditions1)is satised, the lownumberofrevolutions operation control is performed during
heating.
1) At 30 minutes or more after turning the power source breaker on.
[Control contents]
1) Starts the compressor with its target frequency at
A
rps. However, when the indoor
return air temperature (Thi-A) is 25°C or higher, it starts at
C
rps.
2) At 30 seconds after the start of compressor, the compressor’s target frequency is changed to
B
rpsandthecompressor’soperationfrequencyisxedfor10minutes.
Model Operation mode
A rps B rps C rps
FDC100-140 Heating
35 35 25
(3) Compressor soft start control
(a) Compressor starts upon receipt of the thermostat ON signal from the indoor unit.
(b) However, at initial start after turning the power source breaker, it may enter the standby state for maximum 30 minutes
(“
PREPARATION” is displayed on the remote control) in order to prevent the oil loss in the compressor.
If the cooling/dehumidifying/heating operation is selected from the remote control when the outdoor unit is in the
standby state, “
PREPARATION” is displayed for 3 seconds on the remote control.
(2) Compressor start control