Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 175

FDC 71 - 250 models
(a) Determination of compressor speed (frequency)
Required frequency
1) Cooling/dehumidifying operation
Max. required
frequency
Min. required frequency
2) Heating operation
Max. required
frequency
Min. required frequency
3) If "Silent mode start" signal is received from the remote controller, the maximum required frequency becomes same as
when the indoor air flow is set at "LO".
4) Max. required frequency under high ambient temperature in cooling mode
Maximum required frequency is selected according to the outdoor air temperature (Tho-A).
Max. required
frequency
5) Max. required frequency under ambient temperature in heating mode
Maximum required frequency is selected according to the outdoor air temperature (Tho-A).
Max. required
frequency
6) Selection of max. required frequency by heat exchanger temperature
1) Maximum required frequency is selected according to the outdoor unit heat exchanger temperature (Tho-R) during
cooling/dehumidifying or according to the indoor unit heat exchanger temperature (Th
2) When there are 3 indoor unit heat exchanger temperatures (Th
Max. required
frequency
7) When any of the controls from 1) to 6) above may duplicate, whichever the smallest value among duplicated controls is
taken as the maximum required frequency.
8) During heating, it is operated with the maximum required frequency until the indoor unit heat exchanger temperature
becomes 40°C or higher.
(b) Compressor start control
1) Compressor starts upon receipt of the thermostat ON signal from the indoor unit.
2) However, at initial start after turning the power supply breaker, it may enter the standby state for maximum 30 minutes
(" " is displayed on the remote controller) in order to prevent the oil loss in the compressor.
If the cooling/dehumidifying/heating operation is selected from the remote controller when the outdoor unit is in the
standby state, "
Model
Indoor unit air flow "Hi"
Indoor unit air flow "Me", "Lo"
Model
Indoor unit air flow "Hi"
Indoor unit air flow "Me", "Lo"
Model
Outdoor air temperature is
40°C or higher
Outdoor air temperature is
46°C or higher
Model
Outdoor air temperature is
18°C or higher
Model
Cooling/ Outdoor unit heat exchanger
dehumidifying temperature is 56°C or higher
Indoor unit heat exchanger
Heating
temperature is 56°C or higher
" is displayed for 3 seconds on the remote controller.
71 100
88 90
76 60
20 20
71 100
95 90
86 60
20 20
71 100
76 75
60 75
71 100
74 60
-R), whichever the highest applies,
I
71 100
– –
– –
168
– –
125 140 200
105 105 100
80 85 70
20 20 30
125 140 200
105 110 100
80 85 70
20 20 30
125 140 200
90 96 75
75 75 66
125 140 200
80 85 70
-R) during heating mode.
I
125 140 200
100 100 –
100 100 –
Unit: rps
250
120
80
30
Unit: rps
250
120
80
30
Unit: rps
250
98
66
Unit: rps
250
80
Unit: rps
250
–
–