Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 124

( Ⅱ ) Models FDC71-140
(1) Determination of compressor speed (Frequency)
Required frequency
(a) Cooling/dehumidifying operation
Usual operation
Max. required
frequency
Silent mode, outdoor air temperature ≦ 15°C
Min. required frequency
Note (1) Value in ( ) are for the 3 phase models.
(b) Heating operation
Usual operation
Max. required
frequency
Silent mode
Min. required frequency
(c) If the indoor fan speed becomes "Me" or "Lo", Max required frequency goes down accordingly depending on indoor
unit model.
(d) Max. required frequency under high outdoor air temperature in cooling mode.
Maximum required frequency is selected according to the outdoor air temperature (Tho-A).
Max. required
frequency
(e) Max. required frequency under outdoor air temperature in heating mode.
Maximum required frequency is selected according to the outdoor air temperature (Tho-A).
Max. required
frequency
(f) Selection of max. required frequency by heat exchanger temperature.
(i) Maximum required frequency is selected according to the outdoor heat exchanger temperature (Tho-R) during
cooling/dehumidifying or according to the indoor heat exchanger temperature (Thi-R) during heating mode.
(ii) When there are 3 indoor heat exchanger temperatures (Thi-R), whichever the highest applies,
Max. required
frequency
Notes (1) Value in ( ) are for the FDC71 model.
(2) Value in 〔 〕 are for the 3 phase models.
(g) When any of the controls from (a) to (f) above may duplicate, whichever the smallest value among duplicated controls
is taken as the maximum required frequency.
(h) During heating, it is operated with the maximum required frequency until the indoor heat exchanger temperature
becomes 40°C or higher.
(2) Compressor 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.
Model
Model
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 heat exchanger
dehumidifying temperature is 56(61)°C or higher
Indoor heat exchanger
Heating
temperature is 56(61)°C or higher
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FDC71 FDC100 FDC125 FDC140
88 75
80 50
20 20
FDC71 FDC100 FDC125 FDC140
112 100
90 60
20 20
FDC71 FDC100 FDC125 FDC140
76 75
62 70
FDC71 FDC100 FDC125 FDC140
76 75
FDC71 FDC100 FDC125 FDC140
60 75
60 100
123
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'19 • PAC-T-327
Unit: rps
95(92) 95(92)
60 70
20 20
Unit: rps
120 120
70 70
20 20
Unit: rps
75 75
70 70
Unit: rps
80 85
Unit: rps
95 〔 92〕 95 〔 92〕
100 100