Mitsubishi Heavy Industries FDUA160AVSAVH Service Manual page 29

1.1.4 Operation control function by the outdoor control
(1) Determination of compressor speed (Frequency)
Required frequency
(a) Cooling/dehumidifying operation
Max. required
frequency
Min. required frequency
Note(1) Value in ( ) are for the SW7-3 OFF.
(b) Heating operation
Max. required
frequency
Min. required frequency
Note (1) Value in ( ) are for the SW7-3 OFF.
(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 high 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 unit 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.
When there are 2 outdoor heat exchanger temperatures (Tho-R), whichever the higher applies.
Max. required
frequency
(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.
Model
Usual operation
Outdoor air temperature ≦ 15°C or
Indoor return air temperature ≦ 20°C
Silent mode
Model
Usual operation
Silent mode
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
Outdoor air temperature is
10°C or higher
Model
Cooling/ Outdoor heat exchanger
dehumidifying temperature is 56°C or higher
Indoor heat exchanger
Heating
temperature is 56°C or higher
-
Unit: rps
160 200
85 120
85 100
70（85） 70（100）
20 20
Unit: rps
160 200
100 120
70（100） 70（100）
20 20
Unit: rps
160 200
85 120
85 120
Unit: rps
160 200
100 120
100 120
Unit: rps
160 200
85 120
100 120
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'21 • PAC-SM-398