Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 30

1.4 Operation control function by the outdoor control
Models FDC200, 250, 280VSA-W
(1) Determination of compressor speed (Frequency)
Required frequency
(a) Cooling/dehumidifying operation.
Max. required
frequency
Min. required frequency
Note(1) Value in (
(b) Heating operation.
Max. required
frequency
Min. required frequency
Note s (1) Value in (
(2) Value in 〔 〕 are for FDU series.
(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 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 temperature (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 so that the required frequency adds 5 rps every 1 minute 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
) are for the SW7-3 OFF.
Model
Usual operation
Silent mode
) are for the SW7-3 OFF.
Model
Outdoor air temperature is
35°C or higher
Outdoor air temperature is
42°C or higher
Model
Outdoor air temperature is
10°C or higher
Outdoor air temperature is
18°C or higher
Model
Cooling/ Outdoor heat exchanger
dehumidifying temperature is 55°C or higher
Indoor heat exchanger
Heating
temperature is 55°C or higher
FDC200 FDC250 FDC280
120 120
68 100
50 (68) 70 (100) 80 (100)
20 20
FDC200 FDC250 FDC280
120 120
76 (94) 70 (100) 80 (100)
20 〔23〕 20 〔23〕
24
FDC200 FDC250 FDC280
106 106
90 90
FDC200 FDC250 FDC280
120 120
120 120
FDC200 FDC250 FDC280
120 120
120 120
29
- -
'21 • PAC-SM-383
Unit: rps
120
100
20
Unit: rps
120
Unit: rps
114
98
Unit: rps
120
120
Unit: rps
120
120