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1.4 Operation control function by the outdoor controller
(1)
Determination of compressor speed (frequency)
Required frequency
(a)
Cooling/dehumidifying operation
Max. required
frequency
Min. required frequency
(b) Heating operation
Max. required
frequency
Min. required frequency
(c)
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".
(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
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
(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 unit 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 supply breaker, it may enter the standby state for maximum 30 minutes
("
PREPARATION" 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 "P-Hi", "Hi"
Indoor unit air flow "Me", "Lo"
Model
Indoor unit air flow "P-Hi", "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
PREPARATION" is displayed for 3 seconds on the remote controller.
71
100
88
75
80
60
20
20
71
100
112
120
90
60
20
20
71
100
76
75
62
75
71
100
76
60
-R), whichever the highest applies,
I
71
100
–
–
–
100
-
15
-
'10 • PAC-SM-137A
Unit: rps
125
140
95
95
60
70
20
20
Unit: rps
125
140
120
120
70
70
20
20
Unit: rps
125
140
75
75
70
70
Unit: rps
125
140
80
85
-R) during heating mode.
I
Unit: rps
125
140
–
–
100
100
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