78
(b)
Mode switching
Within the selected mode, the unit operates using the values shown below which were obtained by multiplying a conversion
coefficient to the indoor unit demand frequency.
Note (1) The values in parenthesis ( ) indicate SRRM40HENG-L.
(c)
Operation of Major Functional Components in Heating Mode
Model (Indoor)
Operation Mode
Automatic
High
Medium
Low
Hi power
Econo
30
30
30
30
30
30
30 ~ 32
30 ~ 32
30
30
32
30
30 ~ 48
30 ~ 48
30 ~ 34
30
48
30
30 ~ 50
30 ~ 50
30 ~ 36
30
48
30
30 ~ 54
30 ~ 54
30 ~ 50 (30 ~ 44)
30
50 (54)
30
22
25
28
32
40
30 ~ 60
30 ~ 60
30 ~ 44
30
58
30
50
Functional
components
Operation
Demand frequency
Indoor
unit fan
Compressor
Outdoor unit fan
Electronic
expansion valve
(EVA, B, C, D)
See preceding table
ON
According to mode switching
According to demand frequency
According to decision frequency
According to decision
frequency
0
(All indoor units)
OFF
According to stop mode
OFF
OFF
OFF
0
(Thermostat off units)
ON
100 Pulses
(Thermostat off units)
OFF
OFF
According to decision frequency
100 Pulses
(Stop, abnormal stop units)
0
(Stop, abnormal stop units)
0
(All units)
ON
OFF
Hot Keep
Hot Keep
OFF
According to stop mode
Heating
Thermostat OFF
(All indoor units)
Thermostat OFF
(Some of indoor units)
Stop, abnormal stop
(Some of indoor units)
Failure
(Outdoor Unit)
Fixed
Automatic
(d) Hot Standby
(When any of the following conditions is met, Hot Standby operation is activated.)
(i)
Operating conditions
1
When 4 seconds have passed since the power was turned on.
2
Under the following conditions.
a
When the temperature detected by the outdoor air temperature thermistor is at the ON level as shown in
the figure, and when 30 continuous minutes have passed since the decitsion frequency has become 0
Hz after cooling or heating has been stopped.
b
When 20 minutes have passed since the power was turned on and the outdoor air temperature thermistor is in
the ON range.
(ii)
Function
Low voltage is applied from the inverter to the compressor to preheat it. This melts and vaporizes refrigerant that has frozen
inside the freezer oil, making it easier for the refrigerant to circulate when the heating operation is started. This makes the
start of the heating operation faster.
(7)
Heating Operation
(a)
Summary
1)
Capacity control
Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity
of the outdoor unit, the demand capacity will be proportionally distributed.
2)
Outdoor unit frequency control
(30 ~ 104Hz)
The decision frequency is based on the total indoor demand frequency as follows:
Note (1) The total indoor demand frequency is based on the value for each of the units shown in item (b).
Model
Capacity
SCM80ZA
2.0 ~ 10.8 kW
30 Hz or less
More than 30 Hz, but 104 Hz or less
More than 104 Hz
Decision frequency
30 Hz
30 to 104 Hz
104 Hz
Indoor demand frequency total
Outdoor air temperature
22
°
C
24
°
C
ON
OFF
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