Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 135

(6) Cooling operation
(a) Summary
1) Capacity control
Model
Capacity
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 (28 ~ 120Hz)
The decision frequency is based on the total indoor demand frequency as follows:
Indoor demand frequency total
28 Hz or less
More than 28 Hz, but 120 Hz or less
More than 120 Hz
Note (1) The total indoor demand frequency is based on the value for each of the units shown in item (b).
(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.
Model (Indoor)
Operation Mode
Automatic
High
Medium
Low
Hi power
Econo
Note (1) The values in parenthesis ( ) indicate SRRM40HENG-L.
(c) Operation of Major Functional Components in Cooling Mode
Operation
Functional
components
Demand frequency
Fixed
Indoor
unit fan
Automatic
Outdoor unit fan
Solenoid Valve
(SVA, B, C, D)
Electronic
expansion valve
Compressor
(7) Heating Operation
(a) Summary
1) Capacity control
Model
Capacity
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 (28 ~ 120Hz)
The decision frequency is based on the total indoor demand frequency as follows:
Indoor demand frequency total
28 Hz or less
More than 28 Hz, but 120 Hz or less
More than 120 Hz
Note (1) The total indoor demand frequency is based on the value for each of the units shown in item (b).
SCM802HENG-L
1.5 ~ 8.4 kW
22 25
28 28
28 28
28 28
28 28
28 28
28 28
Thermostat OFF
Cooling
(All indoor units)
0
See preceding table
(All indoor units)
According to demand frequency According to mode switching
According to decision frequency OFF
ON According to stop mode
According to decision
According to stop mode
frequency
ON OFF
SCM802HENG-L
1.5 ~ 11.0 kW
SCM1002HENG-L
1.5 ~ 10.3 kW
Decision frequency
28 Hz
28 to 120 Hz
120 Hz
28 32
28 ~ 34 28 ~ 32
28 ~ 34 28 ~ 32
28 28
28 28
28 ~ 30 28 ~ 32
28 28
Thermostat OFF Fan, stop, abnormal stop
(Some of indoor units) (Some of indoor units)
0
(Thermostat off units) (Fan, stop, abnormal stop units)
According to mode switching
First speed or low
According to decision frequency
OFF
(Thermostat off units) (Fan, stop, abnormal stop units)
All closed
(Thermostat off units) (Fan, stop, abnormal stop units)
ON
SCM1002HENG-L
1.5 ~ 12.2 kW
Decision frequency
28 Hz
28 to 120 Hz
120 Hz
SCM-HG (4 room)
40 50
28 ~ 40 (28 ~ 34) 28 ~ 74
28 ~ 40 (28 ~ 34) 28 ~ 74
28 28 ~ 50
28 32
36 74
28 28
Failure
(Outdoor Unit)
0 0
(All units)
OFF
OFF
According to stop mode
All closed
According to stop mode
ON OFF
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