Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 195

7.3.2 Outline of cooling operation
(1) Summary
(a) Capacity control
(i) Indoor unit SRK ** ZSX models only
Model
Capacity
(ii) Indoor unit except SRK ** ZSX models
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.
(b) Outdoor compressor speed control
Indoor compressor command total speed value
0 rps
A rps or less
More than A rps, but B rps or less
More than B rps
Values of A, B
Model
A
B
(2) Operation of major functional components in cooling mode
Operation
Functional
components
Command speed
Fixed
Indoor
unit fan
Automatic
Outdoor unit fan
Electronic
expansion valve
Compressor
SCM71ZM-S1 SCM80ZM-S1
1.8 8.8 kW 1.8 9.2 kW
SCM71ZM-S1 SCM80ZM-S1
1.8 8.3 kW 1.8 8.7 kW
Decision speed
0 rps
A rps
A rps to B rps
B rps
SCM71ZM-S1 SCM80ZM-S1
20 rps 20 rps
120 rps 120 rps
Thermostat OFF
Cooling
(All indoor units)
Multi-operation rpm calculated based
on the rpm required for each indoor unit (All indoor units)
According to command speed According to mode switching
According to outdoor unit speed
According to decision
According to stop mode
speed
ON
Thermostat OFF
(Some of indoor units)
0 0
(Thermostat off units)
According to mode switching
OFF According to outdoor unit speed
All closed
(Thermostat off units)
OFF ON
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Fan, stop, abnormal stop
(Some of indoor units) (Outdoor unit)
0
(Fan, stop, abnormal stop units)
According to command speed
All closed
According to stop mode
(Fan, stop, abnormal stop units)
ON
Failure
0
(All units)
OFF
OFF