Mitsubishi Heavy Industries SRK20ZJ-S Service Manual

-
30
-
'10 • SCM-SM-094
0 rps
A rps or less
More than A rps, but B rps or less
More than B rps
Decision speed
0 rps
A rps
A rps to B rps
B rps
Indoor compressor command total speed value
Model
A
B
30 rps
100 rps
SCM40ZJ-S
30 rps
120 rps
SCM45ZJ-S
30 rps
120 rps
SCM50ZJ-S
20 rps
120 rps
SCM60ZJ-S
20 rps
120 rps
SCM80ZJ-S
20 rps
120 rps
SCM71ZJ-S
Values of A, B
1.4 Outline of cooling operation
(1) Summary
(a) Capacity control
1) Indoor unit SRK xx ZJX-S models only
Model
Capacity
SCM40ZJ-S
1.8 ~ 5.9 kW
SCM45ZJ-S
1.8 ~ 6.4 kW
SCM50ZJ-S
1.8 ~ 7.1 kW
SCM60ZJ-S
1.8 ~ 7.5 kW
SCM80ZJ-S
1.8 ~ 9.2 kW
SCM71ZJ-S
1.8 ~ 8.8 kW
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
Model
Capacity
SCM40ZJ-S
1.8 ~ 5.8 kW
SCM45ZJ-S
1.8 ~ 6.3 kW
SCM50ZJ-S
1.8 ~ 6.9 kW
SCM60ZJ-S
1.8 ~ 7.3 kW
SCM80ZJ-S
1.8 ~ 8.7 kW
SCM71ZJ-S
1.8 ~ 8.3 kW
2) Indoor unit except SRK xx ZJX-S models
Functional
components
Operation
Command speed
Indoor
unit fan
Compressor
Outdoor unit fan
Electronic
expansion valve
ON
According to command speed
According to outdoor unit speed
According to decision
speed
0
(All indoor units)
OFF
According to stop mode
According to mode switching
OFF
0
(Thermostat off units)
ON
All closed
(Thermostat off units)
According to outdoor unit speed
According to mode switching
All closed
(Fan, stop, abnormal stop units)
0
(Fan, stop, abnormal stop units)
0
(All units)
ON
According to command speed
OFF
OFF
According to stop mode
Cooling
Thermostat OFF
(All indoor units)
Thermostat OFF
(Some of indoor units)
Fan, stop, abnormal stop
(Some of indoor units)
Failure
(Outdoor unit)
Fixed
Automatic
Multi-operation rpm calculated based
on the rpm required for each indoor unit
(2) Operation of major functional components in cooling mode
1.5 Outline of automatic operation
(1) SRK 20~60ZJX-S, SRF and SRR series
(a) Determination of operation mode
The unit checks the indoor air temperature and the outdoor air temperature after operating the indoor and outdoor blowers
for 20 seconds, determines the operation mode and the indoor air temperature setting correction value, and then enters in
the automatic operation.
27.5
25.5
19.5
18
30
Outdoor air temperature (°C)
Indoor air temperature (°C)
Dehumidifying
Heating
Cooling

Mitsubishi Heavy Industries SRK20ZJ-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRK20ZJ-S
Category	Air Conditioner
Language	English