Mitsubishi Electric R410A Service Handbook page 36

[2-5 Demand Control Overview ]
2) When SW6-8 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND)
CN3D 1-3P
Open
Short-circuit
*3. Input the order to CN3D on the outdoor unit whose SW6-8 is set to ON.
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%
Demand control
steps
If the step listed as the wrong example above is taken, thermo may go off.
The percentage of the demand listed in the table above is an approximate value based on the
compressor volume and does not necessarily correspond with the capacity.
When this function is enabled, the night mode cannot be enabled.
3) When SW6-8 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND)
8 levels of on-DEMAND
No.1 CN3D 1-2P
Open
Short-circuit
*4. Input the order to CN3D on the outdoor unit whose SW6-8 is set to ON.
*5. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW6-8 is set to ON.
4) When SW6-8 on the all outdoor units in one refrigerant circuit system is set to ON (12 levels of on-DEMAND)
12 levels No.2 CN3D
of on-DE-
MAND
No.3 CN3D
No.1 1-2P
CN3D
Open
Short-circuit
12 levels No.2 CN3D
of on-DE-
MAND
No.3 CN3D
No.1 1-2P
CN3D
Open
Short-circuit
*3. Input the order to CN3D on the outdoor unit whose SW6-8 is set to ON.
*4. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW6-8 is set to ON.
HWE14080
CN3D 1-2P
Open
100% (No DEMAND)
0% (Compressor OFF)
(Wrong) 100%
(Correct) 100%
1-2P
1-3P
Open 100%
Short-circuit 50%
Open 88%
Short-circuit 75%
1-2P
1-3P Open
1-2P Open
1-3P Open Short-
circuit
Open 100% 67%
Short- 67% 34%
circuit
Open 92% 59%
Short- 84% 50%
circuit
1-2P
1-3P Open
1-2P Open
1-3P Open Short-
circuit
Open 92% 59%
Short- 59% 25%
circuit
Open 84% 50%
Short- 75% 42%
circuit
- 27 -
Short-circuit
75%
50%
0% 50%
75% 50%
No.2 CN3D
Open
Open Short-circuit
50%
0%
38%
25%
Open
Short-circuit
Open Short- Open
circuit
92% 84% 67%
59% 50% 34%
84% 75% 59%
75% 67% 50%
Short-circuit
Short-circuit
Open Short- Open
circuit
84% 75% 84%
50% 42% 50%
75% 67% 75%
67% 59% 67%
(*3)
(*4, *5)
Short-circuit
Open Short-circuit
88% 75%
38% 25%
75% 63%
63% 50%
(*4)
Short-circuit
Open Short-circuit
Short- Open Short-
circuit circuit
34% 59% 50%
0% 25% 17%
25% 50% 42%
17% 42% 34%
Short-circuit
Open Short-circuit
Short- Open Short-
circuit circuit
50% 75% 67%
17% 42% 34%
42% 67% 59%
34% 59% 50%
GB