Mitsubishi Electric PUHY-P1000, Service Handbook, Page: 38 / 334

[2-5 Demand Control Overview ]
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HWE14040 GB
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2) When SW6-8 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND)
(*3)
*3. Input the order to CN3D on the outdoor unit whose SW6-8 is set to ON.
3) When SW6-8 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND)
(*4, *5)
*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)
(*4)
*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.
CN3D 1-2P
CN3D 1-3P Open Short-circuit
Open 100% (No DEMAND) 75%
Short-circuit 0% (Compressor OFF) 50%
8 levels of on-DEMAND No.2 CN3D
1-2P Open Short-circuit
No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit
Open Open 100% 50% 88% 75%
Short-circuit 50% 0% 38% 25%
Short-circuit Open 88% 38% 75% 63%
Short-circuit 75% 25% 63% 50%
12 levels
of on-DE-
MAND No.2 CN3D 1-2P Open
1-3P Open Short-circuit
No.3 CN3D 1-2P Open Short-circuit Open Short-circuit
No.1
CN3D 1-2P 1-3P Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Open 100% 67% 92% 84% 67% 34% 59% 50%
Short-
circuit 67% 34% 59% 50% 34% 0% 25% 17%
Short-circuit Open 92% 59% 84% 75% 59% 25% 50% 42%
Short-
circuit 84% 50% 75% 67% 50% 17% 42% 34%
12 levels
of on-DE-
MAND No.2 CN3D 1-2P Short-circuit
1-3P Open Short-circuit
No.3 CN3D 1-2P Open Short-circuit Open Short-circuit
No.1
CN3D 1-2P 1-3P Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Open 92% 59% 84% 75% 84% 50% 75% 67%
Short-
circuit 59% 25% 50% 42% 50% 17% 42% 34%
Short-circuit Open 84% 50% 75% 67% 75% 42% 67% 59%
Short-
circuit 75% 42% 67% 59% 67% 34% 59% 50%
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.
(Wrong)
(Correct)
100%
100%
0%
75%
50%
50%
Demand control
steps
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%