Mitsubishi Electric PUHY-P250YNW-A 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%
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
*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.
BS_02_C
Open
100% (No DEMAND)
0% (Compressor OFF)
(Wrong)
Demand control
steps
(Correct)
1-2P
1-2P 1-3P
Open Open
Short-circuit
Short-circuit Open
Short-circuit
CN3D 1-2P
Short-circuit
75%
50%
100% 0% 50%
100% 75% 50%
No.2 CN3D
Open
Open Short-circuit
100% 50%
50% 0%
88% 38%
75% 25%
(*3)
(*4, *5)
Short-circuit
Open Short-circuit
88% 75%
38% 25%
75% 63%
63% 50%
chapter 2 -
9