Mitsubishi Electric PURY-P72TYJMU-A Service Handbook page 167

[ VII Control ]
-15- DEMAND Control
Cooling/heating operation can be prohibited (Thermo-OFF) by an external input to the indoor units.
When DIP SW4-4 is set to ON, the 4-step DEMAND control is enabled.
Eight-step demand control is possible in the system with two outdoor units.
Refer to Chapter II [3] 2. (7) "Various types of control using input-output signal connector on the outdoor unit (various connec-
tion options)" for details.(page 23)
HWE0913A - 158 - GB