Mitsubishi Electric PURY-RP200 Service Handbook page 36

[ II Restrictions ]
(8) Demand control
1) General outline of control
Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC).
Between 2 and 4 steps of demand control is possible by setting Dip SW4-4 on the outdoor units (OC).
No Demand control switch
1 2 steps (0-100%)
2 4 steps (0-50-75-100%)
*1 If wrong sequence of steps are taken, the units may go into the Thermo-OFF (compressor stop) mode.
Ex) When switching from 100% to 50%
(Incorrect) 100%→0%→50% The units may go into the Thermo-OFF mode.
(Correct) 100%→75%→50%
*2 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 actual capacity.
*3 Notes on using demand control in combination with the low-noise mode
To enable the low-noise mode, it is necessary to short-circuit 1-2 pin of CN3D on the outdoor unit whose SW4-4 is set to OFF.
2) Contact input and control content
2-step demand control
The same control as the Thermo-OFF is performed by closing 1-3 pin of CN3D.
CN3D
1-3
Open
Close
4-step demand control (When SW4-4 is set to ON on an outdoor unit)
Demand capacity is shown below.
CN3D
1-3P
Open
Close
HWE10020
DipSW4-4
OC
OFF
ON
100%
0%
1-2P
Open Close
100% 75%
0% 50%
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Input to CN3D
OC
OC
GB