[2-4 M-NET Address Settings ]
Various Control Methods Using the Signal Input/Output Connector on Outdoor
(1) Various connection options
Input Prohibiting cooling/heating operation (thermo OFF) by an external
input to the outdoor unit.
*It can be used as the DEMAND control device for each system.
Performs a low level noise operation of the outdoor unit by an ex-
ternal input to the outdoor unit.
* It can be used as the silent operation device for each refrigerant
Forces the outdoor unit to perform a fan operation by receiving sig-
nals from the snow sensor.
Cooling/heating operation can be changed by an external input to
the outdoor unit.
The operation mode of the unit can be changed from normal cool-
ing operation (performance priority) to energy-saving cooling mode
by an external signal input.
How to extract signals from the outdoor unit
*It can be used as an operation status display device.
*It can be used for an interlock operation with external devices.
*1 For details, refer to section (2) Example of wiring connection.
*2 For details, refer to section (2) Example of wiring connection and other relevant sections in the manual. [2-5 Demand Control
*3 Low-noise mode is valid when Dip SW6-8 on the outdoor unit is set to OFF. When DIP SW6-8 is set to ON, 4 levels of on-
DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2 or more
outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.
*4. By setting Dip SW6-7, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise priority
When SW6-7 is set to ON: The low-noise mode always remains effective.
When SW6-7 is set to OFF: The low noise mode is cancelled when certain outside temperature or pressure criteria are met,
and the unit goes into normal operation (capacity priority mode).
Low-noise mod is effective.
*5 If multiple outdoor units are connected to the same refrigerant circuit, signal input/output settings need to be made for each
*6 Take out signals from the outdoor unit that is designated as OC if multiple outdoor units in the same system.
*7 If the formula TH7>5 holds true, the fan will not go into operation when the contact receives signal input.
*8 On the TKMU-A-H models, the error signal output function is disabled at default settings. Change the DipSW4 (No. 974) setting
to use the error signal output function. When the setting is changed, base heaters cannot be used.
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Snow sensor signal
Operation status of
Capacity priority mode becomes effective.