Various Control Methods Using The Signal Input/Output Connector On Outdoor Unit - Mitsubishi Electric PUHY-P200 Service Handbook

[2-4 M-NET Address Settings ]
2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor
Unit
(1) Various connection options
Type
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
system.
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.
Out- How to extract signals from the outdoor unit
put *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
Overview](page 28)
*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. When 3 outdoor units exist in one
refrigerant circuitsystem, 12 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
mode.
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 mode is effective
Cooling
TH7 < 30°C [86°F]
and
2
63HS1 < 32kg/cm
*5 If multiple outdoor units are connected to the same refrigerant circuit, signal input/output settings need to be made for each
outdoor unit.
*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 When using a base heater, change the setting using SW4. When using a base heater, error output will not be available.
HWE14040
Usage
*5*7
Heating
TH7 > 3°C [37°F]
and
2
63LS > 4.6kg/cm
- 25 -
Function
DEMAND (level)
Low-noise mode
*3*4
(level)
Snow sensor signal
input (level)
Auto-changeover
Energy-saving
mode
Operation status of
the compressor
*6*8
Error status
Capacity priority mode becomes effective
Cooling
TH7 > 35°C [95°F]
or
2
63HS1 > 35kg/cm
Terminal
to be Option
*1
used
*2
CN3D Adapter for
external input
(PAC-
SC36NA-E)
CN3S
CN3N
CN3K
CN51 Adapter for
*5
external out-
put
(PAC-
SC37SA-E)
Heating
TH7 < 0°C [32°F]
or
2
63LS < 3.9kg/cm
GB