Miscellaneous Settings; Various Control Methods Using The Signal Input/Output Connector On Outdoor Unit - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[2-4 M-NET Address Settings ]
2-4-6

Miscellaneous Settings

Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 "OFF.")
When using indoor unit as a cooling-only unit, set SW3-1 to ON.
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.
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]
*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.
*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 the formula TH7>5°C holds true, the fan will not go into operation when the contact receives signal input.
*6 When using a base heater, change the setting using SW4. When using a base heater, error output will not be available.
(2) Example of wiring connection
CAUTION
1) Wiring should be covered by insulation tube with supplementary insulation.
2) Use relays or switches with IEC or equivalent standard.
3) The electric strength between accessible parts and control circuit should have 2750V or more.
BS_02_E
Usage
*5
Heating
TH7 > 3°C [37°F]
and
2
63LS > 4.6kg/cm
Function
DEMAND (level)
Low-noise mode
*3*4
(level)
Snow sensor signal
input (level)
Energy-saving
mode
Operation status of
the compressor
*6
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
CN3K
CN51 Adapter for
external out-
put
(PAC-
SC37SA-E)
Heating
TH7 < 0°C [32°F]
or
2
63LS < 3.9kg/cm
7
chapter 2 -