Mitsubishi Electric PUHY-P1000, Service Handbook

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[2-4 M-NET Address Settings ]
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HWE14040 GB
2 Rest
rict
io
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2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor
Unit
(1) Various connection options
*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).
*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.
Type Usage Function
Terminal
to be
used
*1
Option
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.
DEMAND (level) CN3D
*2
Adapter for
external input
(PAC-
SC36NA-E)
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. Low-noise mode
(level)
*3*4
Forces the outdoor unit to perform a fan operation by receiving sig-
nals from the snow sensor.
*5*7
Snow sensor signal
input (level) CN3S
Cooling/heating operation can be changed by an external input to
the outdoor unit. Auto-changeover CN3N
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. Energy-saving
mode CN3K
Out-
put
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.
Operation status of
the compressor
*5
CN51 Adapter for
external out-
put
(PAC-
SC37SA-E)
Error status
*6*8
Low-noise mode is effective Capacity priority mode becomes effective
Cooling Heating Cooling Heating
TH7 < 30°C [86°F]
and
63HS1 < 32kg/cm
2
TH7 > 3°C [37°F]
and
63LS > 4.6kg/cm
2
TH7 > 35°C [95°F]
or
63HS1 > 35kg/cm
2
TH7 < 0°C [32°F]
or
63LS < 3.9kg/cm
2