Mitsubishi Electric PURY-P72 Service Handbook page 32

[II Restrictions]
(5) Various start-stop controls (Indoor unit settings)
Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10.
Function
Operation of the indoor unit when the operation is resumed after the unit
Setting (SW1)"4 *5
was stopped
9 10
Power ON/OFF by the Indoor unit will go into operation regardless of its operation status before OFF ON
plug*1:2:3
power off (power failure). (In approx. S minutes)
Automatic restoration Indoor unit will go into operation if it was in operation when the power was ON OFF
after power failure turned off (or cut off due to power failure). (In approx. S minutes)
Indoor unit will remain stopped regardless of its operation status before OFF ON
power off (power failure).
*1. Do not cut off power to the outdoor unit. Cutting off the power supply to the outdoor unit will cut off the power supply to the
crankcase heater and may cause the compressor to malfunction when the unit is put back into operation.
*2. Not applicable to units with a built-in drain pump or humidifier.
*3. Models with a built-in drain pump cannot be turned on/off by the plug individually. All the units in the same refrigerant cir-
cuits will be turned on or off by the plug.
*4. Requires that the dipswitch settings for all the units in the group be made.
*S. To control the external input to and output from the air conditioners with the PLC software for general equipment via the
G(B)-SOA, set SW1-9 and SW1-10 to ON. With these settings made, the power start-stop function becomes disabled. To
use the auto recovery function after power failure while these settings are made, set SW1-S to ON.
(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.
(7) Various types of control using input-output signal connector on the outdoor unit (various connection options)
Terminal
Type Usage Function
to
b~
Option
used 1
Input Prohibiting cooling/heating operation (thermo OFF) by an external DEMAND (level)
CN3D*2
Adapter for
input to the outdoor unit. external input
Performs a low level noise operation of the outdoor unit by an ex- Low-noise mode
(PAC-
ternal input to the outdoor unit.
(Jevelj*3 *4
SC36NA-E)
* 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- Snow sensor signal CN3S
nals from the snow sensor. *5
input (level)
Cooling/heating operation can be changed by an external input to
Auto-changeover CN3N
the outdoor unit.
Out-
How to extract signals from the outdoor unit Operation status of CNS1 Adapter for
put
*It can be used as an operation status display device.
the compressor *5 external out-
*/t can be used for an interlock operation with external devices.
Error status*6
put
(PAC-
SC37SA-E)
*1. For detailed drawing, refer to "Example of wiring connection".
*2. For details, refer to 1) through 4) shown below.
*3. Low-noise mode is valid when Dip SW4-4 on the outdoor unit is set to OFF. When DIP SW4-4 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 SWS-S, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri-
ority mode.
When SWS-S is set to ON: The low-noise mode always remains effective.
When SWS-S 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.
Capacity priority mode becomes effective.
Cooling Heating
Cooling Heating
TH7<30°C[86°F] and TH7>3°C[3rF] and TH7>3S°C[9S0F] or TH7<0°C[32°F] or
63HS1 <32kg/cm 2 63LS>4.6kg/cm 2 63HS1 >3Skg/cm 2 63LS<3.9kg/cm 2
*5. Each outdoor unit in the system with multiple outdoor units requires the signal inpuVoutput setting to be made.
*6. Take out signals from the outdoor unit (OC) if multiple outdoor units exist in a single system.
HWEOB03A - 22- GB