[ II Restrictions ]
- 21 -
HWE1018A GB
(3) Settings of MA remote controller Main/Sub switching switch (When MA remote controller is used: factory setting
"Main")
Main/sub settings are available on the MA remote controller. When two remote controllers are connected, set either of them
to "Sub".
(4) Selecting the position of temperature detection for the indoor unit (Factory setting: SWC "Standard")
To use a suction temperature sensor, set SWC to "Option". (The suction temperature sensor is supplied as standard specifi-
cation.)
(5) Connection of two refrigerant circuits
When two refrigerant circuits are connected on site, make the switch settings on the controller circuit board following the in-
structions described in the installation manual for the indoor unit.
(6) Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 on the indoor unit to "OFF.")
When using indoor unit as a cooling-only unit, set SW3-1 on the indoor unit to ON.
(7) Various types of control using input-output signal connector on the outdoor unit (various connection options)
*4. By setting Dip SW5-5, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri-
ority mode.
When SW5-5 is set to ON: The Low-noise mode always remains effective.
When SW5-5 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. When multiple outdoor units exist in one refrigerant circuit system, settings on every outdoor unit (signal input) are re-
quired.
*6. Take out signals from the outdoor unit (OC) if multiple outdoor units exist in a single system.
Type Usage Function
Terminal
to be
used
*1
*1. For detailed drawing, refer to "Example of wiring connection".
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 refriger-
ant system.
DEMAND (level) CN3D
*2
*2. For details, refer to 1) through 2) shown below.
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
*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.
Forces the outdoor unit to perform a fan operation by receiving sig-
nals from the snow sensor.
*5
Snow sensor signal
input (level)
CN3S
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
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
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