Mitsubishi Electric PUHY-(E)P200 Service Handbook page 32

[ II Restrictions ]
(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)
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.
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 detailed drawing, refer to "Example of wiring connection".
*2. For details, refer to 1) through 4) shown below.
*3. Silent 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 silent 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. Silent mode can be switched from ability main to silent main with Dip SW5-5 on the outdoor unit. Dip SW5-5 OFF: ability
main (ability main mode : The noise level is reduced by limiting the maximum fan frequency under the following condition.
Cooling mode : outdoor temp. (TH7) < 30°C[86°F] Heating mode : outdoor temp. (TH7) > 3°C[37°F]), ON: Emphasizes
quiet
*5. When multiple outdoor units exist in one refrigerant circuit system, settings on every outdoor unit (signal input) are re-
quired.
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.
HWE07010
Usage
*5
- 23 -
Terminal
Function
to be
used
DEMAND (level) CN3D
SIlent mode (level)
*3*4
(Night mode)
Snow sensor signal CN3S
input (level)
Auto-changeover CN3N
Operation status of CN51
the compressor
Error status
Option
*1
*2
Adapter for
external input
(PAC-
SC36NA-E)
Adapter for
external out-
put
(PAC-
SC37SA-E)
GB