Mitsubishi Electric City Multi PFAV-P500VMH-E, Service Handbook

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[
II
Restrictions ]
- 21 -
HWE07150 GB
(6) Various types of control using input-output signal connector on the outdoor unit (various connection options)
*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.
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 system.
DEMAND (level) CN3D
*2
*2. For details, refer to 1) through 4) 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
outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.
*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).
Forces the outdoor unit to perform a fan operation by receiving sig-
nals from the snow sensor.
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
CN51 Adapter for
external out-
put
(PAC-
SC37SA-E)
Error status
Low-noise mod 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]
and 63HS1>35kg/cm
2
TH7<0°C[32°F]
and 63LS<3.9kg/cm
2