4-2.Outdoor Unit Input/Output Connector - Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book

4. System component
4-2. Outdoor unit input/output connector
1.Wiring should be covered by insulation tube with supplementary insulation.
Caution: 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.
4-2-1. Output
• State (CN51)
Distant control
Relay circuit
board
L
1
L
2
Preparations
in the field
4-2-2. Input
Y series
(1) Step demand and Low noise mode (CN3D)
For details, refer to "Table 4-1-1".
Adapter *2
Relay circuit
X
Y
Preparations
in the field
Maximum cable
length is 10m
X : Low noise mode or demand
Y : Demand
X,Y : Relay
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum appicable load =< 1mA at DC
*2. Optional part : PAC-SC36NA-E or field supply.
(3) Autochangeover (CN3N)
Relay circuit
Adapter *2
X
Y
Preparations
Maximum cable
in the field
length is 10m
X : Cooling / Heating
Y : Validity / Invalidity of X
X,Y : Relay
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
*2. Optional part : PAC-SC36NA-E or field supply.
OFF
OFF
Y
ON Cooling
Adapter *1
Outdoor unit
control board
X
Y
CN51
X Y
5
4
3
Maximum cable
length is 10m
Outdoor unit
control board
CN3D
1
2
3
Outdoor unit
control board
CN3N
1
2
3
X
ON
Normal
Heating
CONTROLLER
L1 : Outdoor unit error display lamp
L2 : Compressor operation lamp (compressor running state)
X, Y : Relay (coil =<0.9W : 12VDC)
*1. Optional part : PAC-SC37SA-E or field supply.
(2) Low noise mode (CN3D + DipSW4-4 OFF)
Relay circuit
Adapter *2
1
X
2
3
Preparations
in the field
Maximum cable
length is 10m
X : Relay Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
*2. Optional part : PAC-SC36NA-E or field supply.
Low noise mode : The sound pressure level is reduced by controlling
the maximum fan frequency and compressor frequency.
-Note-
The sound pressure level can not be reduced, when neither
the fan frequency nor the compressor frequency are maximum.
(4) Snow sensor (CN3S)
Relay circuit Adapter *2
1
X
2
3
Preparations
in the field
Maximum cable
length is 10m
X : Relay
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
*2. Optional part : PAC-SC36NA-E or field supply.
Snow sensor : The outdoor fan runs when X is closed
in stop mode or thermostat mode.
C7-R Rev.
Outdoor unit
control board
CN3D
Outdoor unit
control board
CN3S
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