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Controller
MEE15K022
4. System component
YKB/YLM 2nd
4-2. Outdoor unit input/output connector
CN51
X
Y
L
1
L
2
Lamp power source
Distant control
board
Relay circuit
Adapter *1
Outdoor unit
control board
Preparations
in the field
L1 : Outdoor unit error display lamp
L2 : Compressor operation lamp (compressor running state)
X, Y : Relay (coil =<0.9W : 12VDC)
Maximum cable
length is 10m
• State (CN51)
4-2-1. Output
(1) Step demand and Low noise mode (CN3D)
4-2-2. Input
Y
, R2 series
5
4
3
*2. Optional part : PAC-SC36NA-E or field supply.
For details, refer to "Table 4-1-2."
*2. Optional part : PAC-SC36NA-E or field supply.
*2. Optional part : PAC-SC36NA-E or field supply.
*2. Optional part : PAC-SC36NA-E or field supply.
(4) Snow sensor (CN3S)
X : Low noise mode or demand
Y : Demand
X,Y : Relay
X : Relay
Snow sensor : The outdoor fan runs when X is closed
in stop mode or thermostat mode.
X
CN3S
Preparations
in the field
Preparations
in the field
Maximum cable
length is 10m
Adapter *2
Outdoor unit
control board
2
3
1
X
Y
OFF
Cooling
ON
Heating
Normal
Y
OFF
ON
X
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum appicable load =< 1mA at DC
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
(2) Low noise mode (CN3D + DipSW4-4 OFF)
X
CN3D
Preparations
in the field
Maximum cable
length is 10m
Adapter *2
Outdoor unit
control board
2
3
1
X : Relay
: 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.
Contact rating voltage >= 15VDC
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
Low noise mode
Relay circuit
Y
X
CN3D
Preparations
in the field
Maximum cable
length is 10m
Adapter *2
Outdoor unit
control board
3
2
1
(3) Autochangeover (CN3N) (R2 excluded)
X : Cooling / Heating
Y : Validity / Invalidity of X
X,Y : Relay
CN3N
X
Y
Relay circuit
Relay circuit
Relay circuit
Adapter *2
Outdoor unit
control board
Maximum cable
length is 10m
1
2
3
*1. Optional part : PAC-SC37SA-E or field supply.
Caution:
3.The electric strength between accessible parts and control circuit should have 2750V or more.
1.Wiring should be covered by insulation tube with supplementary insulation.
2.Use relays or switches with IEC or equivalent standard.
(5) Energy-saving mode (CN3K)
*2. Optional part : PAC-SC36NA-E or field supply
.
X : Energy-saving mode command
X : Relay
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum appicable load =< 1mA at DC
X
CN3K
Preparations
in the field
Maximum cable
length is 10m
Outdoor unit
control board
3
2
1
Relay circuit
External input
adapter *2
