Specifications

CONTROLLER (Feb. 2009)
CNTR-79
CONTROLLER
DATA U4
4. SYSTEM COMPONENT
CN51
X
Y
L1
L2
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 Silent mode
(Night mode) (CN3D)
4-2-2. Input
Y-, R2-Series
5
4
3
*2. Optional part : PAC-715AD or field supply.
For details, refer to "Table 4-1".
*2. Optional part : PAC-715AD or field supply.
*2. Optional part : PAC-715AD or field supply.
*2. Optional part : PAC-715AD or field supply.
(4) Snow sensor (CN3S)
X : Silent 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) Silent mode (Night 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 cannot 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
Silent mode
(Night 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) System changeover (CN3N)
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-725AD 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.
4-2. Outdoor unit input/output connector (Y-, R2-, S-Series)