LG Multi V Installation Manual page 28

LOW VOLTAGE COMMUNICATIONS
Control Circuit Board Diagrams Legend.
Table 7 lists the control circuit board diagrams legend.
Descriptor
CN
CN-CC
CN-COM
CN-Display
CN-D/PUMP
CN-EEV
CN-FLOAT
CN-L
CN-N
CN-MOTOR 1
CN-MOTOR 2
CN-OPTION
CN-PIPE/IN
CN-PIPE/OUT
CN-POWER
CN-REMO
CN-ROOM
CN-ZONE
EARTH
RW-VM
1(L1)
2(N)
3(A)
4(B)
28
Table 7: Control Circuit Board Diagrams Legend
Socket Connection
Auxillary Controller Connection (Optional; i.e., Dry Contact)
Indoor Unit Communications Bus (3[A] and 4[B])
Not Used
Condensate Pump Power
Electronic Expansion Valve
Condensate Drain Pan Overflow Protection Switch (Normally Open)
Power Wire Connection (+)
Power Wire Connection (-)
Indoor Unit Fan Motor 1
Indoor Unit Fan Motor 2
Indoor Unit Option Card Socket
Liquid Pipe Temperature Thermistor
Vapor Pipe Temperature Thermistor
Line Voltage Power (208 V, 60 Hz, single-phase)
Wall-Mounted Zone Controller
Unit-Mounted Return Air Thermistor
Not Used
Ground Required
Dual Indoor Unit Fan Board Communications Link
Terminal Block Line Voltage (+)
Terminal Block Line Voltage (-)
Indoor Unit Communications Bus ("A" Conductor)
Indoor Unit Communications Bus ("B" Conductor)
Terminal Block Ground
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