Connection Diagrams - Carrier 38MAQB12-1 Service Manual

CONNECTION DIAGRAMS

L
N
Indoor Unit
Power Supply
115-1-60
9K and 12K 115V Indoor Unit
L1 L2
Indoor
Indoor Unit
Signal
Power Supply
High
208/230-1-60
Voltage
9K to 30K 230V Indoor Unit
Notes:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.
CONNECTING CABLE
OUTDOOR TO INDOOR
GND
S
Indoor
Ground
Signal
High
Voltage
Fig. 5 – 9K (115V), 12K (115V)
CONNECTING CABLE
OUTDOOR TO INDOOR
GND
S
Ground
Fig. 6 – 9K (208/230V), 12K (208/230V), 18K, 24K, 30K
115-1-60
FIELD POWER SUPPLY
GND
L S
N
Indoor
Power to
Signal
Indoor Unit
High
115-1-60
Voltage
9K and 12K 115V Outdoor Unit
208/230-1-60
FIELD POWER SUPPLY
L1 L2 S
Power to
Indoor
Indoor Unit
Signal
High
208/230-1-60
Voltage
9K to 30K 230V Outdoor Unit
9
L N
Main
Power Supply
115-1-60
GND
L1 L2
Main
Power Supply
208/230-1-60