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Outdoor Unit Typical Wiring Diagram
Outdoor
R
Compressor
Crankcase Heater
L1
208-230/60/1
L2
Crankcaser
Heater
Equipment
Ground
1. Operate the heat pump for a period of at least 15 minutes to
allow for pressures and temperatures to stabilize.
LT BU
R
Fan
PR
BK
OR
Y
BU
BK
C
S
Diagnostic
Module
Ground
Lug
Crankcase
Thermostat
Defrost
Thermostat
Compressor
BK
Compressor
Contactor
Fan
Defrost Control
Crankcase
H
C
Thermostat
Dual
Capacitor
Line Voltage Factory Installed
Line Voltage Field Installed
24 Volt Factory Installed
Class II Voltage Field Installed
Complete Installation
Dual Capacitor
F C H
BK
O-OUT
LO-PS
DF
Common
Y1 OUT
HI-PS
Y
Reversing Valve
Low Pressure
Switch
Defrost Switch
C
S
R
BU
Compressor
Diagnostic
Contactor
Module
L Y2
R
Y1
C
High Pressure
Y
Switch
R
R
Y
LT BU
OR
BK
F
Outdoor Fan
Motor
PR
2. If heat pump does not appear to be functioning correctly,
have heat pump checked by a person certified by the EPA to
handle refrigerant.
Thermostat
C R
O
W1
Y1
Y2
Fan
W1
W1
L
C
C
24V
L
L
R
R
O
O
Y1
Y1
Defrost
Control
L2
208-230/60/1
L1
Ground
Thermostat
Defrost Control
C
R W1 O Y1 Y2
Fan
L1
O-OUT
W1
L
C
LO-PS
24V
L
DF
R
Common
O
Y1 OUT
Y1
HI-PS
LO-PS
HI-PS
Low Pressure
High Pressure
Switch
Switch
11
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