•
Wiring for 1H and 1C thermostat
R
L G
B W
E
C
Y1
DH
W1 W2
R
B W D L
C Y1 Y2
INDOOR UNIT
OUTDOOR UNIT
W
Y
G
C
R
THERMOSTAT
LED DISPLAY
The control displays unit status as well as any
active fault codes on the LED display. If the unit
is functioning normally,the LED display
current temperature setpoint.When a fault code
is active,the display will flash the active fault
code.Please refer to the fault code table located
in the troubleshooting,section of the Service
manual for detailed fault code information.
This is the least preferred method of control
wiring and should only be used for emergency
situations. Full comfort capacity may not be
achieved using this method.
Control Logic
Outdoor unit Connector
R
24V power Connection
C
Common
Connector
Purpose
Y1
B
W
D
L
Low Cooling
Heat Cooling
Heating Reversing Valve
Heating control
Defrost control
System Fault Signal
Y2