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Figure 7: Air Conditioning Schematic 543-0010-01, 943-0010-01
Solid Line shows field
installed wiring.
Dashed line shows thermostat
demand wiring in system without
HTCO, LPCO.
Figure 8: Heat Pump Schematic 543-0012-00, 943-0012-00
Solid Line shows field
installed wiring.
Dashed line shows thermostat
demand wiring in system without
HTCO, LPCO and Defrost.
WARNING
Comfort Alert
Diagnostics Module
Y
543-0010-00
C
HTCO High Temperature Cut Out Switch
HPCO High Pressure Cutout Switch
LPCO Low Pressure Cut Out Switch
Comfort Alert
Diagnostics Module
Y
543-0012-00
R
C
HTCO High Temperature Cut Out Switch
HPCO High Pressure Cutout Switch
LPCO Low Pressure Cut Out Switch
Hazardous voltage inside air conditioning system. Discon-
nect power before installing or servicing module. Module
must be installed and serviced only by qualified personnel.
LPCO
HPCO
C
Indoor Unit
Terminal Block
C
Single Stage Indoor Thermostat
Schematic Abbreviation Description
CC Compressor Contactor
LPCO
HPCO
C
Indoor Unit
Terminal Block
C
Single Stage Indoor Thermostat
Schematic Abbreviation Description
CC Compressor Contactor
ECB Electronic Control Board
( Defrost Board )
6
HTCO
R
Y1
R
Y1
HTCO
ECB
R
Y1
R
Y1
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