Fig. 8—Control Board
A04194
ON
OFF
ON
OFF
ON
OFF
ON
OFF
120 VAC
SW1
HEAT
1
2
OFF OFF
OFF
OFF
ON
ON
ON ON
A
B
C
D
SW2
COOL
1
2
OFF OFF
OFF
OFF
ON
ON
ON ON
A
B
C
D
SW3
ADJ
1
2
OFF OFF
OFF
OFF
ON
ON
ON ON
A
B
C
D
SW4
DELAY
1
2
OFF OFF
OFF
OFF
ON
ON
ON ON
A
B
C
D
SW1
SW2
SW3
SW4
NEUTRALS
HUM
120 VAC
P2
24 V
A
C
C
F1
D6
D7
D8
D9
D10
D11
D12
D14
U1
R21
R20
MO V1
01
R22
KJ
JW1
C2
U2
R23
JW4
LED
RED
C1
JW5
R2
R1
JW6
R3
D20
D1
D3
D04
D02
D13
R13
JW2
JW3
JW7
LED7
GRN
R14
R12
D17
D18
D19
D21
D15
D16
LED4
LED3
LED5
LED7
LED8
LED1
GRN
GRN
GRN
GRN
GRN
GRN
P3
Y
Y/Y2
G
DH
O
W
R
C
HSC 1
1168-83-1
NOTES
1. The Red LED to the right of P-1 will illuminate whenever the limit switch is open.
2. The Green LED below the left end of P-1 will flash when the blower motor is operating.
The LED will flash one time for each 100 RPM.
3. The Green LEDs above Y1, Y/Y2, G, O, and W will illuminate whenever there is a 24V
input from the thermostat.
4. The Green LED above DH will illuminate whenever there is not a 24VAC input applied.
P1
—11—
