Page 3
BLOWER OFF
DELAY JUMPER
PUSH BUTTON
LED
TERMINAL DESIGNATIONS
HUM
LINE
XFMR
EAC
COOL
HEAT
PARK
CONT
NEUTRALS
Humidifier (120VAC)
Input (120VAC)
Transformer (120VAC)
Indoor Air Qality Accessory Air Cleaner (120VAC)
Blower - Cooling Speed (120VAC)
Blower - Heating Speed (120VAC)
Dead terminals to park alternate spd taps
Continuous blower
Neutral terminals (120VAC)
12
11
10
9
8
7
6
5
4
3
2
1
FIGURE 2
TABLE 2
12-Pin Terminal Designations
PIN # FUNCTION
1 High Limit Output
2 Flame Sense
3 24V Line
4 Not Used
5 Rollout Switch Out
6 24V Neutral
7 High Limit Input
8 Ground
9 Gas Valve Common
10 Pressure Switch In
11 Rollout Switch In
12 Gas Valve Out
TABLE 3
4-Pin Terminal Designation
PIN # FUNCTION
1 Combustion Air Inducer Line
2 Ignitor Line
3 Combustion Air Inducer Neutral
4 Ignitor Neutral
TABLE 4
DIAGNOSTIC CODES
LED Status DESCRIPTION
LED O
No power to control or
control harware fault
detected.
LED On Normal operation.
1 Flash
Flame present with gas vavle
de-energized.
2 Flashes
Pressure switch closed with
combustion air inducer de-
energized.
3 Flashes
Pressure switch open with
combustion air inducer
energized.
4 Flahses Primary limit switch open.
5 Flashes Rollout switch open.
6 Flashes
Pressure switch cycle
lockout.
7 Flashes Lockout, burners fail to light.
8 Flashes
Lockout, buners lost ame
too many times.
9 Flashes
Line voltage polarity
incorrect.
Note - This control is equipped with a push button switch
for diagnostic code recall. The control stores the last 5
fault codes in non-volatile memory. The most recent fault
code is ashed rst, the oldest fault code is ashed last.
There is a 2 second pause between codes. When the
push button switch is pressed for less than 5 seconds, the
control will ash the stored fault codes when the switch is
released. The fault code history may be cleared by press-
ing the push button switch for more than 5 seconds.
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