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POSSIBLE CAUSE
1. No Input power.
2. Wiring disconnected
3. One or more wiring recep-
tacles disconnected from
control.
4. LED burned out.
5. Defective transformer.
6. Transformer wiring problem.
REMEDY
1. Apply Power
2. Check all wiring
3. Reconnect plugs on control.
Confirm all are fully seated.
4. Replace display board.
5. Replace transformer.
6. Repair transformer wiring.
NO INCOMING LINE VOLTAGE OR 24 VOLT
Line LED & 24 VAC LED Off
NOTE:
The transformer is of Class II variety and has an internal non-
replaceable fuse. If blown, a problem may exist with the control
which is affecting the transformer. In such cases, it is recom-
mended the control should be replaced as well.
POSSIBLE CAUSE
1. Broken ignitor element.
2. Ignitor unplugged.
3. Insufficient ignitor current
draw.
REMEDY
1. Replace ignitor element.
2. Plug in ignitor.
3. Monitor ignitor current draw.
See note below.
IGNITOR LOCKOUT
Ignitor Element LED Flashing
NOTE:
The ignitor current is monitored by pressing the blue button to
the left of the LEDs during the ignitor warm-up period or when
the ignitor element LED is illuminated. The 3-segment LED
display will show the actual ignitor current draw. The expected
ignitor current draw is from 2.5 to 4.5 amps.
LINE
K1
COMB
BLOWER
K5
IGNITER
ELEMENT
24
VAC
ECO/VENT
SWITCH
SWITCH
PRESSURE
GAS
VALVE
RLY 1
GAS
VALVE
RLY 2
GAS
VALVE
CONTROL
HEALTH
WATER
TEMPERATURE
K1
K5
K3
K4
K4K3
CONTROL
ELECTRONICS
LINE
K1
COMB
BLOWER
K5
IGNITER
ELEMENT
24
VAC
ECO/VENT
SWITCH
SWITCH
PRESSURE
GAS
VALVE
RLY 1
GAS
VALVE
RLY 2
GAS
VALVE
CONTROL
HEALTH
WATER
TEMPERATURE
K1
K5
K3
K4
K4K3
CONTROL
ELECTRONICS