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1. Check status of electronic burner control diag-
nostic indicator LED.
A. LED On = electronic burner control fault.
B. 1 flash = air flow fault.
C. 2 flashes = flame with no call for heat.
D. 3 flashes = ignition lockout.
2. Confirm that both main manual shut off valve and
manual gas knob on combination gas valve are in
the ON position. Make sure that the thermostat, op-
erating controls and safety controls are calling for
heat. Check associated wiring and connectors be-
fore replacing a component. Whenever the burner
fails to light during the 7 second ignition trial, or if the
flame is lost during the burner run cycle and not re-
established within 37 seconds (30 sec. pre-purge),
the electronic burner control will shut OFF the com-
bination gas valve and lock out the burner. To reset,
set the operating control to OFF or set the thermo-
stat below set point for at least 30 seconds.
3. Confirm that:
A. Burner is properly grounded (Green wire
to ground).
B. Line voltage is present between wires
L1(Black) and L2(White). If not, check line
power source.
C. Line voltage is present between L1
(Black) and Ground (Green).
D. There is no voltage present between L2
(White) and Ground (Green).
4. Confirm that 24V are present at:
A. Transformer, 24V secondary side (Yellow
wires). If not present, replace transformer.
B. R terminal on burner control and Ground.
C. First Blue wire in electrical box labeled
“T”(thermostat) and Ground, 2nd Blue wire
in electrical box labeled “T” (thermostat) and
Ground. If power is only present at one Blue
wire, check thermostat and wiring.
D. TH terminal on electronic burner control
and Ground. If no power is present at TH
terminal, check thermostat and wiring.
5. Blower motor should now be ON. If ON, proceed
to step 7. If not ON:
A. Confirm that line power is present at IND
wires at the electronic burner control.
NOTE: IND wires exit the back side of the electronic
burner control and one IND wire goes to the line
power outside of the blower motor (White and Blue
wires for 115V, White and Black for 230V).
B. Confirm that line power neutral (L2,
White) is connected to motor neutral wires
(Orange and Black wires for 115V, Orange
and Blue wires for 230V). If line power is
being delivered to the blower motor and it is
not running, replace the motor.
6. With blower motor running, confirm that 24V
power is present at PSW terminal on the electronic
burner control and Ground. If power is not present,
check wires and wire connections of the internal
motor interlock switch (2 red wires exiting motor). If
the blower motor is running and the internal blower
motor interlock switch is open, replace the blower
motor.
7. After 30 second blower motor pre-purge, confirm
24V power at V1 terminal on electronic burner con-
trol and Ground. If power is not present, replace
electronic burner control. NOTE: After the pre-
purge period, the controller will simultaneously en-
ergize the gas valve and send power to the spark
rod, causing an ignition spark at the end of the rod.
CAUTION: Spark generating circuit is HIGH VOLT-
AGE! If an ignition spark is not present at the tip of
the rod, turn the power supply OFF. Inspect ignition
wire/connectors, spark rod & positioning, spark rod
gap and spark rod ceramic insulator. Adjust, repair
or replace as necessary. If an ignition spark is still
not present, perform a spark test on the electronic
burner control per the manufacturer’s instructions. If
it fails, replace electronic burner control.
8. Once ignition spark is present, main flame should
be present. If not present:
A. Confirm that there is no air in gas line. If
so, purge air from gas line.
B. Confirm that 24V power is being deliv-
ered to the gas valve (V1 and V2 on elec-
tronic burner control).
C. Check for adequate flame current signal
strength with an electrical meter (Refer to the
electronic burner control manufacturers specifica-
tion sheet that is supplied with the burner as noted
in Section VIII, sub-section 6).
9. Once main flame is established and flame current
signal strength is good, proceed to “Part 2 Service,
Section VIII Burner set-up/ adjustment” to finalize
the burner set-up.
NOTE: ELECTRICAL AND FLAME CHECKS MUST BE MADE IN THE ORDER LISTED.
