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A) IGNITION MODULE DIAGNOSTICS
The LED located on the ignition module (see Figure 10) will flash
ON for ¼ second, then OFF for ¼ second during a fault condition.
The pause between fault codes is 3 seconds.
LED Indication
Error Mode
Steady On
Internal Control Failure
2 Flashes
Flame without call for heat
3 Flashes
Ignition Lockout
B) FLAME SENSOR TESTING
The flame current is the current that passes through the flame
from the sensor to the ground. The minimum flame current
necessary to keep the system from lockout is 0.7 micro-amps.
To measure the flame current, connect an analog DC micro-
ammeter to the FC- and FC+ terminals per diagram. The meter
should read 0.7 µA or higher when the burner is running full on.
If the meter reads below zero, the meter leads are reversed.
Disconnect power and reconnect the meter leads for proper
polarity.
C) SPARK ELECTRODE INSPECTION
1. Inspect the spark electrode for possible cracks in the
ceramic insulator. Replace if necessary.
2. Check for proper electrode spark gap. This should
measure 1/8". Re-bend to correct gap or replace
electrode if necessary.
3. Check that the electrode ground rod is located to
center of the burner port as shown in illustration. If
electrode is misaligned, loosen the screws and nuts
holding the electrode and reposition to correct location.
Re-tighten screws and nuts.
D) TROUBLESHOOTING CHART
–24–
Form No. 43539510
May 2020
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