O.C. ON
NO
YES
IS
PRESENT
8-2?
O.C. ON
ALARM ON
YES
REPLACE
MEC120
PROGRAMMER
OR
MC120 DEFECTIVE
CHECK BLOWER
SYSTEM
CHECK AIR FLOW
SWITCH AND
CHECK WIRING
IS
BLOWER
ON?
IS
120 VAC
PRESENT
6-2?
FLAME ON
YES
YES
NO
NO
SITUATION #2 SITUATION #3 SITUATION #4
NO HEAT NO HEAT
NO YES
REPLACE FUSE
OR
RESET BREAKER
CHECK
SYSTEM
WIRING
NO YES
REPLACE
MEC120
CORRECT
AMPLIFIER
PIN PROBLEM
I
S FUSE
OK AND CKT
BREAKER
MADE?
NO
LED’s
ON
YES
NO
NO HEAT
IS
120VAC
PRESENT
120VAC
AMP.
OR PRO.
PINS
ENGAGED
1-2 OR
OR
PROGRAMMER
PINS
7-2?
REMOVE
SCANNER
REPLACE
AMPLIFIER
NO
YES
NO
SEE
SITUATION #1
REPLACE
AMPLIFIER
SEE
SITUATION #1
PROGRAMMER OR
DEFECTIVE
MC120
REPLACE
SCANNER
SEE
SITUATION #1
NO
YES
NO
YES
CHECK BURNER
WIRING AND FUEL
VALVES. FLAME SHOULD
NOT BE THERE.
IS
FLAME LED
ON?
IS
THIS A UV
SYSTEM?
IS
FLAME LED
ON?
YES
IS
FLAME LED
ON?
IS
FLAME PRESENT
IN BURNER?
NO
TROUBLESHOOTING TIPS
1. Verify that there is a solid earth ground wire brought to the panel that the Fireye base is mounted to.
2. In a rectification system, verify that terminal S1 is solidly earth grounded, and confirm that the flame rod is aligned so it doesn’t droop
near the ignition spark.
3. Confirm that there is no measurable voltage present between the ground screw and terminal 2 (neutral).
4. Confirm that the 120 volt AC supply has its neutral leg earth grounded at the supply, (floating isolation transformers can cause prob-
lems).
5. Confirm that the ignition transformer’s secondary winding is solidly earth grounded. The grounding method is usually through the
transformer case. Dirt, paint, loose mounting hardware, etc., can all be factors.
6. There may be a problem with transients in the main power supply. If you think this may be the problem, you may want to run a ground
wire directly from the pilot assembly back to the electrical panel where the Fireye control is mounted.
M-Series Fuse 2AG 8
amps.
Fireye Part Number: 23-176
or
PROGRAMMER OR
DEFECTIVE
MEC120
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