10
For oil flames (Photocell):
✓
Detector location & wiring
✓
Smoky flame or poorly adjusted air shutter
✓
Faulty Photocell
✓
Temperature over 165
o
F (74
o
C) at photocell
For gas flames (Flame Rod):
✓
Ignition interference (A flame signal current difference with the ignition both on
and off greater than 0.5
A indicates the presence of ignition interference)
✓
Insufficient ground (must be at least 4 times the detector area)
✓
Flame lifting off burner head (ground), or not continuously in contact with the
flame rod
✓
Temperature in excess of 600
o
F (316
o
C) at the flame electrode insulator
causing short to ground.
