Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 4, Page 43
Troubleshooting
Continued
Chart No. 4 - Burner ignites and burns
steadily until the system goes into lockout.
NOTE:
If the flame goes
out during this test and the
burner continues to operate,
go to Chart No. 5.
1. Remove cad cell wires from the ignition controller.
2. Start the burner.
3.
Jumper F-F terminals on the ignition controller.
Does ignition
controller
lockout?
Replace
ignition
controller.
Measure resistance across cell leads (F-F
terminals on the ignition controller).
Is resistance
zero?
Is resistance
greater than
1500 ohms?
Is the over fire
draft correct?
Is resistance
greater than
1500 ohms?
Is resistance
greater than
1500 ohms?
Is the CO2
correct?
Correct
short
circuit.
Cad cell
and
ignition
controller
are OK.
Open transformer
and clean cell face
and seat firmly into
holder.
Adjust for
proper CO2.
Replace the cad cell.
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Adjust barometric
pressure.