• Faulty CAD cell or seeing light before trial for ignition.
• Coil wire on terminals #1 & 2 or #1 & 8 reversed.
• Open coil circuit, terminals #2 & 8.
• Open coil circuit, terminal #1 (530 SE only).
• Open coil circuit, terminal #1 (483 SE only) will cause burner
to cycle normally, but burner will lockout.
• Defective 42-52 Vac supply - Terminals #3 & 7.
• Defective control box / Replace.
Burner Continues to Purge and Lightoff with
Immediate Flame Dropout. (530 SE Only)
• Metal yoke for coil missing.
• Coil wire #2 & 8 reversed.
• Low resistance of coil holding circuit, terminals #1 & 2,
(1350 ohms ± 10%).
Burner Locks Out After Trial For Ignition
• Low resistance or no contact on starting circuit of coil,
terminals #2 & 8. (1.3 ohm ± 10%)
• No oil supply - tank empty, valve closed, dirty filter,
damaged supply lines.
• Defective or dirty oil valve stem, nozzle or pump strainer.
• Broken pump drive key, defective pump, no oil pressure.
• Ignition electrodes shorted, cracked porcelain.
• Burner motor not up to speed.
• Excessive draft over fire.
• Defective control box / Replace.
Burner Fires-Cycles On & Off
In Quick Succession - (483SE Only)
• Metal yoke for coil missing.
• Low resistance or short in holding circuit of coil,
terminal #1 & 2.
• Coil wires on terminals #2 & 8 reversed.
Thermostat is calling for heat
Burner is not running
Reset Control Box
Burner Does Not StartBurner Starts
Test for 120Vac Supply at sub-base between L(P) & N
or terminals #3 & 5
120 Vac No Voltage
• Check system fuse, ensure service switch is ON.
• Verify all control limits are closed.
• If using switching relay - verify 24Vac at T-T.
Turn off power supply - Remove control box and jumper
terminals #5 & 6. Restore power.
Motor Runs Motor Does Not Run
• Verify electrical connections.
• Check for seized pump, motor, or fan against housing.
• Defective motor capacitor.
• Thermal overload (Hot motor).
• Verify reduced voltage (42-52 Vac) between terminals #3 & 7.
• Ensure good contact between control box spades
and sub-base terminals.
• Defective control box / Replace.
Burner stays in Pre-purge
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