Table of Contents
Advertisement
TROUBLE SHOOTING CHART
3398
Thermostat is calling for heat
Burner is not running
Reset Control Box
Burner Starts
Burner Does Not Start
Test for 120Vac Supply at sub-base between L(P) & N
or terminals #3 & 5
120 Vac
• 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
• 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
• 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.
No Voltage
Motor Does Not Run
GB
11
Advertisement
Table of Contents
