LAARS IGI-180C-5(N,X) - Service Manual - Manual (Page 25)

Error Faulty Remedy
10 Air Supply Check all vent components for proper connections.
or Exhaust Check that nothing is blocking the flue inlet or exhaust.
Blockage Ensure proper venting materials were used.
Ensure condensation collar was installed correctly.
Verify dip switches are set properly.
11 No Ignition Ensure you have gas to the appliance.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Verify dip switches are set properly.
Disconnect all MSA controls.
Ensure gas line, meter, and/or regulator is sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Ensure igniter is operational.
Check igniter wiring harness for damage.
Remove burner cover and ensure all burners are properly seated.
Remove burner plate and inspect burner surface for condensation or debris.
12 Flame Failure Ensure you have gas to the appliance.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Verify dip switches are set properly.
Ensure flame rod wire is connected.
Check flame rod for carbon build-up.
Ensure gas line, meter, and/or regulator is sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Check power supply for loose connections.
Check power supply for proper voltage and voltage drops.
Disconnect all MSA controls.
Disconnect keypad.
Disconnect and re-connect all wiring harnesses on unit and PC board.
Ensure proper venting material was installed.
Ensure condensation collar was installed properly.
Ensure maximum vertical vent length does not exceed 21 ft. and three 90˚ elbows.
Ensure maximum horizontal vent length does not exceed 41equivalent feet and three
90˚ elbows.
Immediate code 12 is usually a defective gas valve, power supply problem, or defective
fan motor wiring harness.
Remove burner plate and inspect burner surface for condensation or debris.
14 Thermo Fuse Ensure dip switches are set to the proper position.
Ensure high fire and low fire manifold pressure is correct.
Check gas type of unit and ensure it matches gas type being used.
Check heat exchanger for cracks and/or separations.
Check resistance on safety circuit.
Check for improper conversion of product.
Check for restrictions in air flow around unit and vent terminal.
Check for a low flow circulating system that is causing the unit to short cycle.
Check for foreign materials in combustion chamber and/or exhaust piping.
16 Over Check for clogged heat exchanger.
Temperature Check for restrictions in air flow around unit and vent terminal.
Warning Check for a low flow circulating system that is causing the unit to short cycle.
Check for foreign materials in combustion chamber and/or exhaust piping.
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VI - TROUBLESHOOTING
Error Messages