Service manual

18 M411433

Section 3 Troubleshooting

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be

reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

13. BURNERS NOT BURNING PROPERLY - GAS MODELS

14. CYLINDER DOOR OPENS DURING OPERATION

15. TUMBLER RUNS BUT NO STEAM TO COILS - STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Burner air shutters incorrectly adjusted. • Refer to Adjustment Section for proper flame adjustment.

Dirt in burners. • Disassemble burners and blow out the dirt.

Gas pressure too high. • Check serial plate on back of the tumbler for correct gas

pressure.

Incorrect orifices. • Tumbler is equipped for type of gas specified on serial

plate. If orifices are different from that specified on serial

plate, obtain and install proper orifices.

Restricted or blocked exhaust duct. • Disassemble and clean exhaust system.

Airflow switch not functioning properly. • Check adjustment and replace airflow switch if necessary.

POSSIBLE CAUSE TO CORRECT

Door strike improperly adjusted. • Refer to Adjustment Section for door strike adjustment.

Tumbler improperly leveled. • Refer to Adjustment Section for leveling leg adjustment.

POSSIBLE CAUSE TO CORRECT

Valves closed. • Check all valves in supply and return lines, make sure

they are open.

Blocked steam trap. • Remove trap and clean. Replace if inoperative.

Inoperative solenoid valve. • Check operation of solenoid valve.

Incorrect installation of check valve. • Check for inlet and outlet markings on check valve, and

invert is necessary.

Clogged strainer. • Remove strainer and clean.

Inoperative timer or thermostat. • Test timer or thermostat, replace if inoperative.