Service manual

16 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

8. HEATING ELEMENT OR BURNER SHUTS-OFF PREMATURELY

9. HEATING ELEMENT OR BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT

THERMOSTAT

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust and/or make-up air

system.

• Refer to Installation Manual (supplied with tumbler) for

exhaust and make-up air requirements.

Gas Models: Insufficient gas supply • Open partially closed gas shut-off valve, or correct low

pressure.

Gas Models: Tumbler not properly equipped for

type of gas used.

• 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.

Gas Models: Improperly adjusted burner flame. • Refer to Adjustment Section for burner flame adjustment.

Gas Models: (Glow-Bar Ignition) Sensor contact

closing.

• Replace sensor.

Cycling off on limit thermostat. • Refer to Paragraph 9.

Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

POSSIBLE CAUSE TO CORRECT

External exhaust system is longer than

recommended or inadequate make-up air.

• Refer to Installation Manual (supplied with tumbler) for

exhaust and make-up air requirements.

Clogged lint screen. • Remove screen and clean. Lint screen and compartment

should be cleaned after every eight hour shift.

Lint in tumbler ducts. • Clean tumbler ducts

Lint in external exhaust system. • Disassemble exhaust system and clean.

High limit thermostat cycling at too low a

temperature.

• Replace thermostat.

Lint door panel not closed properly. • Remove lint door panel, place lint door panel back on

tumbler (ensuring a tight fit) then latch.