Chart 5.1
Troubleshooting Guide
5.0
Maintenance
- GTD Series Installation, Operation, Maintenance and Parts Manual
Troubleshooting Guide
NOTE:
Contact appliance manufacturer prior to replacing parts other than those specified in this manual.
37
Symptom
Possible Cause
Corrective Action
Thermostat closed, fan doesn’t
operate.
• Blown fuse.
• Faulty thermostat.
• Loose or disconnected wire.
• Faulty fan, circuit board or pressure switch.
• Replace.
• Replace.
• Repair as required.
• Lubricate, repair or replace.
Thermostat closed. Fan operates.
Electrode does not spark.
• Loose or disconnected wire.
• Box lid or gasket not in place.
• Plugged pressure switch lines.
• Faulty electrode set.
• Faulty pressure switch.
• Faulty circuit control.
• Repair as required.
• Put in place.
• Clean as necessary.
• Replace.
• Replace only. Do not adjust.
• Replace circuit control.
Thermostat closed. Fan and
electrode operate. After 10
seconds electrode stops sparking.
No ignition.
• Closed gas supply.
• Dirty or restricted orifice.
• Faulty valve or disconnected valve wire.
• Open all gas connections.
• Remove and clean with soft object.
• Repair or replace.
Thermostat closed. Fan and
electrode operate. Ignition occurs.
Burner cycles off and will not
recycle.
• No electrical ground.
• Faulty circuit control.
• Low gas pressure.
• Poor circuit control connection.
• Connect electrical ground to junction box.
• Replace.
• Provide required gas pressure.
• Repair or replace.
Thermostat closed. Fan and
electrode operate. Ignition occurs.
Burner cycles off. Burner cycles
on.
• Low gas pressure.
• Baffle improperly positioned.
• Faulty pressure switch.
• Restricted flue.
• Provide required gas pressure.
• Reposition baffle.
• Replace.
• Remove foreign matter.
Loss of heater efficiency.
• Low gas pressure.
• Dirty or restricted orifice.
• Foreign matter inside burner.
• Unit cycles on and off.
• Reflector is dirty or not in place.
• Clogged fan blower.
• Provide required gas pressure.
• Remove. Clean with a soft object.
• Clean as necessary.
• Check previous symptom.
• Clean with aluminum cleaner and soft cloth.
• Clean.
Radiant tube leaking burnt gases.
• Loose tube connections.
• Holes or cracks in radiant tubes.
• Ensure that tubes are fully connected
and clamped properly.
• Replace.
Condensation.
• Stack length is too long.
• Light gauge flue stack used.
• Contaminated combustion air.
• Shorten stack length.
• Minimum of 26 ga. flue pipe required.
• Provide fresh air inlet duct.
Tube bowing.
• Insufficient combustion air.
• Over fired.
• Contaminated combustion air.
• Heater unable to expand properly.
• Baffle installed incorrectly.
• Provide 440 sq. mm. of free air per kW of input.
• Check gas pressure and orifice size.
• Provide fresh air inlet duct.
• Remount with flexible inlet or flue pipe.
• Move to furthest tube section from burner.
Tube corroding.
• Contaminated combustion air.
• Provide fresh air inlet duct.
Visual inspection of burner
operation not possible.
• Dirty or sooted sight glass.
• Unit mounted upside-down.
• Remove, clean or replace.
• Mount correctly.
Stack sooting.
• Insufficient combustion air.
• Improper gas.
• Dirty fan or blockage.
• Provide 440 sq. mm. of free air per kW of input.
• Correct with proper gas input (or clean).
• Clean and/or remove blockage.
Odor or fumes in space
(normal during first firing and
will subside after initial burn off,
approximately 20 minutes).
• Vaporized solvents decomposing when
contacting radiant tubes.
• Evaporation of oils, solvents at floor level.
• Fork lifts.
• Loose tube / flue connections.
• Provide proper ventilation.
• Provide proper ventilation.
• Tighten tube clamps to 30-44 Nm.
• Seal flue pipes.
