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Door switch does not cut
Door switch is not functioning.
Re-align or replace door
safety switch.
Repeated element burnout.
Heating harmful materials.
Clean up spills in and on chamber.
Ventilate chamber by leaving
top vent slightly open when
heating known harmful reagents.
Wrong element.
Install proper element.
Oxidized thermocouple.
Replace thermocouple.
Contamination present from
Clean and/or replace
previous burnout.
insulation material.
Wired improperly.
Check wiring diagram for correct
wiring of your furnace.
Inaccurate temperature readout.
Oxidized or contaminated
Replace thermocouple.
thermocouple.
Poor thermocouple connection.
Tighten connections.
Solid state relay malfunction.
Replace solid state relay.
Improper loading procedures.
Use proper loading procedures.
Poor ventilation of base or
Clear area around furnace base
cooling fan failed.
or replace cooling fan.
Control out of calibration.
Contact Barnstead/Thermolyne.
Thermocouple connections
Reconnect thermocouple
reversed.
correctly.
P.I.D. values invalid.
Re-tune control.
Control malfunction.
Verify and correct all parameter
and configuration values.
If malfunction persists, replace
control.
WARNING
T
ROUBLESHOOTING
