Barnstead F62730, Operation Manual

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PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION
Furnace doesn’t stop heating Door switch is malfunctioning. Re-align or replace door
when the door is opened. safety switch.
Mechanized relay is Replace relay.
malfunctioning.
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 International.
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.
T
ROUBLESHOOTING