Barnstead FB1300, Operation And Repair Manual And Parts List

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Problem Possible Causes Corrective Action
The furnace does not heat No power. Check power source and fuses or
(CYCLE light does not illuminate). breakers.
Defective electrical hookup. Repair electrical hookup.
Thermocouple has oxidized and Replace thermocouple.
opened the circuit. (Open thermocouple
is indicated on the display as a
temperature of 0-5 degrees).
Controller malfunction. Replace controller.
Door switches malfunction. Re-align or replace door safety switches.
Defective solid state relay. Replace output relay.
Door switches do not cut Door switches are not functioning. Re-align or replace door switches.
power to heating elements.
Slow heatup. Low line voltage. Install line of sufficient size and proper
voltage. (Isolate furnace from other
electrical loads.)
Heavy load in chamber. Lighten load in chamber to allow
heat to circulate.
Wrong heating element. Install proper element.
Repeated element burnout. Overheating furnace. Keep furnace under maximum
temperature.
Heating harmful materials. Enclose material in container. Clean up
spills in and on chamber. Ventilate
chamber by opening door slightly when
heating known harmful reagents.
Contamination present from Replace insulation material.
pervious burnout.
Inaccurate temperature Oxidized or contaminated Replace thermocouple.
readout. thermocouple.
Poor thermocouple connection. Tighten connections.
Improper loading procedures. Use proper loading procedures.
Poor ventilation of base. Clear area around furnace base.
Thermocouple connections Reconnect thermocouple correctly.
reversed. (Indicated by
downscaling or temperature on
display.)
Controller malfunction. Replace controller.
15
The Troubleshooting section is intended to aid in defining and correcting possible furnace
problems. When using the chart, select the problem category that resembles the malfunc-
tion. Then proceed to the possible causes category and take necessary corrective action.
Troubleshooting