Barnstead 47900 Operation Manual
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Contents
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41The Troubleshooting section is intended to aid in defining and correcting possible serviceproblems. 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.Problem Possible Causes Corrective ActionCycle light does not The furnace is not Reconnect furnace to powerilluminate. connected to power supply. supply.Incorrect power source. Connect to correct powersource.ON and OFF power switch Replace power switch.defective.Defective cycle light. Replace cycle light.Door switch malfunction. Realign or replace furnacedoor safety switch.Furnace does not heat. No power. Check power source andfuses or breakers.Defective electrical hookup. Repair electrical hookup.Thermocouple has oxidized and Replace thermocouple.opened the circuit.Controller malfunction. Replace controller.Heating elements Replace defective elements.burned out.Door switch malfunction. Realign or replace door safetyswitch.Defective OTP relay. Replace relay.Defective solid state relay. Replace relay.Troubleshooting |
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