Carlisle BGK AutoCure 6000-2216, Assembly And Operating Manual

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7. Troubleshooting Guide
Heater Power Problems
Problem
Heater lamps come on immediately when disconnect is closed.
Possible Cause and Corrective Action
•
With power OFF, measure the resistance from the lamp wires to ground. The
measurement should be more than 100 K ohms. If it is less than 100 K, check the lamp wiring
and heater head for shorts to ground. Check for a bad firing circuit board or a shorted SCR
by: exchanging the firing circuit board with one from a known good control. Does the problem
follow the firing circuit board or does it stay with the SCR – replace the defective component.
•
Contactor held closed – failed ON. Replace the contactor.
Problem
Heater lamps do not come on.
Possible Cause and Corrective Action
•
Is the Power On/Off button illuminated, is the temperature controller on? - Check that
incoming line power is present; transformer fuses, primary and secondary are good.
•
Do the contactors energize when the Cycle Start button is pressed? – Check for loose wires
associated with the contactors,change the temperature controller.
•
Check that the set point (bottom display) is higher than the process temperature (top
display).
•
Are the line fuses in front of the contactors good – check voltage on the load side of the
fuses or remove the fuses and check with an ohmmeter.
•
Is the green LED on the firing circuit lit? – Check that the firing circuit has 24 vac, with an
ammeter check that the 4-20ma input signal is present from the temperature
controller. If the 4-20ma signal is not present, see the section “No Output Signal
from Temperature Controller”.
•
Do any of the zones function? – If the above points have been checked, confirm that
there is a complete circuit through the lamps and all wiring is tight – change the
SCR.
•
Are all zones dead? – Zone A should function regardless of the zone switch setting, there is
only one firing circuit for all zones - change the firing circuit