Watlow MINICHEF 2000 Manual de usuario Pagina 36

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Troubleshooting Chart
Hardware & Software Setup Guide Watlow MINICHEF 2000 35
• Refer to sensor wiring instructions.
• Refer to controller specifications.
• System may need to cool down.
• Evaluate the system high-tempera-
ture limiting device.
• Over-range Error has occurred on
channel 1.
• Controller measures a temperature
above the allowable operating range.
• Temperature sensor lead wires for
channel 1 are improperly terminated
(lead wires are reversed).
• Controller is misapplied.
[Err`8] appears on the
display
• Refer to sensor wiring instructions.
• Refer to controller specifications.
• System may need to warm up.
• Under-range Error has occurred on
channel 1.
• Controller measures a temperature
below the allowable operating range.
• Temperature sensor lead wires for
channel 1 are improperly terminat-
ed (lead wires are reversed).
• Controller is misapplied.
[Err`7] appears on the
display
• Evaluate condition of channel 1
sensor and circuitry.
• Confirm temperature sensor com-
patibility. Compare controller part
number and specification to the
chosen sensor.
• Refer to the controller part number
on the sticker label, or view the
controller part number by access-
ing the WatHelp Diagnostics
Function.
• For controllers requiring thermo-
couple sensors, confirm that the
[tc```] parameter is set to the
proper thermocouple curve.
• For controllers requiring RTD sen-
sors, confirm that the [rtd``]
parameter is set to the proper RTD
curve.
• Refer to sensor wiring instructions.
• Refer to controller specifications.
•A/D Overflow Error has occurred on
channel 1.
• Temperature sensor or circuit for
channel 1 is open or damaged.
• Temperature sensor for channel 1 is
incompatible with controller.
• Channel 1 measures a condition
above the controller temperature
range.
[Err`6] appears on the
display
Possible SolutionsPossible CausesSymptom/Indication
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