22 18-09-2007 122770 06
Error: Calibrator does not heat (ATC-250/320/650)
Error message:
-
Likely cause: Solution:
Defective well Check impedance of the heating elements
(29Ω +10% - 5% for each of the main
elements and 96Ω +10% - 5% for each of
the top elements). For ATC-250 main 60Ω
±10% and top 200Ω ±10%.
Turn on the instrument and set the SET
temperature to max. temp. (250°C (ATC-
250), 320°C (ATC-320) or 650°C (ATC-
650)).
Check that relay K1 has been pulled.
If the relay has not been pulled, check with
a short circuit in the connector CN4. If this
pulls the relay, the sensor is defective.
Change the sensor if possible, otherwise
change the entire well, adjust and calibrate
the unit.
Defective Power PCB If this does not pull the relay the Power
PCB is defective.
Change and adjust the Power PCB.
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