M&C TechGroup BA-P4 Operator's manual - Manual (Page 24)

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Gas sampling and conditioning technology 10-1.1-ME
16.4 RESET OF THE CONTROLLER
A reset out of the temperature lock happens with connected mains:

operating simultaneously the keys EXIT and

A reset only happens in case the actual temperature deviates by < +/- 10°C from the theoretical
temperature.
Another method for a reset that functions without problem is to cut the mains voltage for a short
moment (remove the mains plug).
N O T E !
Watch carefully the control characteristic after reset. This simplifies the
diagnosis of errors when a failure happens again!