Nordmann Engineering AT4 D SPA Display, Service Manual

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Contents
1 Introduction 4
2 Settings in the engineering level 5
2.1 Launching the Engineering level 5
2.2 Setting the intensity levels for the fragrance pumps 5
2.3 Setting the replacement interval time for the steam cylinder 6
2.4 Activating/deactivating the drain cooling 6
2.5 Setting GFCI operation 6
2.6 Setting the heating current monitoring 8
2.7 Setting the On/Off hysteresis 9
2.8 Setting the Stop Mode for bathing operation 9
2.9 Setting-up temperature sensor monitoring function 10
2.10 Resetting the control to factory settings 11
2.10 Setting-up countdown function/resetting countdown 12
3 Malfunctions 14
3.1 Operating malfunctions 14
4 Control matrix Steam bath control /
Principle diagram P-regulation 25
4.1 Control matrix Steam bath control 25
4.2 Principle diagram P-regulation 26
4.3 On/Off hysteresis of the supply and the exhaust fan (2-fan operation) 27
5 Water management 28
5.1 The SC system of the Nordmann AT4 D 28
5.2 The use of softenend water for the operation of the Nordmann AT4 D 29
6 Block diagrams 31
6.1 Block diagram CPU 31
6.2 Block diagram power board 32
6.3 Block diagram steam bath board 33