12. Functions sequences
12
Service
manual
487 03 29 91
12.2
General
To facilitate fault-tracing in the electrical system, the description which follows has been
divided into function sequences. At the end of this section there is also a table listing a
number of measurement points.
The following sequences are described here:
• Power supply
• Start of extraction
• Lid opening
• Stop after extraction
• Imbalance during extraction
• Measurement points
Power supply (230V, 50 Hz; 400-415V, 50 Hz; and 440V, 60 Hz)
Machine power supply can be 230, 400, 415 or 440 V 3 AC. An auxiliary transformer is
supplied with two of the line voltage phases and steps down the mains voltage to 24 V
control voltage. The auxiliary transformer is protected by two fuses, one on the primary
side (F1) and one on the secondary side (F2).
The auxiliary transformer supplies the circuit board for automatic functions and the other
components in the control circuit with control voltage.
1
1
R2-R1
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