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Service Manual EF 473 / EF 474 enVersion 1.0
Electronic control board, wiring
diagram - Europe (230V / 50 Hz)
1) Heat sink
2) Print for button "large cup" with LED
3) Print for button "small cup" with LED
4) Flow meter
5) NTC temperature sensor
6) Fine-wire fuse on thermoblock
7) On/Off switch
8) Fine-wire fuse on pump
Electronic Main Board
NTC
Print “large cup”
L
N PE
Thermoblock
T 167°C
Pump
T 128°C
Mains Plug
GND
Flow meter
Print “small cup”
Heat
Pump
Neutral
Line
On/Off switch
1
2
1a
2a
1
8
3
2
5
7
4
6