The three relays are connected in the control unit
with a single connector.
The operation is checked by means of LEDs that
light up in the heating phase of the machine. To
test simply let out a lot of steam from a steam
nozzle until the heating elements starts again.
Optimum operation will be when impulses are
spaced at varying intervals.
The relay of the groups and coffee boilers are in
divided in pairs as shown in the figure. C1 and
G1 are Heater 1 and group 1 etc.
Each time the probes detect the need to heat a
specific heater or a group, a LED will light up at
the side activated.
The configuration of the cables is also present in
the relays protection box.
Edition 01 of 08/2017
8.8
SERVICE MANUAL
Fig. 277
Fig. 278
Fig. 279
Fig. 280
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