Slim Jim Idrocompresso User manual
page 33
Check machine condition, report malfunctions
It will help the service technician solving problems if some information about the machine is known
before a house-call is scheduled. This information should include:
1. serial number of the machine
2. free flow rate of each individual group
3. a well-defined description of the malfunction
Free-flowrate
During “free-flow” (no filter holder locked in the group) the flowrate gives an indication of the smallest
opening in the coffee system of the machine. In the lever-operated Slim Jim that will be the orifice of
the group-valve (diameter 1.5mm).
At 3 bar water pressure with lever in lowest position the free flow rate at the lever group should be
about 1.5 l/minute. If one or more groups have a free-flowrate that falls outside the range in the table
below it is advised to have a technician check the machine.
valve orifice diameter
(mm)
minimum
(l/minute)
goal
(l/minute)
maximum
(l/minute)
1.5
1.0
1.5
2.0
Table 2. Showing range of free-flowrates for water of 90-95°C at 3 bar pressure for a valve with orifice
1.5mm.
Heating element indicator lights
If there is a heating problem with the machine, the indicator lights help to determine possible causes.
A set of indicator lights is found on the bottom of the electronics box, see
If the machine is warmed up and functioning correctly, the 3 lights on the left (steam boiler heating) will
light up simultaneously at longer intervals and
“in sync”
6
with the corresponding orange centre line
shown on the control panel. The 2 or 3 lights on the right (coffee boiler heating) will light up shortly at
somewhat erratic intervals but in sync with the corresponding orange centre line on the interface.
Figure 28. The heating element indicator lights on a Slim Jim Triplette, left indicator lights for the
steam boiler, right for the coffee boilers. See also
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The control panel-display is lagging by about 0.5 seconds w.r.t. the indicator lights.
coffee
steam
gr1
gr2
gr3
lower
middle
upper
electrics tray
GROUP 1
93.4
GROUP 2
45.6
GROUP 3
93.2
STEAM
124.6
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