Chapter 2 General notes for service technicians
26 SMSO-2-02.02- 15.07.03
ELECTRIC SHOCK
The machine casing needs to be removed to carry out the subsequent work. It is possible that you
could come into contact with live parts. Such contact could be fatal!
Protect yourself from electric shock when carrying out work of this type by disconnecting the
appliance from the mains (by removing the fuses, pulling out the mains plug, etc).
For major testing and adjustment work it is essential that the machine has to be connected to the
mains and switched on while the casing is off. Such work must be undertaken only by trained and
authorised personnel.
Protect yourself from electric shock by taking appropriate measures, such as placing the ma-
chine in an insulated position, wearing voltage-protected gloves, and using appropriate tools
and test instruments.
BURNS AND SCALDING HAZARDS
Some components get very hot during operation, and are also under high pressure. The hot surfa-
ces can cause burns. The pressurised media (hot water, steam) can cause severe scalds if they sud-
denly and accidentally eject.
Never touch any component before you are quite sure that it is not hot.
Always depressurise the system before disconnecting any pipes and screw fittings by opening
the outlet valves and similar.
Check
Description Yes No Statement
Measure(s) to take
Leaked water on the framing floor
• Interior of
framing
Traces of water spray on the framing and other
components
• Brewing unit
(do not dismantle): Cracks on the housing,
Heat or burn marks on the pump, flowmeter
• Water
metering
system
Calcium residues or calcium fusions on pipes and
screw fittings
Calcium residues or calcium fusions on pipes and
screw fittings
Safety thermostat and heater connections: Heat
or burn marks
• Instant
heater
coffee/tea
Solenoid valves: oxidised connections
Heat or traces of burns on the plug or on the ca-
bles
State of the insulation.
• Booster
State of the booster brewing unit line: twisted or
bent?
Calcium residues or calcium fusions on pipes and
screw fittings
Safety thermostat and heater connections: Heat
or burn marks
Internal visual
check of
cleanliness
and mechani-
cal defects
Leaks and
effects of heat
• Steam
generator
Solenoid valves: oxidised connections
Ground conductor connections on housing and
EHS
Toroidal core transformer / stabiliser / PCBs: Heat
and burn marks, plug and cable defects
Cable loom /cabling: Insulation defects, burnt plug
casing or cable (odour!)
Electrical and electronic com-
ponents
Limit switch: oxidised connections,
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