Chapter 1 Safety regulations
SMSO-2-02.01- 15.07.03 7
1.2 Electronic regulations
1.2.1 General
DANGER TO LIFE
When carrying out any work on electrical
appliances, fatal injuries may be caused by
electric shock, if live parts are touched.
Even at low voltages, contact with live parts
can also cause bodily harm to people; such
work must be carried out only by authorised
and qualified electricians.
1.2.2 Checking electrical circuits
When carrying out any maintenance work you must observe
the following working rules.
Checking while disconnected from power supply
If possible, always check the electrical circuits when they are
disconnected from the power supply. Disconnect the machine
as follows:
1. Isolate the machine (fully disconnect)
2. Make sure that it cannot be switched on again (lock and
label the switch)
3. Ascertain that it is fully disconnected (if necessary check
for external voltage from linked systems).
Checking while connected (exceptional situations only!)
If you do in fact need to check the machine while it is con-
nected to the power supply, it is essential that you observe the
following rules:
1. Only use tools with insulated and voltage-tested handles.
2. Place covers, casings or other suitable measures to en-
sure that it is not possible to come into accidental contact
with live parts.
3. Ensure the unit is placed in an insulated location, and in
all cases use the voltage-tested gloves.
4. Do not carry out such tests alone, but always ensure that
another person with first aid skills in treating electric
shock is present, who in the case of an emergency can
take quick action.
Never bypass any of the safety elements (fuses, safety
thermostats etc.)
Safety fuses protect connected appliances from current
surges when an overload occurs, or in the event of a
short circuit. If the fuse values are too high, a fault could
cause material damage or a fire. Safety fuses should
therefore only be replaced with fuses having the same
nominal values.
When checking electrical circuits please observe the
circuitry of each of the components. Transistor-switched
consumers in particular must be tested in accordance
with the semi-conductor elements. Incorrect measure-
ments can cause semi-conductors to become faulty.
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