GV 640 Service Manual 7
For internal use only
1. Safety
Danger!
Repairs may only be carried out by a qualified electrician!
Repairs that are not carried out properly may lead to risks and injuries for the
user!
It is essential that you observe the following instructions in order to prevent electric shocks:
• The casing and the frame may be live in the event of faults!
• Touching live components inside the appliance may cause dangerous currents to flow through your
body!
• Disconnect the appliance from the mains prior to carrying out any repair work!
• When inspecting live parts, a residual current circuit breaker must always be used!
• The earthed conductor resistance must not exceed the resistance specified in the standard! It is
vital for ensuring the safety of persons and the functioning of the appliance.
• On completion of repairs, an inspection must be carried out in accordance with VDE 0701 [Associ-
ation of German Electrical Engineers] regulations or with the corresponding regulations for your
country!
• On completion of repairs, a function and impermeability inspection must be carried out.
Attention!
It is essential that you observe the following instructions:
• Due to the all-pole disconnection (relay, press switch), when carrying out measurements via the
connector plug in accordance with VDE 0701, a direct measurement must be used to check the
heating (flow heater) for insulation faults or the appliance's differential current must be measured!
• When changing additional devices and the pump cavity, beware of sharp edges around the stain-
less steel components.
• The appliances must be disconnected from the mains prior to all repairs. If inspections must be car-
ried out on live appliances, make sure you use a residual current circuit breaker.
Cuts on sharp edges: use protective gloves.
Components may be electrostatic!
Observe handling regulations!
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