GV 640 Service Manual 92
9.3 Noises
9.4 Electrical errors
9.5 Mechanical errors
Error Cause Rectifying errors
Noises in operation too loud. A styrofoam plate was installed on the right-hand side of some of the
dishwashers in order to avoid transport damage. This is no longer
required with FD 8809.
None. Claims concerning the occurence of noise are the same
as for dishwashers without a styrofoam plate.
Error Cause Rectifying errors
Piezo electronics cannot be
operated.
Switching procedure is not recognised by the electronics unit. Replace the control panel with piezo controls.
Residual current circuit breaker trips, info
light flickers.
Ground contact through build-up of condensate on the info light. Replace the info light and cut out the insulation mat.
Salt refill display lights up permanently.
• Tolerances in the sensor switching values.
• Salt tabs used.
• Replace the salt refill sensor. The switching values were changed.
• Advise the customer: do not use salt tabs.
No function. Main switch mechanically defect. Replace the main switch.
Error Cause Rectifying errors
Bottom dishwasher basket falls into the dish-
washer.
Tolerances. Replace the bottom basket.
Door cannot be closed. Catch on the door lock snapped back. Shut the door firmly until the catch functions normally again.
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