GV 640 Service Manual 91
9. Error diagnosis
9.1 Malfunctions
9.2 Result errors
Error Cause Rectifying errors
Tab does not dissolve. Spray arm stiff, jams.
Check the functioning of the top spray arm (use of glass doors, spare
part Nr. 436987 for 81 cm, 436988 for 86 cm).
Tab does not drop into the basket handle of
86 cm appliances.
Tolerances. Insert a tab slide (spare part No. 436958) into the top basket.
No function. Main switch mechanically defect. Replace the main switch.
Error Cause Rectifying errors
Poor rinsing results in the top basket. Spray arm stiff, jams.
Check the functioning of the top spray arm (use of glass doors, spare
part No. 436987 for 81 cm, 436988 for 86 cm).
Poor drying results.
Leak in the drain valve of the heat exchanger.
Heat exchanger empties between rinsing and clear rinse cycles.
Check the drain valve for leaks and replace if necessary.
Poor rinsing results in the bottom basket for
zeolite dishwashers.
Spray arm blockage on the blow-out cap of the zeolite container. Check that the cap is securely in place. It must be locked until it stops.
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