100 GV 640 Service Manual
For internal use only
9.7 Checking water hardness in the dishwasher when error
messages are displayed
Some errors require a check of the water hardness level in the dishwasher. To be clarified beforehand:
• Is regenerating salt used?
• Has regenerating salt been filled in?
• Has the water softening equipment been switched on?
• Has the right hardness level been set?
• Does the customer use tabs (which)?
9.7.1 Check for active softening equipment
1. Start a test program and let the appliance fill up until the first break with a visual inspection.
2. Determine the water hardness in the dishwasher in a water hardness test.
The reading should be approx. 5° to 7°dH if the softening equipment is intact and the regeneration
cycles are properly set.
If the reading is far higher than this the softening equipment will need to be checked.
9.7.2 Operation with the softening equipment switched off
When the softening equipment is deactivated detergent tabs with salt substitutes should be used. Ob-
serve the instructions on the packaging.
The chemical substances in multi-function tabs bind the calcium content of the water themselves. They
are effective up to approx. 21° dH. The manufacturer's product specification must be observed.
1. Test the water hardness of the inflowing water.
2. Advise the customer
• If the water hardness level is higher than the level at which the tabs used effectively soften the
water, the customer should be advised to use the regeneration system with regenerating salt.
• If the customer uses tabs without any salt substitutes, the use of special salt should be pointed
out.
3. Make the correct appliance settings.
To Previous Page
Loading...
Need help?
General
