Descaling; Troubleshooting - Krups KM740D50 DEFINITIVE SERIES User Manual

KR_COFFEEMAKER_KM740D50_NAFTA_V8_OK_Mise en page 1 12/07/12 08:44 Page11

8. DESCALING

n Calcium build-up frequently occurs in drip coffeemakers. This build-up is normal and is caused by
minerals commonly found in drinking water. Periodically, your coffeemaker will need cleaning to remove
calcium or mineral deposits that may form. You will know when your unit will need descaling when you
notice an obvious slow down in brewing time.
n We recommend descaling your unit with a solution of white vinegar and cold water or a suitable
descaling agent. A solution of two tablespoons of white vinegar to one carafe of cold water works best.
Pour this solution into the water tank, and follow your normal operating instructions, without a filter in
the filter basket.
n When the brew cycle is finished, empty the carafe and rinse with water. Refill the water reservoir with
cold water only and repeat the brew cycle with water only, twice more. This will rinse out any remaining
vinegar solution.
- We strongly recommend decalcifying your coffee maker any time the brewing time slows down or when
you begin to notice excessive steaming. The frequency of decalcifying will depend on the hardness of
your water. We suggest decalcifying approximately every 80 brew cycles if you have soft water or every
40 brew cycles if you have hard water.

9. TROUBLESHOOTING

PROBLEM
The coffee does not brew
or the machine does not
switch on.
Appliance appears to be
leaking.
It takes a long time to
brew.
n Check to ensure the appliance is plugged into a working outlet, and the
appliance is in the "ON" position.
n The water tank is empty.
n There was a power failure.
n There was a power surge. Unplug the machine, then plug it back in.
n The clock must be reset after a power failure.
n The Auto-Off function switches off the coffee maker. Switch off the
coffee maker then switch it back on to make more coffee. For more
information, refer to the section "Making coffee".
n Make sure that the water tank has not been filled beyond the max fill level.
n It may be time to descale your coffee dispenser.
n Numerous minerals may accumulate in the coffee maker's circuit.
Periodic descaling of the machine is recommended. More frequent
descaling may be necessary depending on the hardness of the water. For
more information, refer to the "Descaling" section.
NOTE: do not dismantle the machine.
SOLUTION
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