GV 640 Service Manual 95
9.6.3 Customer service program - structure
See also the switch documents for the respective model.
Function Display
Can it be
skipped?
Time (s) Value Check measure Comment
Preparation Remove approx. 0.5 ltr. of
water from the salt box.
Check for tightness, regeneration valve essential if
customer gives relevant information (see also steps
with display S:11 + S:33).
Coil check S:00 No Approx. 20 Check the discharge pump. Activate the discharge
pump and position the water diverter in the top basket
position.
Checking the flow
sensor and flow
governor
S:01 - S:03
(steps S:04 - S:06 are
only shown in the
event of an error)
No Approx.
10 - 100
Fill in 50 ml (the filler valve, the discharge pump and the
circulation pump are successively activated).
Pause S:07 (step is not
displayed)
Yes 10
Filling + pumping S:08 - S:10 No Approx. 100 Heat exchanger is overfilled, residues in the pump
cavity are pumped off ==> heat exchanger full (contains
3.1 l water).
Pause S:11 Yes 10 Visual inspection of the
water level in the salt box.
No change in the water level ==> regeneration valve
closed.
Filling S:12 No Approx. 36 1.5 l Water volume is completely filled into the pump cavity
with the heat exchanger.
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