HD7751
3-7
De-scaling
If the water system is nearly or less clogged by scale then
operate the coffeemaker a few times with vinegar or with a
10-15% solution of either vinegar-acid, citric acid or tartar
acid, into cold tap water.
Do not use other de-scaling agents as these may harm the
appliance.
If this procedure does not restore the function, then switch
off the coffeemaker when the acid has passed through during
approximately 3 min. Keep the appliance in this condition
overnight and continue/repeat the cleaning operation.
After the de-scaling procedure, operate the coffeemaker twice
with tap water in order to rinse away any residual substances.
ELECTRICAL DIAGRAM
REPAIR INSTRUCTIONS
M
M
Synchronous
Motor
Grinder
Motor
Black
Black
Black
Red
H1 (Black)
W2 (Red)
W1 (Blue)
Motor
AC
L
N
Motor
DC
Control
PCB
Heat
Conn 1
Warm 2
Warm 1
LCD
PCB
9
B (Grey)
Conn 2
SW2
SW1
S4 (Grey)
S3 (Grey)
S1 (Grey)
S2 (Grey)
H4 (White)
X4 (White)
Thermal
Fuse
Thermostat
H2 (Black)
H3
(Black)
Warm
Plate
Brown
Blue
L
N
Mains
Close
Switch
On/Off
Switch
Open
Switch
