HD7870/80 /
HD7870/81
3-12
Water
Supply
System
PCBA
NTC
UI PCBA
L
N
Pump M
Water level
sensor
On/Off button
1-cup button
2-cup button
Toggle button
On/Off LED
1-cup LED
2-cup LED
Toggle LED
Regular LED
Strong LED
Memory LED
Descale LED
Buzzer
Communi
cation
Boiler
TCO
Fuse
Fuse
DISASSEMBLY- AND RE-ASSEMBLY ADVISE
Before you start dismantling! For your
safety be sure the plug is disconnected from
the mains! The product is designed for easy
access to the internal components. Make sure
that all accessories like tank, pod holder, drip
tray, spout and collector have been removed.
To remove the back cover (31):
Place the appliance facing its backside. Using a small
screwdriver remove screw cover (
28
) and unscrew both
screws
A
. You can now remove the back cover from the
appliance, please be aware that the Water level sensor (
32
)
is still attached to the back cover.
To remove the brewhead lid cover:
Place a screwdriver on the positions (see picture) and
work your way to the bottm. Please be aware that due
to the construction of the brewhead, the space inside is
limited. There is a chance Hose (
a
) will come off the pillar
when opening the brewhead (
22
).
!
Caution, the hinge spring on the back side of the appliance may
come out when the brewhead lid cover is being removed.
When reinstalling it, mind your fi ngers as this is a strong spring.
To remove the boiler (24):
Caution the boiler may still be hot!
• Remove the back cover.
• Disconnect the Hose (
a
) to the brewhead.
• Unhook the 3-way valve (
27
) from its seat on the
bottom of the brewhead.
• Unhook the boiler from the snap hook on the bottom of
the brewhead.
• Disconnect the following leads:
-
(
x
)
-
(
y
) Boiler –
-
(
w
) Earth
• Remove Hose (
b
) from the bottom side of the boiler.
The boiler will not drain as long as the 3-way valve is still
connected to the top. You can now safely remove the
boiler from the appliance.
Note:
Please note, after replacing the boiler the appliance has to be
restored to factory default. The fi lling procedure (cold fl ush),
known from the predecessor Senseo’s is no longer available
after the fl ush before fi rst use has been executed. When
the “restore to factory default” procedure is not carried out,
a new and empty boiler can be switched on, without having
the protection of the initial fl ush procedure, causing the
thermal fuses in the heating element to fail. After a boiler
replacement or drained system, carry out the “Boiler reset”
procedure! Then the initial fl ush procedure can be carried out.
SCHEMATICS
