Repair work at the inner and outer chamber
7.6 Checking and replacing the frame heating wire (-4E3 )
Spare parts:
Frame heating wire KBF 115, (order no. 5005-0185)
Frame heating wire KBF 240, (order no. 5005-0168)
Frame heating wire KBF 720, (order no. 5005-0177)
Connector 6-poles (order no. 5024-0157)
Necessary
tools
Crosstip screwdriver, size 2
Multimeter measuring device
It is impossible to remove the frame heating wire (-
4E3)
because it is included in the insu-
lating foam above the door frame.
A new frame heating wire can be placed under the frame gasket.
1.
Disconnect the unit from the power supply andremove the frame gasket (chap. 7.5).
2.
Disconnect the connection of the frame heating wire (A) at the compact plug (-
X70
).
3.
Use a multimeter to measure the resistance of the frame heating wire at pins 3 and 6 of the compact
plug (-
X70
). The resistance should be 480
Ω
± 10%. If the measuring results in another value, the
frame heating wire is defective and must be replaced.
4.
Disconnect the frame heating wire approx. 10 cm /
3.9 in
after the plug (-
X70
) at pins 3 and 6.
5.
Place the new frame heating wire tightly along the inner chamber edge (B). Pull the edges through a
previously made opening in the insulating foam of the lower door hinge towards the electric mounting
plate.
6.
Strip the insulation of the cut cable ends at the plug (-
X70
) and of the new frame heating wire by ap-
prox. 10 to 15 mm /
0.4 to 0.6 in
.
7.
Place the frame heating wire towards the rear on the silicone casing and connect the ends with con-
nection clamps.
8.
Mount the frame gasket and then check if the frame gasket fits correctly against the interior side of the
outer door (chap. 6.2.6).
A B
A
Frame heating wire
B
Inner chamber edge
1
2
3
4
5
6
Figure 25: Checking and replacing the frame heating wire (-4E3 )
Figure 26: Assignment of compact plug ( -X70 )
Service Manual KBF (E5.2) 04-2015
63
