83
Replacing the power cable
When replacing the power cable, use the following
cable type: H05V2V2-F 3 G 1.5 mm
2
. Connection: See
page 88.
Checking the fuse
A
F1
Fig. 55
1.
Switch the ON/OFF switch to OFF: See page 41.
2.
Loosen the side locks and fold down the HMU heat
management unit.
3.
Remove cover
A
.
4.
Check fuse F1: See connection and wiring dia-
gram.
Danger
Incorrect or improperly fitted fuses can lead
to an increased risk of fire.
■
Insert fuses without using any force. Posi-
tion fuses correctly.
■
Only use structurally identical types with
the specified response characteristics.
Mixer extension kit
Checking the setting of rotary switch S1
The rotary switch on the PCB of the extension kit
defines the assignment to the relevant heating circuit.
On all extension kits, check that a consecutive number
is set on rotary switch S1.
Checking the rotational direction of the mixer
motor
After being switched on, the appliance implements a
self-test. During this, the mixer is opened and closed
again.
Note
The mixer motor can also be started via the actuator
and sensor test: See chapter "Checking outputs".
Observe the rotational direction of the mixer motor dur-
ing its self-test.
Then manually set the mixer to "OPEN".
The flow temperature sensor must now capture a
higher temperature. If the temperature drops, either
the motor is turning in the wrong direction or the mixer
insert is incorrectly fitted.
Mixer installation instructions
Troubleshooting
Repairs
(cont.)
5839343
Diagnosis
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