Service
Manual
12. Troubleshooting
12
18
438 9152-31/06
05.03
08E
The water temperature rises slowly (less than
5°C each 10 minutes).
If the power is on, be very careful when
working on the machine.
Try to restart the machine (i.e. reset the error
code) by pressing the Start button quickly. If the
error returns, first make sure that:
• the heat supply is intact (all phases OK and
the steam or gas boiler is operating)
• the drain does not leak.
1. Enter the service programme and fill up with water
(code 24) to at least the 80 level. Start heating (code
21). Does the heating contactor go high?
Yes No
Troubleshoot the operating circuits
of the contactor
2. Measure the operating voltage across each element.
No voltage Voltage present
3. Use a clip-on ammeter and verify that all
phases draw current (6 - 25 A depending on the
element rating) or, alternatively, switch off the
voltage with the wall-mounted power switch
and measure the resistance of the elements,
which should be 20 - 25 ohms (2.5 kW) or 40 -
50 ohms (1 kW).
Resistance OK Incorrect resistance
Inspect the elements Replace the defective
for lime deposits. element
Decalcify if necessary.
4. Troubleshoot the voltage supply circuit for the
elements.
Fig.
23
23
5185
Element connectors
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