Fault Diagnosis; Errors Not Indicated In Display; Error Messages In Display; Troubleshooting - Wittenborg FB 5100 Service Manual

17. Faults

Fault Diagnosis

The list of possible faults and the appropriate trouble shooting is divided into two main groups:
- Faults which are not indicated in Display
- Faults which are indicated as messages in Display

Errors not indicated in Display

Fault
No function, no display
Noise from the brewer
Drinks too cold

Error messages in Display

Fault
Door open !
Insert cup
Possible cause
• Main switch defective
• Power supply interrupted
• Cable harness defective
• Electronic control defective
• Plug contact fault
• Fuse defective
• Brewer tacho defective
• Contact fault
• Cable harness defective
• Mechanical defect
• Water supply too cold
• Temperature sensor is
maladjusted
Possible cause
• Door not closed properly
• Door switch defective
• Door harness defective
• No cup located on cup
platform
• Defective cup sensor
Remedy
• Check the main switch, replace it if neces-
sary
• Check the power supply
• Check the fuse in the power supply unit,
replace it if necessary
• Check the power supply cable, replace it if
necessary
• Replace the cable harness
• Replace the electronic control
• Check contacts, replace if necessary
• Check the power supply, replace the fuse
if necessary
• Check the brewer tacho, replace it if nec-
essary
• Check the contacts (check cable harness
for conductivity)
• Check the cable harness, replace it if nec-
essary
• Check actuator, replace it if necessary
• Raise temperature
• Check and adjust temperature setting
Remedy
• Close door properly
• Check, replace if necessary
• Check, replace if necessary
• Place cup on cup platform
• Check, replace if necessary
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