Siemens washing machine Instruction Manual And Installation Instructions page 24

Faults that require repair service
Three simultaneously blinking display lights indicate that the service department is needed.
If this happens,
- Set programme selector on "Stop"
- Pull out mains plug for 10 s
- Reinsert mains plug
- Select programme and start again.
If the indicated fault remains, the service department is to be notified.
SUGGESTION:
Disconnect washing machine from mains and turn off tap.
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