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Error code reference
Ariston Dishwasher Error Code AL 99
Communication not possible - serial communication failure between Bit100 timer and interface card.
SourceMerloni Dishwasher EVO3 - Full Service Manualp. 48
Diagnostic procedure
The full AL 99 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check cables on serial connector; verify motor and timer connections are not disconnected or inverted; check auxiliary starter wash motor.
SourceMerloni Dishwasher EVO3 - Full Service Manualp. 48
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Ariston dishwasher.
Models covered by the manuals that document this code
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