Field Actions
DISPATCHAlways disconnect appliance from 230V/400V mains before opening panels. Use CAT III multimeter for circuit testing.
Frequently Asked Questions: Novomatic AL23
FAQ TREEWhat does error code AL23 mean on a Novomatic appliance?
Novomatic error code AL23 indicates: Novomatic GS / GSU Integrated & Freestanding Electronic Dishwasher Series: Diagnostic fault code AL23 registered by the microcomputer controller. Water softener regeneration solenoid valve open circuit or jammed mechanical plunger.
What is the root cause of Novomatic error code AL23?
The primary root cause for Novomatic code AL23 is: On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail OEM wash system with 1800W flow tube element (27-31 Ω), wash motor (95-125 Ω), and pressure membrane switch: ion-exchange regeneration valve coil open circuit or mineral scale jamming armature seal. Metrological tolerance verification: regeneration valve coil resistance 3.8-4.6 kΩ at 20°C; 230 VAC drive voltage during cycle step..
How do I fix or resolve Novomatic error code AL23?
To resolve error code AL23: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: measure solenoid coil resistance with multimeter expecting 3.8-4.6 kΩ, verify 230 VAC trigger and inspect seal. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: press and hold the Program selector and Start buttons together for 5 seconds until the display beeps and drain pump evacuates remaining water.
Is it safe to clear Novomatic error code AL23 by resetting power?
Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Novomatic code AL23 persists, the physical component causing On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail OEM wash system with 1800W flow tube element (27-31 Ω), wash motor (95-125 Ω), and pressure membrane switch: ion-exchange regeneration valve coil open circuit or mineral scale jamming armature seal. Metrological tolerance verification: regeneration valve coil resistance 3.8-4.6 kΩ at 20°C; 230 VAC drive voltage during cycle step. must be inspected or replaced.
How do I test electrical resistance for Novomatic code AL23 using a multimeter?
Set a digital multimeter to ohms (Ω). Disconnect power and test Mechanical Pressure Switch Contacts / Inductive Frequency Sensor across Across switch spade contacts with harness unplugged; electronic output: 40Hz–50Hz frequency signal. Expected nominal reading is Mechanical: Continuity 0.0Ω–0.2Ω (Empty: 11-12, Full: 11-14). Electronic: 20Ω–45Ω coil resistance.. Tolerance: Mechanical switch contacts must transition cleanly on gentle breath pressure. Coil ~22Ω ±5%..
What safety protocol must be followed before servicing Novomatic code AL23?
Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.
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