Unox WF19 Error Code
Lack of detergent.
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WF19 mean?
WF19 is a lack-of-detergent warning for the automatic cleaning system. The oven has detected that detergent is not available for a cleaning cycle, so it warns the user. It typically relates to an empty container, an air-locked or blocked detergent line, or the detergent level detection.
Symptoms
- WF19 warning on the control panel
- Automatic cleaning cycle cannot start or pauses
- Detergent container empty
- Warning recurs at the start of cleaning
Common causes
- Detergent container empty or not connected
- Air-locked or blocked detergent line
- Detergent pump fault
- Detergent level detector fault
- Wiring fault to the detection circuit
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Diagnostic steps
Check the detergent supply
Confirm the detergent container has product and is correctly connected to the oven.
Prime the line
Clear any air lock or blockage in the detergent line so product can reach the chamber.
Check the pump and detector
Verify the detergent pump runs and the level detector reports correctly when product is present.
Repair detection wiring
With power off, inspect and restore wiring to the detergent detection circuit.
When to call a professional
WF19 is usually resolved by refilling and reconnecting detergent. If product is present and the warning persists, the pump, level detector or its wiring may be at fault, which a qualified Unox technician should diagnose. Handle cleaning chemicals per the safety data sheet.
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Other Unox Error Codes
Motor thermal protection alarm (permanent error) — the fan motor's thermal protection has tripped.
Safety thermostat alarm — the chamber safety thermostat has tripped above its limit.
Temperature probes alarm — a cooking chamber temperature probe is damaged or disconnected.
Communication error with the power board — the control board lost communication with the power board.
Gas alarm — a fault in the gas burner/ignition system (split into multiple AF23 conditions on later software).
Wrong position of Pollo valve.
Trolley is missing.
Tank missing or safety thermostat fault.
Chamber ceiling temperature too high.
Chamber over-temperature condition (Case 1: T > 150 °C / 302 °F; Case 2: T < 150 °C).
Single-point or multi-point core probe completely damaged.
Chamber temperature probe warning.