Unox WF23 Error Code
Blower tachometer alarm.
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WF23 mean?
WF23 is a blower tachometer warning. The tachometer that measures the blower (fan) speed is not returning a valid signal, so the oven cannot confirm the blower is running at the correct speed. It warns the user while air circulation monitoring is impaired.
Symptoms
- WF23 warning on the control panel
- Blower speed cannot be confirmed by the control
- Possible uneven air circulation
- Warning recurs during operation
Common causes
- Faulty blower tachometer / speed sensor
- Wiring fault on the tachometer signal
- Connector fault at the sensor or board
- Blower motor speed irregular
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Diagnostic steps
Power down and check the sensor
Turn off power and inspect the blower tachometer and its connections.
Reseat the connector
Reconnect the tachometer signal connector at the sensor and the board.
Test the signal wiring
Check continuity of the tachometer wiring with a multimeter.
Replace the sensor
Replace the tachometer if it does not provide a valid speed signal and retest.
When to call a professional
WF23 concerns the fan speed feedback. Testing and replacing the tachometer requires opening the oven and accessing the blower assembly, which a qualified Unox technician should handle if reseating the connector does not resolve the warning.
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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.