Unox WF06 Error Code
Power board temperature / over-heating warning (also shown as WF06/U01).
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WF06 mean?
WF06 (also shown as WF06/U01) is a power board over-heating warning. The power board has become too hot, usually because the back cooling fan is not adequately cooling it. As a warning the oven keeps working with reduced function while alerting that the electronics are running hot and need attention.
Symptoms
- WF06 or WF06/U01 warning on the control panel
- Back cooling fan not running
- Warning appears during extended high-temperature use
- Warning clears when the board cools
Common causes
- Back cooling fan not running
- Cooling fan not receiving its 230 V AC supply
- Wrong cooling air flow direction or blocked airflow
- Excessive ambient temperature around the oven
- Power board fault
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Diagnostic steps
Check the back cooling fan
Verify whether the back cooling fan runs; the warning is tied to inadequate cooling of the power board.
Test the fan supply
Measure the supply at the cooling fan connection with a multimeter set to VAC and confirm it receives 230 V AC.
Check the air flux direction
Verify the direction of the air flux is correct so the fan actually cools the board.
Replace the fan or board
Replace the back cooling fan if it does not run with power present; if cooling is correct but the warning persists, have the power board checked.
When to call a professional
WF06 means the control electronics are overheating. Testing the cooling fan supply at 230 V AC and checking the power board are mains-voltage tasks for a qualified Unox technician. Address it promptly even though the oven still runs, to avoid heat damage to the board.
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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.