Unox WF27 Error Code
Lack of water or valve EL1 fault.
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WF27 mean?
WF27 is a lack-of-water warning linked to valve EL1. Like WF16, it indicates the oven is not getting the water it needs through the EL1 circuit, either from the supply or because EL1 is not delivering water. The oven warns while continuing with reduced water-dependent function.
Symptoms
- WF27 warning on the control panel
- Insufficient or no water/steam
- Water-dependent functions impaired
- Warning recurs when water is requested
Common causes
- Water supply off or low pressure
- Clogged filter or inlet
- Valve EL1 stuck closed or faulty
- Wiring fault to EL1
- Blocked or kinked water line
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Diagnostic steps
Check the water supply
Confirm the water tap is open and at adequate pressure.
Inspect filter and line
Check the inlet filter and water line for blockage or kinks.
Test valve EL1
With power off, verify EL1 actuates and is not stuck closed; check its supply when energised.
Repair or replace EL1
Restore faulty wiring and replace EL1 if it does not open on command.
When to call a professional
WF27 starts with operator checks of supply and filter. If water is present and EL1 still fails, testing and replacing the solenoid valve is electrical and plumbing work for a qualified Unox technician.
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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.