Service 32 Rational — Ignition Failure / No Flame Detected

At a glance

Severity: FAULT STOP
Domain: COOKING_GAS_SYSTEM
Reference standard: EN 203 (Gas appliances) - Safety lockout
Product / context: Gas Ignition Failure / Reset

What it means

The flame control unit opened the gas solenoid valve and activated the spark igniter, but the ionization probe did not detect a flame within the safety time. Nominal gas pressure: 20 mbar (natural gas G20), 30 mbar (LPG G30), 37 mbar (LPG G31). Minimum ionization current: 1 uA, typical: 3-6 uA.

Probable causes

Main gas shut-off valve in the kitchen closed.
Ionization sensing electrode oxidized or fouled with grease.
Ignition electrode faulty or high-tension cable grounding out.
Gas valve defective or coil open-circuit.

Reference values

pressione gas nominale mbar	{"metano_G20":20,"GPL_G30":30,"GPL_G31":37,"tolleranza":"± 15% from nominal"}
corrente ionizzazione uA	{"minimo":1,"tipico":"3-6","buono":">6","nota":"Measurable with microammeter in series with the probe"}
tempo sicurezza s	{"accensione":"3-10","supervisione":"<1","nota":"Depends on manufacturer and valve type (SIT, Honeywell)"}

Where to start

Quick visual check: is the gas shut-off valve upstream of the appliance open? Are other gas burners in the kitchen working?

Full guided diagnosis in the app

The diagnostic tree for this fault has 6 guided steps with measurements, checks and resolutions. You'll find it in HorecaIQ, one of the five IndexOS apps: free, works offline.

Open HorecaIQ

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