FAULT FINDING SECTION 7
33
FAULT ACTION
RUMBLING NOISE (a) Scale formation in heater, consult water treatment
specialist. Heater must be descaled and suitable water
treatment provided to avoid re-occurrence.
CONTINUOUS (a) Check gas service cock is open.
IGNITION (b) Check gas control knob is ON.
NO PILOT FLAME (c) Check ECO for failure.
PILOT LIGHTS BUT (a) Main gas valve not energised. Check for loose contacts.
MAIN BURNER (b) Check for 24V AC at intermittent pilot ignition.
DOES NOT Replace control if faulty.
(c) Check for 24V AC at main gas valve terminals. Replace
valve if faulty.
NO IGNITION AT (a) Electrical ON/OFF switch is not ON.
PILOT (b) Thermostat set too low.
(c) Power to unit interrupted.
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