Ariston GENUS 30 Plus, Installation And Servicing Instructions

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15.8 Combustion Analysis
The boiler is designed to make it easy to analyse the
combustion by-products.
Using the specially designed test points, readings can be
taken on the temperature of the combustion by-products
and of the combustion air, as well as of the
concentrations of O
2
and CO
2
, etc.
The best maximum-power test conditions for the heating
system are obtained by turning the Selector Knob 25
(Section 15.4) to central heating only and turning the
C.H. temperature control knob 27 to maximum.
15.9 Boiler Safety Systems
If a fault occurs in the appliance, one or more LEDs (28 Fig.3.1) flash according to the fault type listed in the table below.
m m
= LED off
l l
= LED blinking
Code FAULT INFORMATION
30 40 50 60 70 80
m m m m m m m m m m l l
Overheating safety feature
m m m m m m m m l l l l
No flame detection
m m m m m m l l m m l l
Anti-frost mode on (pump in operation)
m m m m m m l l l l m m
Anti-frost mode on (burner and pump in operation)
m m m m m m l l l l l l
Lack of water circulation
m m m m l l m m m m m m
Primary water circulation defect
m m m m l l m m m m l l
D.H.W. thermistor faulty (open cicrcuit)
m m m m l l m m l l m m
D.H.W. thermistor faulty (short circuit)
m m m m l l m m l l l l
Central heating return thermistor faulty (open circuit)
m m m m l l l l m m m m
Central heating return thermistor faulty (short circuit)
m m m m l l l l m m l l
Central heating flow thermistor faulty (open circuit)
m m m m l l l l l l m m
Central heating flow thermistor faulty (short circuit)
m m l l m m m m m m l l
Low water pressure in the heating system
m m l l m m m m l l m m
Re-ignition attempt
m m l l m m l l m m m m
Wiring problem (or fuse 1.25 A)
m m l l m m l l m m l l
Fan on but does not activate air pressure switch
m m l l m m l l l l m m
Fan off but air pressure switch fails to return to off position
m m l l m m l l l l l l
Low fan speed
m m l l l l m m m m m m
Operating control fault of the fan
m
m l l l l m m m m l l
Thermistor «comfort» (open circuit)
m m l l l l m m l l m m
Thermistor «comfort» (short circuit)
m m l l l l m m l l l l
Cylinder temperature 5oC above set point
l l m m m m m m m m m m
Communication defect with the main PCB