Riello Array AR 399 SE - 5.5 Troubleshooting

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OPERATION
5.5 Troubleshooting
FAULT CAUSE SOLUTION
There is a smell of gas Gas supply circuit leaks
− Check the seal of the gaskets and the
pressure test ports/taps for leaks
Odour of unburnt gas Flue gas circuit
− Check the gasket seals
− Make sure there are no obstructions
− Check the combustion quality
Irregular combustion
Burner gas pressure − Check the setting
Orice installed − Check the diameter
Dirty burner and heat exchanger
− Clean the burner and heat exchanger
− Perform a combustion analysis
Heat exchanger passages obstructed
− Clean the burner and heat exchanger
− Perform a combustion analysis
Faulty fan
− Check the operation of the fan; replace if
necessary
Ignition delays with pulsating at the
burner
Burner gas pressure − Check the setting
Ignition electrode − Check the positioning and conditions
The boiler becomes dirty very quickly Combustion − Perform a combustion analysis
The burner does not start upon consent
of the boiler control
Gas valve
− Check for the presence of 120Vac voltage
on the gas valve terminals (J5 connec-
tor of main board), check wiring and
connections
The boiler does not start
No electrical power supply (no message on
the display)
− Check the electrical connections
− Check the condition of the fuse
The boiler does not arrive at temperature
Boiler dirty − Clean the combustion chamber
Burner capacity insufcient
− Check and clean the burner
− Perform a combustion check
Boiler system adjustment
− Check the parameters are set correctly
− Check the temperature setting is correct
The boiler triggers the water high limit
error
No water
− Check the water high limit is working
properly
− Check the temperature setting is correct
− Check the electrical wiring is not discon-
nected
− Check the position of the sensor
Boiler system adjustment
− Check the auto air vent is bleeding prop-
erly
− Check the heating circuit pressure
The boiler is at temperature but the heat-
ing system is cold
Presence of air in the system − Bleed the system
Pump malfunctioning
− Check/unseize the pump
− Replace the circulator
− Check the electrical connection of the
circulator
The circulator does not start Pump malfunctioning
− Check/unseize the pump
− Replace the circulator
− Check the electrical connection of the
circulator
Frequent tripping of the low water cutoff System pressure relief valve
− Check the pressure relief valve is not out
of calibration and that the low water
cutoff is functioning properly
Frequent tripping of the low water cutoff Incorrect system pressure
− Check the system pressure
− Check pressure reducer functioning
Frequent tripping of the low water cutoff Expansion tank
− Check the expansion tank is charged
properly and not ruptured