Troubleshooting - Riello Array AR 399 SE Installation, Operation And Service Manual

5.5 Troubleshooting

FAULT
There is a smell of gas
Odour of unburnt gas
Irregular combustion
Ignition delays with pulsating at the
burner
The boiler becomes dirty very quickly
The burner does not start upon consent
of the boiler control
The boiler does not start
The boiler does not arrive at temperature
The boiler triggers the water high limit
error
The boiler is at temperature but the heat-
ing system is cold
The circulator does not start
Frequent tripping of the low water cutoff
Frequent tripping of the low water cutoff
Frequent tripping of the low water cutoff
CAUSE
Gas supply circuit leaks
Flue gas circuit
Burner gas pressure
Orifice installed
Dirty burner and heat exchanger
Heat exchanger passages obstructed
Faulty fan
Burner gas pressure
Ignition electrode
Combustion
Gas valve
No electrical power supply (no message on
the display)
Boiler dirty
Burner capacity insufficient
Boiler system adjustment
No water
Boiler system adjustment
Presence of air in the system
Pump malfunctioning
Pump malfunctioning
System pressure relief valve
Incorrect system pressure
Expansion tank
43
SOLUTION
− Check the seal of the gaskets and the
pressure test ports/taps for leaks
− Check the gasket seals
− Make sure there are no obstructions
− Check the combustion quality
− Check the setting
− Check the diameter
− Clean the burner and heat exchanger
− Perform a combustion analysis
− Clean the burner and heat exchanger
− Perform a combustion analysis
− Check the operation of the fan; replace if
necessary
− Check the setting
− Check the positioning and conditions
− Perform a combustion analysis
− Check for the presence of 120Vac voltage
on the gas valve terminals (J5 connec-
tor of main board), check wiring and
connections
− Check the electrical connections
− Check the condition of the fuse
− Clean the combustion chamber
− Check and clean the burner
− Perform a combustion check
− Check the parameters are set correctly
− Check the temperature setting is correct
− 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
− Check the auto air vent is bleeding prop-
erly
− Check the heating circuit pressure
− Bleed the system
− Check/unseize the pump
− Replace the circulator
− Check the electrical connection of the
circulator
− Check/unseize the pump
− Replace the circulator
− Check the electrical connection of the
circulator
− Check the pressure relief valve is not out
of calibration and that the low water
cutoff is functioning properly
− Check the system pressure
− Check pressure reducer functioning
− Check the expansion tank is charged
properly and not ruptured
OPERATION