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3.6
TROUBLESHOOTING
Maintenance operations must be carried out by an authorised company (e.g. Authorised After-Sales Technical Assistance Cen-
tre).
Trouble
Smell of gas
Repeated ignition blocks
Irregular combustion or
noisiness
Non-optimal ignition of
first ignitions of the
burner.
Frequent trips of the
overheating safety device
thermostat function.
Siphon blocked
Heat exchanger blocked.
Abnormal noises in the
system
Abnormal noises in the
condensation module
Poor production of
D.H.W.
68
Possible causes
Caused by leakage from gas circuit pipe-
lines.
No gas. Condensate drain clogged.
Dirty burner, clogged primary heat ex-
changer, incorrect combustion parame-
ters, intake-exhaust terminal not correctly
installed.
The first ignitions of the burner (after cali-
bration) may not be optimal.
Lack of water in the appliance, little water
circulation in the system or blocked pump
(Par. 1.29).
Dirt or combustion products deposited in-
side.
Obstruction of the siphon.
Air in the system.
Air in the module.
Clogged condensing module or D.H.W. ex-
changer.
Check sealing efficiency of gas intake circuit.
Check the presence of pressure in the network and that the gas adduction
cock is open. Restore/release the function of the condensate drain,
checking that the condensate has not affected: combustion components,
fan and gas valve. Check the function of the condensate sensor.
Check the indicated components.
The system automatically adjusts the burner ignition until the best
ignition conditions are found.
Check on the pressure gauge that the system pressure is within estab-
lished limits. Check that the radiator valves are not closed and also the
functionality of the pump.
Check that there are no residues of material blocking the flow of
condensate.
Check that there are no residues of material blocking the flow of
condensate.
Check the opening of the cap of the air vent valve (Par. 1.31). Make sure
the system pressure and expansion vessel pre-charge values are within
the set limits. The factory-set pressure values of the expansion vessel
must be 1.0 bar, the value of system pressure must be between 1 and 1.2
bar.
Use the manual air vent valve (Par. 1.31) to eliminate any air present in
the condensation module. When the operation has been performed,
close the manual vent valve.
Contact After-Sales Assistance Service that has procedures to clean the
module or D.H.W. heat exchanger.
Solutions
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