86
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3.7 TROUBLESHOOTING
Maintenance operations must be carried out by an authorised company (e.g. Authorised Aer-Sales Technical Assistance Cen-
tre).
Trouble Possible causes Solutions
Smell of gas
Caused by leakage from gas circuit pipe-
lines.
Check sealing eciency of gas intake circuit.
Repeated ignition blocks No gas. Condensate drain clogged.
Check the presence of pressure in the network and that the gas adduction
valve is open. Restore the function of the condensate drain, checking that
the condensate has not aected: combustion components, fan and gas
valve. Check the function of the condensate sensor.
Irregular combustion or
noisiness
Dirty burner, clogged primary heat ex-
changer, incorrect combustion parame-
ters, intake-exhaust terminal not correctly
installed.
Check the indicated components.
Frequent trips of the
overheating safety device
thermostat function.
Lack of water in the appliance, little water
circulation in the system or blocked pump
(Parag. 1.32).
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.
Siphon blocked
Dirt or combustion products deposited in-
side.
Check that there are no residues of material blocking the ow of
condensate.
Heat exchanger blocked.
is may be caused by the drain trap being
blocked.
Check that there are no residues of material blocking the ow of
condensate.
Abnormal noises in the
system
Air in the system.
Make sure the system pressure and expansion tank factory-set pressure
values are within the set limits. e factory-set pressure values of the
expansion vessel must be 1bar (100 kPa), the value of system pressure
must be between 1 and 1.2 bar.
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