Metos 72/02CG, Installation And Operation Manual

Page: 45 / 72

2.9.2003 Rev. 1.0
Troubleshooting
39
7. Troubleshooting
Users are not allowed to perform any maintenance operations on any parts of this appli-
ance. Maintenance should be carried out by an authorized technician.
TROUBLE POSSIBLE CAUSES WHAT TO DO
FOR THE USER FOR THE INSTALLER
OPEN BURNERS
Pilot burner won’t
light: pressure drop in gas supply
pipe contact the gas utility compa-
ny;
nozzle clogged; remove any dirt from the noz-
zle;
gas valve damaged; replace it;
After releasing the
knob, the pilot burner
goes out: gas valve knob not pressed
down firmly or long enough
to heat the thermocouple. repeat the lighting procedure;
thermocouple faulty; replace it;
gas valve damaged; replace it;
Pilot flame stays lit, but
burner won’t light: pressure drop in gas supply
pipe contact the gas utility compa-
ny;
nozzle clogged; remove any dirt from the noz-
zle;
gas valve damaged; replace it;
the gas outlet holes on the
burner crown are clogged; clean the crown;
burner components are not
properly placed one on top
of the other; place them properly;
When turning the open
burner ignition knob
from high to low, the
burner goes out: minimum output too low; adjust minimum output (see
chapter "Adjusting minimum
output" in "Adjustment in-
structions" section).