Camus Hydronics DynaMax DMH201 Installation And Service Manual page 50

Ignition Failed displayed on screen
Hold 109: Ignition failed
An ignition error occurs when 3 consecutive attempts at lighting the burner have failed. This is a manual reset error where the
technician must press OK to clear the error.
Check ignition speed is between
2500 to 3000 RPM using
System Monitor
YES
Check for constant spark for 6
seconds across spark igniter
YES
Check incoming gas pressure is
between 3" and 14" w.c.
YES
Turn high fire screw counter-
clockwise ¼ turn at a time
YES
Burner lights off and stays on
YES
Adjust high fire combustion to
8.5 – 9.0% CO
YES
Adjust low fire combustion to
8.0 – 8.5% CO
YES
Recheck high-fire combustion:
8.5 – 9.0% CO
NO
NO
NO
NO
NO
NO
2
NO
2
2
Adjust ignition speed
to 3000 RPM
Adjust igniter gap to
3/16" and/or clean
igniter
Check regulator for
proper static incoming
gas supply pressure
Verify gas valve is
being powered by
ignition control
Check flame sensor
for carbon deposits,
and clean if
necessary
CO < 8.5%
2
Turn high fire screw
counter-clockwise
CO < 8.0%
2
Turn low fire screw
clockwise
NO
Replace igniter and
graphite igniter
gasket
NO
Position flame sensor
so that it is closer to
the burner
NO
CO > 9.0%
2
Turn high fire screw
clockwise
NO
CO > 8.5%
2
Turn low fire screw
counter-clockwise
42