Camus Hydronics DynaMax DMH081 Installation, Operation And Service Manual page 54

Blocked Flue Error displayed on screen
This error can indicate a blocked flue or blocked intake condition, low gas pressure switch tripped (optional) or high gas pressure
switch tripped (optional). To identify the safety that is open use the continuity setting on your multimeter and go across the contacts
of the switches. The safety string is powered by DC voltage and varies between 10 to 35Vdc. The blocked flue safety string begins
at J16-4 and ends at J16-2.
Is Blocked flue switch (N/C)
closed when fan is not turning?
YES
Is vent and/or air intake
blocked?
NO
High Gas Pressure Tripped?
NO
Low Gas Pressure Tripped?
NO
Turn blocked flue switch set
screw ½ turn clockwise, until
burner stays on at high fire
NO
Replace blocked flue switch
(P/N: 8021205256)
YES
Clear vent and/or
air intake
termination
High gas pressure
YES
switch (C6097B,
N/C) set to 14" w.c.
Low gas pressure
YES
switch (C6097A,
N/O) set to 3" w.c.
Check incoming
YES
gas pressure and
reset high gas
pressure switch
Check incoming
YES
gas pressure and
reset low gas
pressure switch
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