Camus Hydronics DynaMax DMH081 Installation, Operation And Service Manual page 49

SYMPTOM
• The boiler has failed to ignite
Flame Failure
(Pressing the
manual RESET
on the DynaMax
Control Panel will
be required to
restart the ignition
sequence)
• The DynaMax boiler was
Flame
Disappears
During a Run
Cycle
(Pressing the
manual RESET
on the DynaMax
Control Panel will
be required to
restart the ignition
sequence)
FAILURE MODE
the burner after 3 unsuccessful
attempts
running and flame signal
suddenly disappeared. This
condition occurred 3 times.
ANALYSIS
• Verify that all air has been purged from gas line
• Inspect spark electrode and related wiring for
damage and connection errors
• Verify that the ignition fan speed is set to 3000 RPM
through fan diagnostics screen.
• Verify that boiler is properly grounded
• Verify incoming gas supply pressure and that it
coincides with Table 9.
• Verify that the vent/ air inlet piping (if equipped) are
correctly installed and obstructions are not present.
• Verify 120 VAC and 24 VAC is being supplied to the
gas valve transformer from the DynaMax Controller
during ignition. Check wiring from DynaMax
Controller, Gas Valve Transformer and Gas Valve
Relay. If a signal cannot be detected, the DynaMax
Controller needs to be replaced
• If 24 VAC is present, check the outlet of the valve to
ensure that gas is flowing. With a manometer
connected to the outlet pressure tap of the gas
valve a negative pressure should be present during
pre-purge. When the valve is energized a change in
pressure should occur, if no change is detected the
gas valve has failed to open or it is passing
insufficient amount of gas. If this is an initial startup
increase the low fire gas setting by ¼ turn
clockwise.
• Inspect flame sensor and associated wiring. Replace
if necessary
• Inspect the burner. Refer to Burner Maintenance in
section 11.7
• Replace the DynaMax Controller
• Verify that minimum fan speed is greater than 2500
RPM
• Verify that all air has been purged from gas line
• Inspect spark electrode and related wiring for
damage and connection errors.
• Verify that boiler is properly grounded
• Verify incoming gas supply pressure and that it
coincides with Table 9.
• Verify that the gas line connections to the boiler are
adequate
• Verify that the vent/ air inlet piping (if equipped) are
correctly installed and obstructions are not present
• Verify 120 VAC is being supplied to the transformer
from the DynaMax Controller during ignition. If a
signal cannot be detected, the DynaMax Controller
needs to be replaced
• Verify that 24 VAC is being supplied to the gas valve
during ignition. If a signal cannot be detected, the
transformer needs to be replaced
• Inspect flame sensor and associated wiring. Replace
if necessary
• Inspect the burner. Refer to Burner Maintenance in
section 11.7
• Replace the DynaMax Controller if necessary
44