3 Troubleshooting (continued)
43
Service Manual
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Flame Failure 1
Running
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the SMART TOUCH
display to reset.)
The unit was running and lost the flame
signal.
• Inspect flame rod 1 and associated wiring for damage
and connection. Reference page 33 of this manual for
removal and cleaning procedures. Replace if necessary.
• Check for proper electrical grounding of unit.
• Check incoming supply gas pressure. Natural and
L.P. gas pressures should be between 4 - 14 inches w.c.
(1.0 - 3.5 kPa). Refer to Section 6 - Gas Connections of
the Crest Installation and Operation Manual for detailed
information concerning the gas supply.
• Verify that the plastic hose from the gas valve to the air
inlet is connected and is not damaged.
• Verify that the vent/air intake pipes are installed correctly
and there are no obstructions.
• Inspect flame sensor and associated wiring. Reference
page 33 of this manual for removal and cleaning
procedures. Replace if necessary.
• Check combustion.
• Inspect the burner. Reference page 34 of this manual for
removal and cleaning procedures. Replace if necessary.
Flame Failure 2
Running
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the SMART TOUCH
display to reset.)
The unit was running and lost the flame
signal.
• Inspect flame rod 2 and associated wiring for damage
and connection. Reference page 33 of this manual for
removal and cleaning procedures. Replace if
necessary.
• Check for proper electrical grounding of unit.
• Check incoming supply gas pressure. Natural and
L.P. gas pressures should be between 4 - 14
inches w.c. (1.0 - 3.5 kPa). Refer to Section 6 - Gas
Connections of the Crest Installation and Operation
Manual for detailed information concerning the gas
supply.
• Verify that the plastic hose from the gas valve to the air
inlet is connected and is not damaged.
• Verify that the vent/air intake pipes are installed correctly
and there are no obstructions.
• Inspect flame sensor and associated wiring. Reference
page 33 of this manual for removal and cleaning
procedures. Replace if necessary.
• Check combustion.
• Inspect the burner. Reference page 34 of this
manual for removal and cleaning procedures. Replace
if necessary.
Flame Failure 2
Transition
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the display to reset.)
The unit was running and lost the flame
during a transition from one gas valve to the
other.
• Check the transition gas valve.
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