Lochinvar CREST 3 - Manual (Page 42)

3
Troubleshooting
42
Service Manual
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Flame Out of
Sequence 1
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the SMART TOUCH
display to reset.)
The flame detector 1 circuit is seeing a flame
signal while no flame is present.
• Check supply voltage for proper polarity.
• Check external wiring for voltage feedback.
• Check the internal wiring for bad connections.
Flame Out of
Sequence 2
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the SMART TOUCH
display to reset.)
The flame detector 2 circuit is seeing a flame
signal from burner 1.
• Check combustion of burner 1 and adjust valve 1 if
necessary.
• Check supply voltage for proper polarity.
• Check external wiring for voltage feedback.
• Check the flame rod and make sure it is clean.
• Check internal wiring for bad connections.
• Remove and inspect the burner.
Flame Failure
Running 1
(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 34 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 34 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.