Troubleshooting continued, Fault, Description

Service Manual

3 Troubleshooting (continued)

Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT	DESCRIPTION	CORRECTIVE ACTION

		• Inspect flame rod 2 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.
Flame Failure		(1.0 - 3.5 kPa). Refer to Section 6 - Gas Connections of
Flame Failure		the Crest Installation and Operation Manual for detailed
Running 2		the Crest Installation and Operation Manual for detailed
Running 2		information concerning the gas supply.
(will require a manual		information concerning the gas supply.
(will require a manual	The unit was running and lost the flame	• Verify that the plastic hose from the gas valve to the air
reset once the condition	The unit was running and lost the flame
has been corrected. Press	signal.	inlet is connected and is not damaged.
the RESET button on the		• Verify that the vent/air intake pipes are installed correctly
SMART TOUCH display		and there are no obstructions.
to reset.)		• Inspect flame sensor and associated wiring. Reference
		• 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.

Gas Valve / Relay
Failure 1		• Check wiring harness connection at the gas valve and
(will require a manual	The main control board did not detect gas	at the main control board.
reset once the condition	The main control board did not detect gas	• Replace the gas valve wire harness.
has been corrected. Press	valve 1.	• Replace the gas valve.
the RESET button on the		• Replace the gas valve.
SMART TOUCH display
to reset.)

Gas Valve / Relay
Failure 2		• Check wiring harness connection at the gas valve and
(will require a manual	The main control board did not detect gas	at the main control board.
reset once the condition	The main control board did not detect gas	• Replace the gas valve wire harness.
has been corrected. Press	valve 2.	• Replace the gas valve.
the RESET button on the		• Replace the gas valve.
SMART TOUCH display
to reset.)

Lochinvar 2.5, 1.5, 3.5 Troubleshooting continued, Fault, Description, Corrective Action

Models: 3.5 2.5 1.5