Lochinvar 1.3, 1.5 service manual Light cont’d, Flame Lost, While Running

Service Manual

3 Troubleshooting (continued)

Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT	DESCRIPTION			CORRECTIVE ACTION
			• If 24 VAC is present at the main control board, check
			the wiring between the main control board and the gas
			valve. Replace the wiring if necessary. Do not
			disconnect the wiring from the gas valve and attempt
			to measure voltage at that point. The main control
			board can detect if the gas valve is not connected and
			will display the Gas Valve / Connection fault.
			• If 24 VAC is present, check the outlet of the valve to
Burner Did Not			ensure the valve is flowing gas. With a manometer
			connected to the outlet tap of the gas valve, when the
Light (cont’d)
	The unit has failed to prove main	burner	unit is in the prepurge period, there should be a
(will require a manual
			negative pressure present. When the valve is
reset once the condition	ignition. It will require a manual reset before
			energized a change in pressure should occur. If the
has been corrected.	attempting to fire again.
			pressure change does not occur, the gas valve is not
Press the RESET button
			opening. Replace the gas valve.
on the display to reset.)
			• Inspect flame sensor and associated wiring.
			Reference page 35 of this manual for removal and
			cleaning procedures. Replace if necessary.
			• Inspect the burner. Reference page 35 of this manual
			for removal and cleaning procedures. Replace if
			necessary.
			• Replace the main control board.
			• Inspect spark electrode and associated wiring for
			damage and connection. Reference page 35 of this
			manual for removal and cleaning procedures.
			Replace if necessary.
			• Check for proper electrical grounding of unit.
			• Check incoming supply gas pressure. Natural gas
			pressures should be between 4 -			14	inches		w.c.
Flame Lost			(1.0 -	3.5	kPa) and LP gas pressures			should be
			between 8		- 14 inches w.c.	(2.0	-	3.2	kPa).
While Running
	The unit was running and lost the	flame	Refer to Section 7 - Gas Connections of the Armor X2
(will require a manual
			Installation and Operation Manual for detailed
reset once the condition	signal. This condition occurred twice .
			information concerning the gas supply.
has been corrected.
Press the RESET button			• Verify	that	the tube from the gas valve			to the air
on the display to reset.)
			inlet is connected and is not damaged.
			• Verify that the vent/air intake pipes are installed
			correctly and there are no obstructions.
			• Check for 24 VAC to the gas valve at the 2-pin
			connection on the side of the main control board
			during the ignition attempt. If no voltage is present,
			replace the main control board.

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