Lochinvar 2072 Troubleshooting, Fault, Description, Corrective Action, No Flame Ign, Flame CKT

Copper-fin II/IIE Boiler and Water Heater Service Manual

3 Troubleshooting

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

FAULT	DESCRIPTION	CORRECTIVE ACTION
	The unit has failed to prove burner flame	• Inspect igniter and associated wiring for damage and
	upon ignition.	connection.	Reference page 27 of this manual for
		removal and cleaning procedure.		Replace	if
		necessary.
		• Check for proper electrical grounding of unit.
		• Check incoming supply gas pressure. Refer to the
		Gas Connections Section in the Installation and
		Operation Manual for detailed information concerning
		the gas supply.
		• Verify that the tube from the gas valve to the combustion
		air chamber is connected and is not damaged.
No Flame Ign		• Verify that the vent/air intake pipes are correctly
(Will require a manual		installed and that there are no obstructions.
reset. Press the RESET
button on the SMART		• Inspect the	burners. Reference pages	28 and	29
SYSTEM display to reset.)		of this manual for removal and cleaning procedures.
		Replace if necessary.
		• Refer to the Checking Manifold Gas Pressure and
		Combustion Analysis Procedure on pages 29 and 30
		of this manual for the proper settings.
		• Check for 24 VAC to the gas valve during the ignition
		attempt. If no voltage is present, check the wiring
		between the gas valve and the main control board.
		• Replace the wiring or the main control board as
		necessary.

HSI Current Low	Amp draw of the hot surface igniter did not	• Measure the amp draw of the hot surface igniter during
(Will require a manual	meet the minimum requirement of 2.6 amps.	the trial for ignition stage. If less than 2.6 amps
reset once the condition		replace the hot surface igniter.
has been corrected. Press		• If more than 2.6 amps replace the control module.
the RESET button on the
SMART SYSTEM display
to reset.)
Flame CKT	The main control board has detected an	• Replace the main control board.
	internal fault.
Error

38