Lochinvar SMART SYSTEM 502 - 2072 - Manual (Page 36)

3
Troubleshooting
36
FAULT DESCRIPTION CORRECTIVE ACTION
No Flame Ign
(Will require a manual
reset. Press the RESET
button on the SMART
SYSTEM display to reset.)
The unit has failed to prove burner flame
upon ignition. • Inspect igniter and associated wiring for damage and
connection. Reference page 25 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.
• Verify that the vent/air intake pipes are correctly
installed and that there are no obstructions.
• Inspect the burners. Reference pages 26 and 27
of this manual for removal and cleaning procedures.
Replace if necessary.
• Refer to the Checking Manifold Gas Pressure and
Combustion Analysis Procedure on pages 27 and 28
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
(Will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM
display
to reset.)
Amp draw of the hot surface igniter did not
meet the minimum requirement of 2.6 amps. • Measure the amp draw of the hot surface igniter during
the trial for ignition stage. If less than 2.6 amps
replace the hot surface igniter.
• If more than 2.6 amps replace the control module.
Flame CKT
Error
The main control board has detected an
internal fault. • Replace the main control board.
Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface
Copper-fin II/IIE Boiler, Water Heater and Pool Service Manual