Lochinvar Power-fin 502 Service Manual page 36

3
Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface
F F A A U U L L T T
The unit has failed to prove main burner
flame upon ignition.
No Flame Ign
(Will require a manual
reset. Press the RESET
button on the SMART
SYSTEM display to reset.)
HSI Current Low
Amp draw of the hot surface igniter did not
(Will require a manual meet the minimum requirement of 2.6 amps.
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)
The main control board has detected an
Flame CKT
internal fault.
Error
36
D D E E S S C C R R I I P P T T I I O O N N C C O O R R R R E E C C T T I I V V E E A A C C T T I I O O N N
• Inspect igniter and associated wiring for damage and
connection. Reference page 25 of this manual for
removal and cleaning procedure.
necessary.
• Check for proper electrical grounding of unit.
• Check incoming supply gas pressure.
Section 3 - Gas Connections in the Power-fin
Installation and Operation Manual for detailed
information concerning the gas supply.
• Verify that the tube from the gas valve to the air inlet is
connected and is not damaged.
• Verify that the vent/air intake pipes are correctly
installed and that there are no obstructions.
• Inspect the burner. Reference page 26 of this manual
for removal and cleaning procedures.
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 120 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.
• Measure the amp draw of the hot surface igniter during
the trial for ignition stage.
replace the hot surface igniter.
• If more than 2.6 amps replace the control module.
• Replace the main control board.
Service Manual
Replace if
Refer to
Replace if
If less than 2.6 amps