Lochinvar Power-fin 1701 - Manual (Page 37)

3
Troubleshooting
(continued)
Service Manual
37
FAULT DESCRIPTION CORRECTIVE ACTION
No Flame
Running
(Will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)
The unit was running and lost the flame signal. • 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
Section 3 - Gas Connections of 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 installed
correctly and there are no obstructions.
• Refer to the Checking Manifold Gas Pressure and
Combustion Analysis Procedure on pages 27 and 28
of this manual for the proper settings.
• Inspect the burner. Reference page 26 of this
manual for removal and cleaning procedures.
Replace if necessary.
• Replace the main control board.
Auto Reset
High Limit
The outlet water temperature has exceeded the
fixed setting of the automatic reset high limit. • Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the appliance is piped properly into the
heating system. Refer to Section 4 - Water
Connections of the Power-fin Installation and
Operation Manual for the proper piping methods
for the Power-fin.
• Check 120 VAC to boiler pump motor on a call for
heat. If voltage is not present, check wiring back
to the main control board. Replace the main
control board if necessary.
• If 120 VAC is present on a call for heat and the
pump is not operating, replace the pump.
• If the system pump is a variable speed pump,
ensure that the system flow is not less than the
boiler flow.
• Check temperature setting of the main control
board.
• Check resistance of water sensors and compare to
Table 3B on page 33 of this manual. Replace
sensor if necessary.
• Replace high limit.
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface