Lochinvar Power-fin 1701 - Manual (Page 34)

3
Troubleshooting
34
Service Manual
FAULT CAUSE CORRECTIVE ACTION
Noisy
Operation
- Gas supply problem. • Refer to Section 3 - Gas Connections of the Power-fin
Installation and Operation Manual for detailed
information concerning the gas supply.
- Gas/air mixture problem. • Refer to the Checking Manifold Gas Pressure and
Combustion Analysis Procedure on pages 27 and 28 of
this manual for the proper settings. Verify
that the vent/air intake lengths do not exceed the
maximum listed in the Venting section of the Power-fin
Installation and Operation Manual.
- Dirty/damaged burner. • Refer to page 26 in this manual for the burner removal
and inspection procedure. Clean or replace the burner
as necessary.
- Low water flow through the heat exchanger. • Refer to Section 4 - Water Connections of the
Power-fin Installation and Operation Manual for
minimum flow rates. Verify that the appliance is piped in
a primary/secondary fashion and that the appliance and
system pump are running on a call for heat.
- Air in the piping system. • Properly purge all air from the piping system.
- Low system water pressure. • Verify system pressure is a minimum of 12 PSI.
No Pump
Operation -
Boiler Pump
System Pump
or
DHW Pump
- Faulty pump. • Replace pump.
- Internal fault on control board.
• Replace main control board.
Note: Make sure the pump horse power (hp) does not
exceed 1 hp.
Relief Valve
Opening
- System pressure exceeds relief valve
setting.
• Lower the system pressure below the rating of
the supplied relief valve or replace the standard relief
valve with a higher rated valve up to the maximum
pressure of the heat exchanger.
- Improperly sized expansion tank. • Install properly sized expansion tank.
- Outlet water temperature in excess of 210°.
• Check set point of temperature control.
• Check temperature rise across heat exchanger. Refer to
the temperature rise chart in Section 4 - Water
Connections of the Power-fin Installation and Operation
Manual.
Table 3E Troubleshooting Chart - Noisy System