Lochinvar Copper-fin II/IIE 402 - 2072 - Manual (Page 36)

3
Troubleshooting
36
FAULT CAUSE CORRECTIVE ACTION
Noisy
Operation
- Gas supply problem. • Refer to the Gas Connections Section of the
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 29 and 30 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
Installation and Operation Manual.
- Dirty/damaged burner(s). • Refer to pages 28 and 29 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 the Water Connections Section of the
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 relay. • Replace relay.
- Faulty pump. • Replace pump.
- Internal fault on control board. • Check fuse F5.
• Replace main control board.
Note: Make sure the boiler 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 setpoint of temperature control.
• Check temperature rise across heat exchanger. Refer to
the temperature rise chart in the Water
Connections Section of the Installation and Operation
Manual.
Table 3D Troubleshooting Chart - Noisy System
Copper-fin II/IIE Boiler and Water Heater Service Manual