Table 3D - Troubleshooting Chart - Noisy System - Lochinvar Armor 150 - 500 Service Manual

3
Troubleshooting
Table 3D Troubleshooting Chart - Noisy System
FAULT
- Supply gas problem. Natural gas pressures
should be between 4 inches w.c. and
14 inches w.c.
be
14 inches w.c.
- Gas/air mixture problem.
Noisy
Operation
- Dirty/damaged burner.
- Low water flow through the heat exchanger.
- Air in the piping system.
- Low system water pressure.
- Blown fuse.
No Pump - Faulty pump.
Operation
- Faulty pump relay.
- Internal fault on control board.
Relief Valve
- System pressure exceeds relief valve
Opening setting.
APS
Open
(will require a
manual reset once the
Air pressure switch contacts are open.
condition has been
corrected. Press the
RESET button on the
SMART SYSTEM
display to reset.)
24
CAUSE
LP gas pressures should
between 8 inches
CORRECTIVE ACTION
• Refer to Section 7 - Gas Connections of the Armor
Water Heater Installation and Operation Manual for
w.c. and detailed information concerning the gas supply.
• Refer to the Gas Valve Adjustment Procedure on
page 33 of this manual for the proper gas valve setting.
Verify that the vent/air intake lengths do not exceed the
maximum listed in the General Venting section of the
Armor Water Heater Installation and Operation Manual.
• Refer to page 19 in this manual for the burner removal
and inspection procedure. Clean or replace the burner
as necessary.
• Refer to Section 6 - System Piping of the Armor Water
Heater Installation and Operation Manual for minimum
flow rates.
• Properly purge all air from the piping system.
• Verify system pressure is a minimum of 12 PSI.
• Replace fuse F5 on the control board, see page 21 of
this manual.
• Replace pump.
• Replace pump relay.
• Replace main control board.
• Lower the system pressure below the 150 PSI rating of
the supplied relief valve.
• Check the wiring connections to switch. Wires should
be connected to the common and normally closed
terminals.
• Air intake lengths exceed the maximum allowed
lengths. Refer to Section 3 - General Venting of the
Armor Water Heater Installation and Operation Manual
for proper lengths.
• Check for obstruction or blockage in the air
intake pipes or at terminations.
• Check reference hoses connected to the air pressure
switch for blockage or obstruction.
• Inspect the burner. Reference page 19 of this manual
for removal and cleaning procedures.
necessary.
• Inspect the heat exchanger. Reference page 20 of this
manual for removal and cleaning procedures. Replace
if necessary.
• Faulty air pressure switch. Replace switch.
Service Manual
Replace if