Table 3E - Troubleshooting Chart - Fault Messages - Lochinvar ArmorX2 1.3 Service Manual

3
Troubleshooting
Table 3E Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT
Flow Switch/
LWCO
Either the flow switch or the optional AUX
(will require a manual
switch is not making.
reset once condition has
been corrected. Press
the RESET button on
the display to reset.)
Blown fuse.
Condensate
Drain Blocked
The blocked drain switch has detected
(will require a manual
reset once condition has excessive condensate build up inside the
unit.
been corrected. Press
the RESET button on
the display to reset.)
Flame out of
Sequence
(will require a manual
The flame detector circuit is seeing a flame
reset once the condition
signal while no flame is present.
has been corrected.
Press the RESET button
on the display to reset.)
Gas Valve /
Connection
(will require a manual
The main control board did not detect the
reset once the condition
gas valve.
has been corrected.
Press the RESET button
on the display to reset.)
Burner Did Not
Light
The unit has failed to prove main burner
(will require a manual
ignition. It will require a manual reset before
reset once the condition
attempting to fire again.
has been corrected.
Press the RESET button
on the display to reset.)
42
DESCRIPTION
Service Manual
CORRECTIVE ACTION
• Check water heater pump operation on a call for heat.
• Check for closed valves or obstructions in the water
heater piping.
• Verify system is full of water and all air has been
purged from the system.
• Check for loose or misplaced jumpers if flow switch is
not installed.
• Replace fuse F2 on the control board, see page 38 of
this manual.
• Check condensate tube from unit to floor drain for
proper installation and obstructions.
• Inspect condensate trap for blockage.
necessary.
• Check for loose wiring connection at wire harness
plug.
• Bad blocked drain switch. Replace switch.
• Check supply voltage for proper polarity.
• Check external wiring for voltage feedback.
• Check the flame rod and make sure it is clean.
• Check the internal wiring for bad connections.
• Replace main control board.
• Check wiring harness connection at the gas valve and
at the main control board.
• Replace the gas valve wire harness.
• Replace the gas valve.
• Replace the main control board.
• Inspect spark electrode and associated wiring for
damage and connection. Reference page 35 of this
manual for removal and cleaning procedures.
Replace if necessary.
• Check for proper electrical grounding of the unit.
• Check incoming supply gas pressure. Natural gas
pressures should be between 4 - 14 inches w.c.
(1.0 - 3.5 kPa) and LP gas pressures should be
between 8 - 14 inches w.c. (2.0 - 3.2 kPa). Refer
to Section 7 - Gas Connections of the Armor X2
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.
• Check for 24 VAC to the gas valve at the 2-pin
connection on the side of the main control board
during the ignition attempt. If no voltage is present,
replace the main control board.
Clean if