Lochinvar Armor 100 Series Service Manual page 34

3
Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT
No Flame
Running
(will require a manual
The unit was running and lost the flame
reset once the condition
signal. This condition occurred four (4)
has been corrected.
straight times.
Press the RESET
button on the SMART
TOUCH display to
reset.)
34
(continued)
DESCRIPTION
Service Manual
CORRECTIVE ACTION
• Check wiring harness connection at the gas valve and
at the main control board.
• Inspect spark electrode and associated wiring for
damage and connection. Reference this manual for
removal and cleaning procedures. Replace if necessary.
• Check for proper electrical grounding of unit.
• Check incoming supply gas pressure.
pressures should be between 4 - 14 inches w.c. and
LP gas pressures should be between 8 - 14 inches w.c.
Refer to the Gas Connections section of the Armor
Water Heater Installation and Operation Manual for
detailed information concerning the gas supply.
• Verify that the plastic hose 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.
• 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.
• If 24 VAC is present at the main control board, check
the wiring between the main control board and the gas
valve. Replace the wiring if necessary.
• If 24 VAC is present, check the outlet of the valve to
ensure the valve is flowing gas. With a manometer
connected to the outlet tap of the gas valve, when the
unit is in the prepurge period, there should be a
negative pressure present.
energized a change in pressure should occur. If the
pressure change does not occur, the gas valve is not
opening. Replace the gas valve.
• Inspect flame sensor and associated wiring. Reference
this manual for removal and cleaning procedures.
Replace if necessary.
• Inspect the burner. Reference this manual for removal
and cleaning procedures. Replace if necessary.
• Replace the main control board.
Natural gas
When the valve is