3 Troubleshooting (continued)
Table 3F Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Gas Pressure SW
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART TOUCH
display
to reset.)
Either the manual reset low gas
pressure switch or the manual reset
high gas pressure switch tripped.
• Reset the pressure switches.
• Measure the supply gas pressure to determine cause
of failure. Natural gas pressures should be between
4 - 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.
• Correct the supply gas pressure if necessary.
• Check for a loose or misplaced jumper if pressure switches
are not installed.
Flow Switch
(will require a manual
reset once condition has
been corrected. Press
the RESET button on the
SMART TOUCH display
to reset.)
The flow switch is not making.
• 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.
Blown fuse.
• Replace fuse F2 on the control board, see page 28 of this
manual.
Blocked Drain SW
(will require a manual
reset once condition has
been corrected. Press
the RESET button on the
SMART TOUCH display
to reset.)
The blocked drain switch has
detected excessive condensate build
up inside the unit.
• Check condensate tube from unit to floor drain for proper
installation and obstructions.
• Inspect condensate trap for blockage. Clean if necessary.
• Check for loose wiring connection at wire harness plug.
• Bad blocked drain switch. Replace switch.
APS Sw
Open
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART TOUCH
display
to reset.)
The air pressure switch contacts are
open.
• 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 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 this manual for removal and
cleaning procedures. Replace if necessary.
• Inspect the heat exchanger. Reference this
manual for removal and cleaning procedures.
Replace if necessary.
• Faulty air pressure switch. Replace switch.
Service Manual
32
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