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3 Troubleshooting
48
Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Internal Fault
The main control board has detected an
internal fault.
• Replace the main control board.
Writing to
Memos
The main control board has detected an
internal fault.
• Replace the main control board.
CRC Parameters
The main control board has detected an
internal fault.
• Replace the main control board.
No Error Stored
The main control board has detected an
internal fault.
• Press the RESET button on the SMART
TOUCH display panel.
Flue Temp
Shutdown
The stack temperature has exceeded the
set parameters for the water heater.
• Inspect the heat exchanger. Reference page 36 of
this manual for the procedure on how to clean the
flue side of the heat exchanger.
• Inspect the flue sensor and associated wiring.
Measure the resistance of the flue sensor and
compare to Table 3C on page 40 of this manual.
Replace the sensor if necessary.
• Verify that the vent/air intake pipes are properly
installed and that there are no obstructions.
• Replace the main control board.
Delta T
Shutdown
The temperature rise across the heat
exchanger has exceeded the set parameters
for the water heater.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the heater is piped properly into the heating
system. Refer to Section 6 - System Piping of the
Armor X2 Installation and Operation Manual
for the proper piping methods for the Armor X2 water
heater.
• Check for voltage to the water heater pump motor
on a call for heat. If voltage is not present, check
the wiring back to the pump relay. Replace the pump
relay if necessary.
• If 120 VAC is present on a call for heat and the water
heater pump is not operating, replace the pump.
• Verify that the water heater pump is set to the proper
speed or that the pump is the proper size. Reference
Section 6 - System Piping of the Armor X2 Water
Heater Installation and Operation Manual for water
heater pump specifications.
Outlet Temp
Shutdown
Outlet water temperature has exceeded the
maximum outlet water temperature.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the water heater is piped properly into the
heating system. Refer to Section 6 - System Piping
of the Armor X2 Installation and Operation Manual
for the proper piping methods for the Armor X2 water
heater.
• Check for voltage to the water heater pump motor on
a call for heat. If voltage is not present, check wiring
back to the pump relay. Replace the pump relay if
necessary.
• If 120 VAC is present on a call for heat and the heater
pump is not operating, replace the pump.
Service Manual