Service Manual

3 Troubleshooting
34
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Outlet Temp High
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 Water Heater Installation and Operation
Manual for the proper piping methods for the Armor
water heater.
• Check for 120 VAC to the water heater pump motor on
a call for heat. If voltage is not present, check wiring
back to the main control board. Replace the main
control board if necessary.
• If 120 VAC is present on a call for heat and the water
heater pump is not operating, replace the pump.
• Replace the main control board.
Rem Ctrl Flt
External control is cycling too often.
• Check set point of the external control.
• Check the wiring between the external control and the
unit.
• Replace the control.
Service Blk
While the unit is in Service Mode, the outlet
temperature has exceeded 185°F.
• Establish a heating load to remove the heat from the
water heater loop.
• 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 Water Heater Installation and Operation
Manual for the proper piping methods for the Armor
water heater.
• Check 120 VAC to the water heater pump motor on a
call for heat. If voltage is not present, check the wiring
back to the main control board. Replace the main
control board 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 water heater pump is the proper
size. Reference Section 6 - System Piping of the
Armor Water Heater Installation and Operation
Manual for water heater pump specifications.
Service Manual