Lochinvar Armor 100 Series Service Manual page 38

3
Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT
Outlet Temp High
Rem Ctrl Flt
Service Blk
38
(continued)
DESCRIPTION
Outlet water temperature has exceeded the
maximum outlet water temperature.
External control is cycling too often.
While the unit is in Service Mode, the outlet
temperature has exceeded 185°F.
Service Manual
CORRECTIVE ACTION
• 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 the System Piping section
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.
• Check set point of the external control.
• Check the wiring between the external control and the
unit.
• Replace the control.
• 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 the System Piping section
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 the System Piping section of the
Armor Water Heater Installation and Operation Manual
for water heater pump specifications.