Lochinvar ARMOR 150 - 800 Service Manual page 30

3
Troubleshooting
Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT
Temp O/Shoot
(continued)
Rem Ctrl Flt
Parameters
Progr
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)
30
DESCRIPTION
The temperature rise across the heat
exchanger has exceeded the set parameters
for the water heater.
Outlet water temperature has exceeded the
maximum outlet water temperature.
External control is cycling too often.
After downloading parameters from a laptop,
the main control board must be reset.
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 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 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 pump is the proper size. Reference
Section 6 - System Piping of the Armor Water Heater
Installation and Operation Manual for water heater
pump specifications.
• 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.
• Check set point of the external control.
• Check the wiring between the external control and the
unit.
• Replace the control.
• Press the ENTER/RESET button on the SMART
SYSTEM display panel.
Service Manual