Lochinvar 150 - 800 3Troubleshooting, Fault, Description, Corrective Action, Temp O/Shoot, Progr

Service Manual

3Troubleshooting

Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT	DESCRIPTION	CORRECTIVE ACTION
	The temperature rise across the heat	• Verify that the system is full of water and that all air
	exchanger has exceeded the set parameters	has been properly purged from the system.
	for the water heater.	• 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
Temp O/Shoot		speed or that the pump is the proper size. Reference
		Section 6 - System Piping of the Armor Water Heater
(continued)		Installation and Operation Manual for water heater
		pump specifications.
	Outlet water temperature has exceeded the	• Verify that the system is full of water and that all air
	maximum outlet water temperature.	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.
	External control is cycling too often.	• Check set point of the external control.
Rem Ctrl Flt		• Check the wiring between the external control and the
		unit.
		• Replace the control.
Parameters	After downloading parameters from a laptop,
Progr		• Press the ENTER/RESET button on the SMART
(will require a manual	the main control board must be reset.	SYSTEM display panel.
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)

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