Lochinvar Crest w/RealTime O2 Trim 100 Series User Manual

3 Troubleshooting (continued)
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT DESCRIPTION CORRECTIVE ACTION
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 boiler is piped properly into the heating
system. Refer to Section 5 - Hydronic Piping of the
Crest Installation and Operation Manual
for the proper piping methods for the Crest boiler.
• Check for voltage to the boiler 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 boiler
pump is not operating, replace the pump.
Writing/
Programming
EEProm Error
The main control board has detected an
internal fault.
• Turn power OFF and back ON.
• Replace the main control board.
CRC Parameter
Error
The main control board has detected an
internal fault.
• Turn power OFF and back ON.
• Replace the main control board.
Wrong Error
Code
The main control board has detected an
internal fault.
• Press the RESET button on the SMART TOUCH
display panel.
Flame Sense Out
of Sequence 1
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
display to reset.)
Flame Sensor 1 senses a flame while the
gas valve is turned off.
• Clean Flame Sensor 1.
• Replace control board.
Flame Sense Out
of Sequence 2
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
display to reset.)
Flame Sensor 2 senses a flame while the
gas valve is turned off.
• Clean Flame Sensor 2.
• Replace control board.
Flue Damper
Switch Open
The flue damper proving switch is not closed
when the flue damper is energized.
• Check that the flue damper is connected to the 3-pin
connector on the rear of the boiler.
• Check the wiring between the flue damper connector
and the control board.
• Check for 24VAC from the output of the flue damper
transformer when the fan is running.
• Check for 120VAC from the output of the flue damper
transformer when the fan is running.
• Check the wiring between the flue damper transformer
and the control board.
• Check fuse F4 on the control board.
• Replace the flue damper.
• Replace the control board.
Service Manual
53

Lochinvar Crest w/RealTime O2 Trim 100 Series Specifications

General

Brand	Lochinvar
Model	Crest w/RealTime O2 Trim 100 Series
Category	Boiler
Language	English