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3
Troubleshooting
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT
Outlet Temp
Outlet water temperature has exceeded the
Shutdown
maximum outlet water temperature.
Writing/
The main control board has detected an
Programming
internal fault.
EEProm Error
CRC Parameter
The main control board has detected an
Error
internal fault.
Wrong Error
The main control board has detected an
Code
internal fault.
Flame Sense Out
of Sequence 1
(will require a manual
Flame Sensor 1 senses a flame while the
reset once the condition
gas valve is turned off.
has been corrected. Press
the RESET button on the
display to reset.)
Flame Sense Out
of Sequence 2
(will require a manual
Flame Sensor 2 senses a flame while the
reset once the condition
gas valve is turned off.
has been corrected. Press
the RESET button on the
display to reset.)
Flue Damper
The flue damper proving switch is not closed
Switch Open
when the flue damper is energized.
(continued)
DESCRIPTION
CORRECTIVE ACTION
• 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
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.
• Turn power OFF and back ON.
• Replace the main control board.
• Turn power OFF and back ON.
• Replace the main control board.
• Press the RESET button on the SMART TOUCH
display panel.
• Clean Flame Sensor 1.
• Replace control board.
• Clean Flame Sensor 2.
• Replace control board.
• 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
Operation
Manual
53
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