Crest Audio FBN0751 Service Manual page 51

3
Troubleshooting
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT
Outlet Sensor
Differential
(will require a manual The readings from the two outlet temperature
reset once the condition
sensors are too far apart.
has been corrected. Press
the RESET button on the
display to reset.)
Flue Sensor
Differential
(will require a manual The readings from the two flue temperature
reset once the condition
sensors are too far apart.
has been corrected. Press
the RESET button on the
display to reset.)
(continued)
DESCRIPTION CORRECTIVE ACTION
• Check all connections between the outlet temperature
sensors and the control board.
connections are dry and secure.
• Check the resistance of the two outlet sensors (see
page 39).
• Replace the control board.
• Check all connections between the flue temperature
sensors and the control board.
connections are dry and secure.
• Check the resistance of the two flue sensors (see page
39).
• Replace the control board.
Service Manual
Make sure all
Make sure all
51