Troubleshooting guide

Page 3
Troubleshooting Flow Charts for the SCF-050
The Trouble shooting Flow Charts for the following components will be referenced from
Section B of this Service Manual to eliminate duplicating the charts:
Digital Control Board
Please refer to page 100 of the original Digital Control Board Service Manual.
Combustion Blower
Please refer to page 103 of the original Digital Control Board Service Manual.
Vacuum Switch
Please refer to page 103 of the original Digital Control Board Service Manual.
Proof of Fire Switch
Please refer to page 106 of the original Digital Control Board Service Manual.
Troubleshooting Flow Charts
Convection Blower
The Convection Blower in the SCF-050 is a 2-speed Blower. The Low speed is 600 CFM
and the High speed is 800 CFM. The Blower runs with the aid of a Capacitor. The
Fan/Limit Control controls the Blower. The Fan/Limit Control has adjustable settings to
operate the blower at different temperature settings.
NOTE: A Blower problem can sometimes be traced back to loose wiring connections
at the Capacitor. Check the brown wires that are connected to the Capacitor for
loose connections. Use caution when handling Capacitors.