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the battery. The ground wire should be a minimum 10 gauge and
connected directly to the battery.
3.10.
2
- Fuse Blown
One of the fuses on the control board has blown.
•
The burner will shut down.
•
The diagnostic code,
2
will be displayed.
•
The buzzer will sound for 10 seconds.
•
The control board will purge the system with the combustion fan and
circulating pump for two minutes while it is checking for a blown fuse.
•
If a blown fuse exists, the diagnostic code
2
will continue to be
displayed.
•
In order to restart the burner, replace any blown fuses with one of
the proper size. Then reset the fault by switching the service switch
or the remote panel switch OFF then ON again.
3.11.
3
- Fuel Pump/Solenoid
The fuel pump or fuel solenoid has shorted.
•
The burner will shut down.
•
The diagnostic code,
3
will be displayed.
•
The buzzer will sound for 10 seconds.
•
The control board will purge the system with the combustion fan and
circulating pump for two minutes.
•
In order to restart the burner, check the fuel pump and solenoid for a
short circuit. Then reset the fault by switching the service switch OFF
then ON again.
The remote panel switch does not reset short circuit faults.
3.12.
4
- Ignitor
The ignitor is open or shorted
•
The burner will shut down.
•
The diagnostic code,
4
will be displayed.
Summary of Contents for SCH25
Page 6: ...Page 2...
Page 9: ...Page 5 BURNER COUNTERFLOW TUBE COMBUSTION CHAMBER NOZZLE...
Page 16: ...Page 12 Figure 3 Wiring Diagram...
Page 34: ...Page 30...
Page 41: ...Page 37 Appendices Appendix 1 Technical Bulletins...