Page 17
•
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 ignitor and connections.
Then reset the fault by switching the service switch or the remote
panel switch OFF then ON again if the ignitor is open or by the service
switch only if the ignitor is shorted.
•
The remote panel switch does not reset a short circuit fault.
3.13.
5
- Combustion Fan
•
The combustion fan is open circuit or shorted.
•
The burner will shut down.
•
The diagnostic code,
5
will be displayed.
•
The buzzer will sound for 10 seconds.
•
The control board will purge with the circulating pump for two
minutes.
•
In order to restart the burner, check the combustion fan. Then reset
the fault by switching the service switch or the remote panel switch
OFF then ON again if the combustion fan is open, or by the service
switch only if the combustion fan has shorted.
•
The remote panel switch does not reset a short circuit fault.
3.14.
6
- Water Pump
The water pump is shorted.
•
The burner will shut down.
•
The diagnostic code,
6
will be displayed.
•
The buzzer will sound for 10 seconds.
•
The control board will purge with the combustion fan for two minutes.
•
In order to restart the burner, check the water pump. Then reset the
fault by switching the service switch OFF then ON again.
•
The remote panel switch does not reset a short circuit fault.
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...