Rheem OBF Series Installation Instructions Manual page 26

FIGURE 32
TROUBLESHOOTING
(see page 22 for more extensive troubleshooting solutions)
BURNER SEQUENCE OF OPERATION
T'STAT CALLS FOR HEAT
YES
IGNITOR / MOTOR START
YES
BURNER STARTS 15 SEC
FOR IGNITION
YES
FLAME ESTABLISHED,
MOTOR & IGNITOR
CONTINUE
YES
MAIN BLOWER STARTS
YES
THERMOSTAT OPENS,
HEAT CALL ENDS
YES
IGNITOR AND MOTOR
STOP / BURNER OFF
YES
MAIN BLOWER OFF
26
CHECK MAIN POWER, PRESS PRIMARY CONTROL RESET.
NO CHECK LOW VOLTAGE WIRING/CONTROLS
CHECK FOR FALSE LIGHT ON CAD CELL
CHECK FUEL SUPPLY, OIL LINES, OIL LINE VALVES, TRIAL
CHECK OIL NOZZLE,
NO
CHECK PRIMARY CONTROL / CAD CELL,
CHECK IGNITION TRANSFORMER / ELECTRODES
CHECK ELECTRODES, IGNITION TRANSFORMER,
CHECK FUEL SUPPLY, NOZZLE
NO
CHECK CAD CELL / PRIMARY CONTROL
CHECK FAN CENTER
CHECK BLOWER MOTOR WIRING
NO
CHECK BLOWER MOTOR CAPACITOR
CHECK THERMOSTAT AND CONTROL WIRING.
CHECK ISOLATION RELAY
NO
CHECK PRIMARY CONTROL
NO CHECK PRIMARY CONTROL
NO CHECK FAN CENTER AND WIRING