Operator's Manual: Models CB-3500 & CB-5000
10-3
PROBLEM
POSSIBLE CAUSE(S)
POSSIBLE ACTION(S)
Burner won’t run at all and
Green power light is NOT ON.
1. Circuit breaker/main switch open.
2. Fuse/breaker blown.
3. Burner cable is damaged or not
plugged in properly.
1. Close circuit breaker/switch.
2. Electrician should check out
electrical system.
3. Check burner cable.
Burner won’t run at all and
Green power light is ON.
1. Oil primary control has shut down
on safety reset.
2. Wall thermostat is not operating.
3. Heater block is not heating up.
4. F-120 proving switch has not
closed.
5. Oil primary control terminals are
not wired correctly.
6. Oil primary control is damaged.
7. The L-200 or L-290 limit switches
have opened.
1. Follow the directions in Section 7
to reset the oil primary control.
2. Check the wall thermostat and
thermostat cable.
3. Feel the back of the burner; it
should be 140 degrees F. If the
heater block is NOT HOT: (a) Wait
15 minutes for the heater block
to heat up and re-check the back
of the burner, and (b) Check the
block heater thermostat and block
heater element. Refer to the wiring
diagram and ladder schematic in
Appendix B.
4. If the block is HOT: (a) Check
the red wire at the F-120 proving
switch for power. If there is NO
power at the red wire, refer to
the wiring diagram and ladder
schematic in Appendix B to
troubleshoot the circuit that
provides power to the proving
switch. (b) If there is power at the
red wire at the proving switch,
check for power at the black wire.
If there is NO power at the black
wire, replace the F-120 proving
switch.
5. Check the oil primary control:
(a) Check that the “F” terminals
are NOT jumped. (b) Check that
the two yellow cad cell wires are
connected to the “F” terminals.
(c) Check that the two thermostat
wires are connected to the “T”
terminals.
6. Replace oil primary control: (a)
Check voltage – it must be 115
volts.
7. Test the switch for power. Note
that power should be indicated
on both sides of the switch. See
Section 7.
Summary of Contents for CB-3500 series
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