Model 201CRD & 301CRD Advanced oil burners — Instruction manual
Carlin part number MN2301 Rev. 04/12/04
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Start-up & operation
Do not start the burner if the combustion
chamber contains oil or oil vapor.
Per UL requirements, the control will not turn
on if the cad cell senses flame during the
self-test. If the cad cell sees light (flame) at the
beginning of a cycle, the control will wait until
it no longer senses the problem.
Service & Troubleshooting
Burner (control) will not come on
No power to control
• Check line voltage to the control (at least 102 VAC).
• Check all electrical connections.
Control is in lockout
• Press the reset button for 3 seconds.
CAD cell seeing light
• Remove one lead from FF terminal on the control. Press and hold
the reset button for 3 seconds. If voltmeter shows power between
control white and black wires, and T-T circuit is closed, but control
does not start, replace the control.
If control starts when receiving power on the black wire and T-T
circuit is closed, check for:
• light is leaking into the burner housing, OR
• CAD cell is defective, OR
• there is a problem with the CAD cell wiring or holder.
• If appliance was recently shut down, CAD cell may see residual
hot spots in chamber.
To troubleshoot:
• Check CAD cell by unplugging it and measuring the resis-
tance across its pins: dark resistance at least 50 KOHMS; room
light resistance less than 10 KOHMS. Replace if necessary. If
the CAD cell functions properly, reinstall the cell and close the
burner housing.
• Check for stray light by measuring the CAD cell resistance
looking into the inactive combustion chamber. It should read
at least 50 KOHMS.
Control will not reset
• If the control will not reset, the Safety Monitoring Circuit may be
detecting an internal control problem. Replace the control.
Repeated flame failures (burner lights, but shuts
down)
Check for:
• CAD cell is defective.
• Air leaking into oil line causing flame out — Check oil line con-
nections and filter gasket.
• Defective nozzle causing flame to be erratic — Change nozzle.
• Excessive airflow or draft causing flame to leave burner head
Check for proper air shutter setting and draft.
• Excessive back pressure causing flame to be erratic — Check
appliance and flue for sooting/plugging.
Control locks out after TFI
Check for:
• No oil to burner — Check oil supply, filter, lines.
• Shorted electrodes — Inspect for cracked porcelain and replace
as needed.
• Poor spark — Check electrode spacing and condition per burner
manual. Replace or realign if necessary.
• Nozzle clogged — Replace nozzle.
• Airflow too high — Check air shutter setting.
• Ignitor module defective — Replace if no spark.
• CAD cell defective.
• Oil valve stuck in closed position.
• Check wiring connections.
Power ON Open all manual oil line valves. Close the line
switch.
Reset Press and hold the reset button for 3 seconds,
then release. This will reset the control at any
time during its operation.
Stand-by (No call for heat) Control waits for power to be
applied to the black wire (from appliance limit
circuit).
Call for heat Set thermostat (or limit) to call for heat. Thermo-
stat circuit must be closed and power coming to
black wire from limit circuit.
Burner on The ignitor and motor start. Four seconds later,
the electronic time delay relay allows the oil valve
to open.
TFI The cad cell must sense flame within the control’s
trial for ignition (TFI) timing — 15 seconds for
40200 control. After cad cell senses flame, the
ignitor stays on another 10 seconds (flame sta-
bilization period).
Run The burner continues firing during call for heat
if the cad cell is sensing flame.
Lockout If cad cell does not sense flame within the TFI
timing (15 seconds), lockout occurs.
To Reset Push in and hold reset button for 3 seconds, then
release. This will reset control at any time during
operation.
Flame failure If the cad cell loses flame signal during operation
(after the TFI), the burner shuts off within 1.3
seconds. Recycle: After 60 to 90 seconds the
control will restart (Burner on mode).
Burner off Set thermostat (or aquastat) to stop call for heat.
The burner shuts off within 2 seconds after end
of call for heat.
Stand-by Control remains in stand-by mode until limit
circuit sends power to the black wire and T-T
circuit closes (call for heat).
Power loss If power to control/burner is interrupted during a
normal run cycle, the control will begin a normal
cycle again after power is restored.
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