Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 4, Page 39
Troubleshooting
Charts
Chart No. 1 - Thermostat calling for heat;
Burner motor never attempts to run.
Determine and correct the
reason the backflow sensor
was activated. Once the
problem has been corrected,
push the manual reset button
on the backflow sensor and
follow the instructions to
relight the heater.
Replace the oil
preheater high limit.
YES
NO
Has there
been line voltage across
Terminals 1 and 2 for at least
15 minutes?
Check for line
voltage across Terminals
15 and 11. Is voltage
read?
Is inlet nozzle
adapter warm to the
touch?
Check for line
voltage across Terminals
17 and 2. Is voltage
read?
Check for line
voltage across Terminals
16 and 2. Is voltage
read?
Check for line
voltage across Terminals
4 and 2. Is voltage
read?
Measure the resistance
across the F-F
terminals on the
ignition controller.
Is the
resistance zero?
Correct
short circuit.
Is the
resistance greater than
1500 ohms?
Clean cell face
and seat firmly
into holder.
Is resistance
greater than 1500
ohms?
Is the overfire
draft correct?
Is the CO2
correct?
Replace
the cad cell.
Adjust for
proper CO2.
Adjust
barometric
damper.
Cad cell and
ignition controller
are OK.
Replace fan and
limit control
assembly.
Replace nozzle
low oil
temperature limit.
Check for
line voltage across "Tan"
oil heater wires and Terminal
11. Is voltage read?
Check continuity of
300 watt element. Is there
sufficient ohms?
Replace oil heater
temperature control
(pre-heater).
Replace oil
heating element
(pre-heater).
Replace oil heater
low temperature
limit (pre-heater).
Check for
line voltage across 14
and 11. Is voltage
read?
Check
for continuity of 30
watt heating elements. Is
continuity read?
Is cold
air discharging
from burner
tube?
Add draft
inducer
Replace 30 watt
heating
elements.
Replace nozzle
temperature
control.
Is the oil
preheater hot to the
touch?
Replace the oil
preheater
temperature control.
Check for line
voltage at the manual
disconnect switch. Is
voltage read?
Replace manual
disconnect
(on/off) switch.
Turn on or correct
supply. Wait 15
minutes for heater to
warm up.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
YES
YES
NO
Does the
backflow sensor need
reset?
FIRST,
turn on the main
power to the unit at the
disconnect switch and
wait at least 15 minutes
before proceeding.
•
If GREEN “system
ready” light is NOT
LIT, continue with
the troubleshooting
guide in Chart No. 1,
left.
•
If GREEN “system
ready” light is “ON”,
skip to Chart No. 2,
page 41.
Refer to illustrations on page 38 and 40.
