Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 7: TROUBLESHOOTING
Section 7.3,
continued
Section 7.3,
continued
NOTE (7.3-C):
Be sure to check that each fitting at
the
Fuel Filter Head
contains thread sealant. A
fitting without thread sealant could result in an air
leak. Be sure to clamp off both fuel lines at the filter
head prior to any fitting removal. If fittings are
removed and reinstalled, be sure to remove the fuel
line clamps prior to attempting a heater restart.
Failure to do so could result in serious damage to
the Diesel-Burner’s
Fuel Pump
.
2. Once the potential air leak has
been discovered and
corrected, reattach the
Aqua-Hot’s
Fuel Return Line
and attempt heater restart.
Does the Aqua-Hot’s exhaust
system still sputter?
If the exhaust system is still sputtering:
Continue performing air leak
inspections until all air leaks have
discovered and corrected.
Q6 : Is the Diesel-Burner’s
Controller
function-
ing properly?
I.
In order to determine if the
Controller
is
functioning properly, reference Section 8.11
and perform the
Controller’s
“Component
Test.”
A:
If the
Controller
is not functioning
properly:
The
Controller
must be replaced;
reference Section 8.11 for replace-
ment instructions.
If the
Controller
is functioning properly:
Continue troubleshooting.
Q7 : Is the Diesel-Burner’s
Ignition Coil
functioning properly?
I.
In order to determine if the
Ignition Coil
is
functioning properly, reference Section 8.10
and perform the Ignition Coil’s “Component
Test.”
A:
If the
Ignition Coil
is not functioning
properly:
The
Ignition Coil
must be
replaced; reference Section 8.10
for replacement instructions.
(continued in the next column)
If the
Ignition Coil
is functioning properly:
Reference “NOTE (7.3-D).”
NOTE (7.3-D):
If the
Aqua-Hot
still does not ignite
after several starting attempts and all of the listed
checks were performed, contact the Technical
Support Department at
1-800-685-4298
for addi-
tional assistance.
Ignition
Electrodes
Photo Disc
Flame Sensor
Fuel Pump
Fuel Solenoid
Fuel
Nozzle
Diesel-Burner
Controller
Ignition Coil
Illustration 7.3-3
Page 25
