TM 5-4520-256-14
Item No.
Item To Be Inspected
Procedure
10
Fuel Tank
Inspect fuel tank for leaks, missing hardware, or
corrosion.
11
Fuel Tube Assemblies
Inspect tube assemblies for loose mounting, leaks,
or corrosion.
12
Frame Skid
Inspect skid for cracks, secure mounting, and cor-
rosion.
Section V. TROUBLESHOOTING
Para
Para
Introductory Information ................................ 3-7
Troubleshooting .................................................. 3-9
Symptom Index............................................. 3-8
3-7. INTRODUCTORY INFORMATION.
a.
The table lists the common malfunctions which you may find during the operation or maintenance of the heater
or its components. You should perform the tests/inspections and corrective actions in the order listed.
b.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by the listed corrective actions, notify your supervisor.
3-8. SYMPTOM INDEX.
Malfunction
No.
Malfunction
Page
11
Burner does not go off when heater is switched to vent mode.......................................... 3-16
6
Burner smokes excessively.............................................................................................. 3-11
1
Centrifugal fan fails to start .............................................................................................. 3-6
3
Fuel pressure fails to rise (Heat Mode)............................................................................. 3-8
10
Heater contains improper fuel for the ambient temperature.............................................. 3-14
13
Heater fails to operate...................................................................................................... 3-16.3
5
High fuel pressure............................................................................................................ 3-11
4
Low fuel pressure............................................................................................................. 3-10
12
Motor starter (model H83) failed....................................................................................... 3-16.1
8
No ignition........................................................................................................................ 3-12
7
Return air temperature is higher or lower than desired...................................................... 3-11
2
SAFETY RELEASE indicator light illuminates .................................................................. 3-7
9
Thermostats do not control the burner or temperature...................................................... 3-13
Change 5 3-5
