TM 10-3510-209-24
Table 2-2. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8.
WATER HEATER FUEL PUMP FAILS TO DELIVER FUEL TO BURNER.
Step 1.
Check for low fuel supply in fuel container.
a.
If container is low on fuel, fill container with fuel. Refer
to TM 10-3510-209-10.
b.
If container fuel level is correct, proceed to next step.
Step 2.
Check for leaks in suction hose and for loose connections.
a.
If hose or connections leak, tighten suction hose connections
or replace leaking hose.
b.
If hoses or connections do not leak, proceed to next step.
Step 3.
Check for a reversed pump rotation. Pump should rotate
counterclockwise when viewed from the front.
WARNING
High voltage is present on this equipment. Do not perform maintenance with
power on. Death or serious injury may result.
a.
If pump rotation is reversed, interchange any two of the three
208-volt, 3-phase electrical supply lines at the fuel pump
motor.
b.
If pump rotation is not reversed, proceed to next step.
Step 4.
Check for a reversal of supply and return fuel hoses.
a.
If lines are reversed, disconnect fuel lines and connect in
proper places.
b.
If lines are not reversed, proceed to next step.
Step 5.
Check for dirt or clogs in fuel pump strainer.
a.
If dirt or clogs are found, clean or replace strainer. Refer
to paragraph 2-37.
b.
If strainer is clean, proceed to next step.
2-31
