Table 2-2. Unit Troubleshooting (Continued)
TEST OR INSPECTION
WATER HEATER FUEL PUMP FAILS TO DELIVER FUEL TO BURNER.
Check for low fuel supply in fuel container.
If container is low on fuel, fill container with fuel. Refer to
If container fuel level is correct, proceed to next step.
Check for leaks in suction hose and for loose connections.
a. If hose or connections leak, tighten suction hose connections or replace leaking
b. If hoses or connections do not leak, proceed to next step.
Check for a reversed pump rotation. Pump should rotate counterclockwise when
viewed from the front.
High voltage is present on this equipment. Do not perform
maintenance with power on. Death or serious injury may
If pump rotation is reversed, interchange any two of the three 208-volt,
3-phase electrical supply lines at the fuel pump motor.
If pump rotation is not reversed, proceed to next step.
Check for a reversal of supply and return fuel hoses.
If lines are reversed, disconnect fuel lines and connect in proper places.
If lines are not reversed, proceed to next step.
Check for dirt or clogs in fuel pump strainer.
If dirt or clogs are found, clean or replace strainer. Refer to paragraph 2-39.
If strainer is clean, proceed to next step.