TM 10--3510--221--24
0071 00--2
FUEL LEVEL OR PRESSURE LO -- Continued
0071 00
8. Use maintenance menu to turn on TF pump (WP 0010 00).
9. Push up on FUEL PRIMING switch for 120 seconds to prime fuel system while observing fuel pump
pressure gauge.
After 90 seconds is reading >130 psig?
YES Go to step 18.
NO Go to step 10.
10. Use maintenance menu to turn off TF pump.
11. Position SW2 then SW1 to OFF.
12. Remove cover from blower shroud. Check coupling connection between blower motor and fuel pump.
Is coupling connection OK?
YES Reinstall cover on blower shroud. Go to step 13.
NO Replace coupling (WP 0180 00).
13. Replace fuel filter (WP 0176 00).
14. Position SW1 then SW2 to ON.
15. Use maintenance menu to turn on TF pump.
16. Push up on FUEL PRIMING switch for 120 seconds to prime fuel system while observing fuel pump
pressure gauge.
After 90 seconds is reading >130 psig?
YES Return to normal operation.
NO Go to step 17.
17. Attempt to adjust fuel pump pressure (WP 0178 00).
Can fuel pump pressure be adjusted properly?
YES Return to normal operation.
NO Replace fuel pump (WP 0178 00).
18. Use maintenance menu to test heating system while monitoring heater operation.
Does heater come on and sustain combustion for at least 30 seconds?
YES Go to step 19.
NO Go to step 20.
19. Observe operator panel A display.
Does another FUEL LEVEL or PRESSURE LO message appear?
YES Go to step 20.
NO Return to normal operation.
20. Open door on heater control enclosure.