TM 10--3510--221--24
0071 00--3/4 blank
FUEL LEVEL OR PRESSURE LO -- Continued
0071 00
21. Use maintenance menu to test heating system. When burner blower comes on check for >100 VAC across
temperature switch relay (CR301) coil terminals.
Is >100 VAC present?
YES Go to step 22.
NO Check wire connections between CR301 and temperature limit switch (TS300) and between
CR301 and TB7 terminal (N). Repair as necessary.
22. Use maintenance menu to test heating system. When burner blower comes on check for >100 VAC
between CR301 terminal (NO) and TB7 terminal (N).
Is >100 VAC present?
YES Go to step 23.
NO Check wire connections between CR301 and temperature limit switch (TS300). Repair as
necessary.
23. Use maintenance menu to test heating system. When burner blower comes on check for >100 VAC
between CR301 terminal (C) and TB7 terminal (N).
Is >100 VAC present?
YES Go to step 24.
NO Replace temperature limit switch relay CR301 (WP 0196 00).
24. Position SW2 then SW1 to OFF.
25. Check wire connections between fuel pressure switch (PS302) and temperature limit switch (TS300) and
between PS302 and flame programmer (FP300).
Are connections OK?
YES Go to step 26.
NO Repair as necessary.
26. Attempt to adjust fuel pressure switch (WP 0177 00).
Can fuel pressure switch be adjusted properly?
YES Return to normal operation.
NO Replace fuel pressure switch PS302 (WP 0177 00).
END OF WORK PACKAGE
