TM 5-2420-230-10
Table 3-4. Troubleshooting Table. (Continued)
Malfunction
Test or Inspection
Corrective Action
35.
ARCTIC HEATER 7-DAY TIMER DISPLAYS ERROR CODE.
Step 1.
Check error code shown on 7-day timer display (1).
If 7-day timer displays F52 or F53, go to Step 2.
If 7-day timer displays F51, F52, F53 or F54, go to Step 3.
If 7-day timer displays any other error code, notify Unit maintenance.
Step 2.
Check fuel tank (2) for fuel level, water in fuel, and correct grade of fuel (Para 3-21).
If there is no fuel, fill fuel tank (2) with JP-8 fuel (Item 11, Appendix D).
If water in fuel or incorrect grade of fuel, notify Unit maintenance.
If fuel is present and correct, and problem persists, notify Unit maintenance.
Step 3.
Check arctic heater exhaust pipe (3) for visible blockage.
Remove blockage, if present.
If exhaust pipe is visibly unobstructed, or problem persists, notify Unit maintenance.
Change 1