TM 5-2420-230-24-1
Table 3-6. Unit Troubleshooting Table. -- Continued
Malfunction
Test or Inspection
Corrective Action
62.
ARCTIC HEATER 7-DAY TIMER WILL NOT OPERATE.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical circuits, a
direct short may result. Damage to equipment and injury or death to personnel may occur.
Step 1.
Check fuse (1) on red wire (2).
If fuse (1) is broken, replace fuse.
Step 2.
Check for 24 Vdc between terminal 4 and terminal 11 on 7-day timer (3).
If 24 Vdc is present between terminal 4 and terminal 11, replace 7-day timer (3) (Para 20-4).
If 24 Vdc is not present between terminal 4 and terminal 11, check wire harness on 7-day timer (3)
for continuity. Replace wire harness if necessary (Para 12-27).
Change 1