TM 5-2420-230-24-1
Table 3-6. Unit Troubleshooting Table. -- Continued
Malfunction
Test or Inspection
Corrective Action
64.
ARCTIC HEATER 7-DAY TIMER DISPLAYS ERROR CODE.
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.
Obtain error code from 7-day timer display (1).
If 7-day timer displays F10 or F11, go to Step 2.
If 7-day timer displays F12, F14, F17, F60, F61, F71, or F72, replace overheat and temperature
sensors (Para 20-11).
If 7-day timer displays F20 or F21, replace glow pin (Para 20-10).
If 7-day timer displays F30, go to Step 4.
If 7-day timer displays F31 or F32, replace combustion air blower (Para 20-6).
If 7-day timer displays F41 or F42, replace water pump (Para 20-12).
If 7-day timer displays F47 or F48, go to Step 5.
If 7-day timer displays F51, F52, F53, F54, or F56, go to Step 6.
If 7-day timer displays F64 or F65, replace flame sensor (Para 20-8).
If 7-day timer displays F90, F92, F93, or F97, replace control unit (Para 20-7).
Change 1