Table 3-6. Unit Troubleshooting Table. -- Continued
Test or Inspection
ARCTIC HEATER 7-DAY TIMER DISPLAYS ERROR CODE. -- CONTINUED
Check battery cables (2) and batteries (3) for damage, and ensure they are fully charged
If battery posts (4) are broken, or if batteries (3) will not charge, replace batteries (Para 12-6).
If battery cables (2) are broken or damaged, replace battery cables (Para 12-7).
With engine running, check for 26 to 28 Vdc at terminal B on alternator (5) (refer to FO-3).
If alternator (5) is reading the correct voltage and problem persists, notify supervisor.