TM 9-4940-568-20
2-89
Table 2-11. Air Compressor Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. ABNORMAL PISTON, RING OR CYLINDER WEAR.
Oil level too low.
Fill to correct level.
Detergent type oil being used.
Change to non-detergent type with rust and oxidation inhibitor.
Oil control ring broken or not seated in, stuck in groove, rough, scratched, or excessive end gap.
Replace air compressor (Para 11-2).
Extremely dusty atmosphere.
Need more effective air inlet muffler and cleaner.
11. AIR COMPRESSOR WILL NOT START (NO POWER).
Check to see if air compressor will reset.
Press blue button at air compressor control box.
Open air compressor control box and check for 208 VAC at T1, T2, and T3 with compressor switch on.
Check for 208VAC at air compressor motor.
If voltage is present, Notify Supervisor.
If voltage is not present, replace wires (see schematic Figure 2-6).
Check for 208VAC at input side of current reset switch.
If voltage is present, replace current reset switch (Para 3-2).
If voltage is not present, perform next test.
Check for 208VAC at input side of compressor relay from main AC panel.
If voltage is not present, troubleshoot panel.
If voltage is present, perform next test.
Check for 120VAC to fuses FU2 and FU3.
If voltage is not, replace wire as necessary (see schematic Figure 2-6).
If voltage is present, perform next test.
Check for 120VAC from FU2 and FU3.
If voltage is not present, replace fuse as necessary (Para 3-2).
If voltage is present, perform next test.
