Page 328 - Reciprocating Compressors Operation Maintenance

Troubleshooting Compressor Problems 313

TABLE 5-1 (CONTINUED)
TROUBLESHOOTING CHART

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The Problem
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The Causes flsl Ssl 1 y o, I ll Jl
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Piston ring gaps not staggered
Piston or ring drain holes clogged *
.
Centrifugal pilot valve leaks
Runs too little (3) • *
Detergent oil being used (4) •
Location too humid and damp
Oil relief valve defective •
•
Oil piping leaks
Oil filter or strainer clogged *
Air leak into pump suction •
Gear pump worn, defective *
Receiver too small *
Receiver, drain more often *
Demand too steady (3) *
Unloader parts worn or dirty *
Control air filter, strainer clogged •
Regulation piping clogged *
Motor too small .
Electrical conditions wrong •
Voltage abnormally low *
Excitation inadequate •
Motor overload relay tripped *
*
Fuses blown
Wiring incorrect #
Low oil pressure relay open .
System leakage excessive *
Bearings need adjustment or renewal *
(3) Use constant speed control
(4) Change to nondetergent oil