Troubleshooting - Quincy Compressor Climate Control Series Instruction Manual

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Table Of Contents

Table of Contents

SECTION 6

Trouble

Low discharge pressure

Water in the crankcase

(lubricant appears milky)

Rusty valves

and/or cylin ders

Excessive vibration

Climate Control Series

2022209100, August 2018

Probable Cause

•Restricted inlet

•Defective compressor valves

•Leaks in the compressed air distribution system at fittings, connections,

etc.

•Pressure switch defective or set wrong

•Drive belt slipping

•Incorrect speed

•Worn piston rings or loose piston

•Faulty hydraulic unloader

•Leaking head gasket

•Low lubricant pressure

•Drain valve open

•Defective pressure gauge

•Excessive running clearances

•Pressure relief valve leaking

•Clogged intercooler

•Loose compressor valves or leaking at valve gaskets

•Compressor incorrectly sized for the alti tude at which it is operating

•Compressor does not run long enough to get hot and vaporize the liquids

squeezed out of the air during compression (compressor may be too large

for application)

•Incorrect or inferior grade of lubricant

•System pressure leaking back through dis charge valve

•Compressor operated too infrequently

•Compressor does not run long enough to get hot and vaporize the liquids

squeezed out of the air during compression (compressor may be too large

for application)

•Compressor not properly prepared for stor age

•Discharge line from compressor head is pointed upward allowing con -

densation to drain back at shutdown

•Incorrect speed

•Compressor valves not functioning prop erly

•Loose pulley/sheave

•Motor or engine out of balance

•Compressor, motor or engine not secured tightly, or tightened into a

bind

•Foundation or frame inadequate