Campbell Hausfeld CE7000 Series Operating Instructions Manual page 18

Operating Instructions
Troubleshooting Guide for Units in Service for a Period of Time (Continued)
SyMptoM
Milky oil in crankcase
Pressure switch
continually blows air out
the unloader valve
Pressure switch does
not release air when the
compressor shuts off�
Compressor will not
shut off
Unit vibrates excessively
Water in discharge air
18 www.CH-Commercial.com
CAuSe
Low usage of compressor -
water is condesing in the
crankcase
Wrong type of oil
Improper environment
Rotation incorrect
Slight leakage of tank check
valve
Defective check valve
Pressure switch unloader not
working properly
Defective pressure switch
Defective safety valve
Loose fasteners
Loose pulley, loose belt or
misalignment or pulleys
Defective pump
Hot humid weather
Water accumulated in the
tank
Solution
Run the compressor continuously for 1 hour� The heat generated during
this running period will evaporate the moisture out of the oil�
Do not use SAE-30 automotive type oil. Using the wrong oil can cause
various problems with the pump and will void the warranty� Only use
the oils that the operating manual recommends�
Unit should not be installed in a poorly vented area or exposed to
extreme cold or hot conditions� Normal operating range should be
between 32°F and 100°F�
Check to make sure the compressor is running the direction of the
flywheel arrow� Air flow should be so that the flywheel directs air across
the head of the pump� Standing in front of the compressor (non-belt
guard side) air should flow back to front�
Air cools and condensates, then leaks back into the pump. Draining
tank of air after use will normally take care of this situation�
Replace check valve�
Drain the tank of all pressure. Restart compressor under no load. If
compressor is able to start, then the unloader needs to be checked�
If this problem is not corrected it will fail the motor and / or other
electrical components�
Setting too high. If adjusting the setting does not work, replace pressure
switch�
Make sure tank pressure gauge is reading correctly and if necessary
replace tank safety valve
This includes mounting bolts for the pump, motor, belt guard, mag�
starter, etc� Check for loose fasteners as part of a routine maintenance
schedule� Tighten any loose fasteners�
The pulley and belt may need to be tightened over time� The pulleys
may need to be realigned to assure proper belt wear and lower
vibration� These should be checked as part of regular maintenance�
A defective pump includes knocking or making noises not normal to
the pump design� Severe oil out the breather usually indicates ring or
cylinder wear� Low pump performance could indicate valve problems�
There are numerous symptoms associated with a defective pump� The
pump will need to be evaluated�
During hot and humid weather it is normal to accumulate water in the
compressor tank� This is normal and requires frequent draining of tank�
We recommend use of an automatic drain along with filters and dryers
if this is a problem�
Drain tank of water to prevent tank corrosion and air tool wear. It is
recommended use of an automatic drain along with filters and dryer to
prevent water into exhaust air of the compressor�
Continued on next page