Sullair 175 Operators Manual And Parts Lists page 33

TROUBLESHOOTING (continued)
SYMPTOM
COMPRESSOR WILL NOT
BUILD UP FULL DISCHARGE
PRESSURE (CONTINUED).
IMPROPER UNLOADING
WITH AN EXCESSIVE PRESSURE
BUILD--- UP CAUSING PRESSURE
RELIEF VALVE TO OPEN
INSUFFICIENT AIR DELIVERY
EXCESSIVE COMPRESSOR
FLUID CONSUMPTION
COMPRESSOR OVERHEATING
PROBABLE CAUSE
Defective Pressure Regulator
Defective Idle Warm--- up Valve
Pressure Regulating Valve Is Set
Too High
Leak In Control System Causing
Loss Of Pressure Signal
Inlet Valve Jammed
Restriction In The Control System
Defective Pressure Relief Valve
Opening At Too Low Of Pressure
Defective Pressure Regulator
Engage Idle Warm--- up Valve For
Full Compressor Operation.
Plugged Air Filter
Plugged Air/Fluid Separator
Defective Pressure Regulator
Engine Speed Too Low
Defective Idle Warm--- up Valve
Clogged Return Line
Leak In The Lubrication System
Separator Element Damaged Or Not
Functioning Properly
Low Sump Fluid Level
Loose Or Broken Fan Belt
Dirty Fluid Cooler Core
Plugged Compressor Fluid Filter
Faulty Thermostat
Plugged Fluid Cooler Tube (Internal)
Section 5
MAINTENANCE
REMEDY
Check diaphragm and replace if necessary
(kit available).
Order kit or replace valve.
Readjust.
Check control lines.
Defective pressure regulating valve;
repair valve (kit available).
Free or replace valve.
Check all control lines and components.
Ice and/or other contaminants could cause
restrictions.
Replace pressure relief valve.
Check diaphragm and replace if necessary
(kit available).
Replace.
Replace separator element and also change
compressor fluid and fluid filter at this time.
Adjust or repair.
Readjust engine speed.
Order kit or replace valve.
Clear orifice and return line strainer.
Check all pipes, connections and
components.
Change separator element.
Fill.
Tighten or change belt.
Clean core thoroughly.
Change element.
Change thermostat element.
Replace cooler.
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