Section 8
TROUBLESHOOTING
37
8.1 STANDARD ELECTRO/MECHANICAL
TROUBLESHOOTING INTRODUCTION
The information contained in the Troubleshooting
chart is based upon both the reports about actual
field applications, and extensive testing done at the
factory. It contains symptoms and usual causes for
the described problems. However DO NOT assume
that these are the only problems that may occur. All
available data concerning the trouble should be sys-
tematically analyzed before undertaking any repairs
or component replacement procedures.
A detailed visual inspection is worth performing for
almost all problems. Doing so can prevent unneces-
sary damage. Always remember to:
a. Check for loose wiring.
b. Check for damaged piping.
c. Check for parts damaged by heat or an electrical
short circuit, usually apparent by discoloration or
a burnt odor .
Should your problem persist after making the rec-
ommended check, consult your nearest Sullair rep-
resentative or the Sullair Corporation factory.
8.2 TROUBLESHOOTING -- STANDARD ELECTRO/MECHANICAL
SYMPTOM PROBABLE CAUSE REMEDY
COMPRESSOR WILL NOT START Mai n Disconnect Switch Open Close switch.
Line Fuse Blown Replace fuse.
Control Transform er Fuse Blown Replace fuse.
Motor Starter Overloads Tripped Reset. Should trouble persist, check
whether motor starter contacts are
functioning properly.
Low Incoming Line Voltage Check voltage. Should voltage check low,
consult power company.
COMPRESSOR SHUTS DOWN Loss of Control Voltage Reset; if trouble persists, check that line
WITH AIR DEMAND PRESENT pressure does not exceed maximum
operating pressure of the compressor
(specified on nameplate).
Low Incoming Voltage Consult power company.
Excessive Operating Pressure Defect in line pressure switch; check
pressure at which contact points open.
Separator requires maintenance; check
maintenance gauge under full load
conditions.
Defective solenoid valve. Repair if defective.
Defective blowdown valve; blowdown valve
should exhaust sump pressure to 30 to 35
psig (2.1 to 2.4 bar) when maximum
operating pressure is reached. Repair if
defective.
Discharge Temperature Switch Cooling water temperature too high;
Open increase water flow (water--cooled only).
Cooling water flow insufficient; check water
lines and valves (water--cooled only).
Cooler plugged; clean tubes. If plugging
persists, install water conditioner
(water--cooled only).
Cooling air flow restricted; clean cooler and
check for proper ventilation. (air--cooled only).
Ambient temperature is too high; provide
sufficient ventilation.
Low fluid level; add fluid.
Clogged filter; change the fluid filter
element if indicated by the maintenance
gauge.
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