Troubleshooting-- Standard Electro - Sullair LS16 Operator's Manual

6.1 TROUBLESHOOTING- - STANDARD ELECTRO-
MECHANICAL
The information contained in the Standard Electro-
Mechanical Troubleshooting chart has been com-
piled from field report data and factory experience. It
contains symptoms and usual causes for the de-
scribed problems. However, DO NOT assume that
these are the only problems that may occur. All avail-
able data concerning a problem should be systemati-
cally analyzed before undertaking any repairs or
component replacement procedures.
A detailed visual inspection is worth performing for
TROUBLESHOOTING- - STANDARD ELECTRO-MECHANICAL
SYMPTOM
COMPRESSOR WILL NOT START
COMPRESSOR SHUTS DOWN WITH Loss of Control Voltage
AIR DEMAND PRESENT
PROBABLE CAUSE
Main Disconnect Switch Open
Line Fuse Blown
Control Transformer Fuse Blown
Motor Starter Overloads Tripped
Low Incoming Line Voltage
Low Incoming Voltage
Excessive Operating Pressure
Discharge Temperature Switch Open
TROUBLESHOOTING
almost all problems and may avoid unnecessary
additional damage to the compressor. Always re-
member to:
1. Check for loose wiring.
2. Check for damaged piping.
3. 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 recom-
mended check, consult your nearest Sullair repre-
sentative.
Close switch.
Replace fuse.
Replace fuse.
Reset. Should trouble persist, check
whether motor starter contacts are
functioning properly.
Check voltage. Should voltage check low,
consult power company.
Reset. If trouble persists, check that line
pressure does not exceed maximum oper--
ating pressure of the compressor (specified
on nameplate).
Consult power company.
Defect in line pressure switch; check pressure
at which contact points open.
Separator requires maintenance; check
maintenance indicator under full load condi--
tions.
High pressure shutdown switch is defective;
replace.
Defective valve; regulator valve should
cause inlet valve to close when the pressure
switch contacts open. Repair if defective.
Defective blowdown valve; blowdown valve
should exhaust sump pressure to 10 to
15 psig (0.7 to 1.0 bar) when maximum
operating pressure is reached. Repair if
defective.
Cooling water temperature too high;
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.
Ambient temperature is too high; provide
sufficient ventilation.
Low fluid level; add fluid.
Clogged filter; change the fluid filter element
and change the bearing filter element if
maintenance indicator shows red.
Section 6
REMEDY
29