Troubleshooting- Standard Electro- Mechanical - Sullair LS-100L Operator's Manual

guards located on each side of the unit/motor adap-
tor for the 25/30 HP (18/22 KW) packages, or the
two 3/8" bolt/nut/washer assemblies from the plate
guard and adaptor located on the top side.
STEP 2 - MOUNTING HUBS/ELEMENT
The coupling halves have a unique bore for the
motor and the air-end. The air-end half is to be
located so that the hub is positioned against the
shaft shoulder and secured in place by two set-
screws. The motor half should remain free floating
until the element is in its proper location. The motor
half is then positioned within assembly maintaining
an axial coupling gap as listed in Figure 7-5. There
are two set-screws located on the motor coupling
half also. Prior to starting of package, assure the
set-screws are secure to eliminate potential move-
ment of the hub.
7.9 TROUBLESHOOTING- STANDARD ELECTRO-
MECHANICAL
The information contained in the Standard
ElectroMechanical Troubleshooting chart has been
7.10 TROUBLESHOOTING GUIDE- STANDARD ELECTRO-MECHANICAL
SYMPTOM
COMPRESSOR WILL NOT
START
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND PRESENT
PROBABLE CAUSE
Main Disconnect Switch Open
Line Fuse Blown
Control Transformer Fuse Blown
Motor Starter Overloads Tripped
Low Incoming Line Voltage
Loss of Control Voltage
Low Incoming Voltage
Excessive Operating Pressure
compiled from field report data and factory experi-
ence. It contains symptoms and usual causes for
the described problems.
assume that these are the only problems that may
occur. All available data concerning a problem
should be systematically analyzed before undertak-
ing any repairs or component replacement proce-
dures.
A detailed visual inspection is worth performing for
almost all problems and may avoid unnecessary
additional damage to the compressor. Always
remember 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 rec-
ommended check, consult your nearest Sullair rep-
resentative.
REMEDY
Close switch.
Replace fuse.
Replace fuse.
Reset. Should trouble persist, check whether
motor starter contacts are functioning proper-
ly.
Check voltage. Should voltage check low,
consult power company.
Reset. If trouble persists, check that line
pressure does not exceed maximum operat-
ing pressure of the compressor (specified on
nameplate).
Consult power company.
Defect in line pressure switch; check pres-
sure at which contact points open.
Separator requires maintenance; check
maintenance indicator under full load condi-
tions.
High pressure shutdown switch is defective;
replace.
Section 7
MAINTENANCE
However, DO NOT
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