Troubleshooting Introduction; Troubleshooting Guide- Supervisor Controller - Sullair LS20 Operator's Manual And Parts List

7.1 TROUBLESHOOTING INTRODUCTION

Whereas Sections 7.1 and 7.2 portray common
systematic setbacks that can occur during con-
troller operation, for a more thoroughly in-depth
coverage of machine operation setbacks, consult
the Troubleshooting Section in the machine's
operator's manual.
The information contained in the Troubleshooting
chart has been compiled from factory experience. 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
systematically analyzed before undertaking any

7.2 TROUBLESHOOTING GUIDE- SUPERVISOR CONTROLLER

MESSAGE
Air Filter Maint
Aux Motor Overload
E-Stop
E-Stop Push Button
E-Stop
E-Stop String
Low Water Pressure
Oil Change Due, Oil
Filter Change,
Separator Change Due,
Air Filter Change, Oil
Analysis Due
Main Motor Overload
TROUBLESHOOTING-SUPERVISOR
MODEL ENABLE
ALWAYS
ALL
ALWAYS
ALL
ALL ALWAYS
ALWAYS
ALL
ALWAYS
ALL
ALWAYS
ALL
ALWAYS
ALL
ALL ALWAYS
ALWAYS
ALL
ALWAYS
ALL
Watercooled
ALL
ALWAYS
ALL
ALWAYS
ALL
ALWAYS
ALL
ALWAYS
ALL
repairs or component replacement procedures.
A detailed visual inspection is worth performing for
almost all problems and may avoid unnecessary
additional damage to the compressor. 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
Distributor or the Sullair Corporation factory Service
Department.
PROBABLE CAUSE
Differential Pressure Across
Inlet Filter High
Auxiliary Motor Tripped on
Cooling Fan, Oil Pump or Other
Motor
E-Stop Button Active
Auxiliary E-Stop String Open
Cooling Water Pressure Below
10 psi (0.7bar)
Maintenance Due
Main Motor Overload
Section 7
REMEDY
Replace filter.
Check inlet filter pressure switch.
Reset auxiliary overload after heater
element cools. Verify correct motor
amps.
Check for loose connections.
Check motor starter contact for
proper operation.
Check line voltage, if low consult
power company.
Release button.
Check wiring.
Check auxiliary E-Stop devices.
Check wiring.
Check for closed valves or broken
pipes.
Select Maintenance from menu to
see service due and part numbers.
Reset overload after heater element
cools down.
Make sure compressor is properly
configurated.
Make sure load pressure is set
below limit of compressor.
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