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7.1 TROUBLESHOOTING
The information contained in the Troubleshooting
chart is based upon both actual applied situations
and extensive testing at the factory. It contains
symptoms and usual causes for the described prob-
lems. 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 repair or compo-
nent replacement procedures.
A detailed visual inspection is worth performing for
almost any problems which may prevent unneces-
7.2 TROUBLESHOOTING GUIDE
SYMPTOM
COMPRESSOR WILL NOT
START
COMPRESSOR SHUTS DOWN
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
P1 High Pressure Shutdown
Parameter is Adjusted Too Low
High Discharge Temperature
TROUBLESHOOTING
sary 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 rep-
resentative or the Sullair Corporation factory.
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.
Separator requires maintenance; check dP1
under full load conditions.
Defective blowdown solenoid valve; repair if
defective (kit available).
Defective blowdown valve; blowdown valve
should exhaust sump pressure to the atmos-
phere when maximum operating pressure is
reached. Repair or replace as necessary (kit
available).
Readjust MAX P1 setpoint appropriately.
Cooling water temperature too high; increase
water flow (water-cooled).
Cooling water flow insufficient; check water
lines and valves. (water-cooled).
Section 7
41
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