Section 7
MAINTENANCE
47
7.8 TROUBLESHOOTING
The information contained in the Troubleshooting
chart is based upon both the actual applied situa-
tions 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.
A detailed visual inspection is worth performing for
almost any problems which may prevent unneces-
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.
LUBRICANT (MoS2) TYPE
Molykote 321 R Spray
(lube coat)
Molykote Spray Spray
(powder spray)
Molykote G Rapid Spray or Paste
Aemason MO 19 P Spray or Paste
DIO-setral 57 N
(lube coat) Spray or Paste
Locking screws are lubricated with a multipurpose
grease as Molykote BR 2 or similar.
Table 7-2 Tapered Surface Lubricants
COMPRESSOR WILL NOT START
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND PRESENT
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
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.
Replace Supervisor display module if no display
or erratic display.
Check incoming power.
Check control fuses and wiring.
Consult power company. The Sullair Supervisor
will provide indication of most maintenance prob-
lems if control power has not been lost. Shutdowns
will occur upon a faulty condition or a bad sender
condition.
Check maximum P2 pressure setting.
HIGH PRESS P1 display; Max P1 pressure may
be set too low. Consult factory for recalibration.
Defective solenoid valve; solenoid valve should
cause Sullicon Control lever to move to unload
stop when the unload pressure setting P2A is
exceeded. Repair if defective.
7.9 TROUBLESHOOTING GUIDE (I)
SYMPTOM PROBABLE CAUSE REMEDY
(I) Consult Section 5.13 for additional Supervisor aids to troubleshooting.
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