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13-21-615 v01 Page 80
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor starts too
slowly
1.
Wye Delta switch time set
too long.
1.
Contact your distributor.
2.
Minimum Pressure/Check
2.
Repair or replace.
Valve is faulty.
3.
Supply voltage is too low.
3.
Check the supply voltage.
Compressor is low on
delivery and pressure
1.
Restricted air filter.
1.
Clean or replace filter.
2.
Sticking inlet valve.
2.
Inspect and clean inlet
valve.
3.
Minimum pressure valve
3.
Replace valve.
stuck closed.
4.
Leaks in the compressed
air system.
4.
Check for leaks, fix any
leaks found.
5.
Aftercooler is frozen
5.
Thaw out. This machine
cannot operate in
temperatures below 32
F
(0
C).
6.
Unload pressure adjusted
6.
Adjust the unload
too low.
pressure.
Excessive oil
consumption
1.
Oil carryover through
lines.
1.
See “Oil Carryover”, in this
section.
2.
Oil leaks at all fittings and
2.
Tighten or replace fittings
gaskets.
or gaskets.
3.
Shaft seal leaking.
3.
Replace shaft seal.
High discharge air
temperature
1.
Thermostatic mixing valve
stuck open.
1.
Repair or replace valve.
2.
Dirty or clogged cooler
2.
Clean cooler.
face.
3.
Insufficient cooling air flow
3.
Provide unrestricted
supply of cooling air.
4.
Clogged oil filter or cooler
4.
Replace filter or clear
(interior)
cooler.
5.
Low compressor oil.
5.
Add oil to proper level.