13-9-663 Page 71
SYMPTOM
POSSIBLE
CAUSE
REMEDY
Compressor starts too
slowly
1.
Wye Delta switch time set
too long.
1. Contact
your
Champion
distributor.
2.
Minimum Pressure/Check
Valve is faulty.
2.
Repair or replace.
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
stuck closed.
3. Replace
valve.
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
too low.
6.
Adjust the unload
pressure. See Manual
13-9-653.
Excessive oil
consumption
1. Oil
carryover
through
lines.
1.
See “Oil Carryover”, in this
section.
2.
Oil leaks at all fittings and
gaskets.
2.
Tighten or replace fittings
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
face.
2. Clean
cooler.
3.
Insufficient cooling air flow
3.
Provide unrestricted
supply of cooling air.
4.
Clogged oil filter or cooler
(interior)
4.
Replace filter or clear
cooler.
5.
Low compressor oil.
5.
Add oil to proper level.
