Gardner Denver L4-5C Original User Manual page 68

SYMPTOM
High discharge air
temperature
Excessive oil
consumption
POSSIBLE CAUSE
3. Minimum pressure valve
stuck closed.
4. Oil separator clogged.
5. Condensate drain
solenoid valve is faulty.
6. Leaks in the compressed
air system.
7. V-Belts broken.
8. V-Belts slipping.
9 Pressure limits incorrectly
set.
10 Aftercooler is frozen
1. Dirty or clogged cooler
core or fins.
2. Insufficient cooling air
flow.
3. Clogged oil filter or cooler
(interior).
4. Low compressor oil level.
5. Faulty temperature
sensor.
6. Thermostatic mixing valve
stuck open.
1. Oil carryover through
lines.
2. Oil leaks at all fittings and
gaskets.
3. Shaft seal leaking.
13-25-629 v03 Page 68
REMEDY
3. Replace valve.
4. Replace.
5. Inspect and replace.
6. Check for leaks, fix any leaks
found.
7. Replace complete set.
8.a Inspect and clean belt.
8.b Check that motor pivots freely
on bracket shaft.
9 Check/correct pressure limits
in the Controller.
10. Thaw out. This machine
cannot operate in temperatures
below 32F (0C).
1. Clean cooler.
2. Provide unrestricted supply of
cooling air.
3. Replace filter or clean cooler.
4. Add oil to proper level.
5. Replace sensor.
6. Inspect and/or replace valve.
See "Oil Carryover", in this
1.
section.
2. Tighten or replace fittings or
gaskets.
3.a Inspect scavenge orifice