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English
Code Possible Cause
Possible Solution
17
Detergent type oil
being used in pump.
Drain oil and refill pump with
full synthetic non-detergent
air compressor oil.
18
Very light duty cycles.
Run longer duty cycles.
19
Piston rings damaged
or worn.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
20
Cylinder or piston
damaged or worn.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
21
Air compressor
cylinder finish worn.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
22
Water in pump oil.
Drain oil and refill pump with
full synthetic non-detergent
air compressor oil.
23
Low voltage/motor
overload.
Check that power supply
is adequate and that air
compressor is on a dedicated
circuit. If air compressor
is connected to a circuit
protected by a fuse, use time
delay fuses.
Code Possible Cause
Possible Solution
24
Restricted air
passages.
Inspect and replace transfer
tubes or check valve, as
required.
25
Low voltage motor.
Furnish adequate power.
26
Bad check valve.
Replace check valve.
27
Seized pump.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
28
Oil level too high.
Reduce to proper level. See
Air Compressor Pump Oil
under Maintenance, page 21.
29
Poor ventilation.
Relocate air compressor to
an area with cool, dry, well
circulated air, at least 12 in.
from nearest wall.
30
Dirty cooling surfaces.
Clean all cooling surfaces.
31
Too much back
pressure in tank.
Open drain valve when
starting motor.
32
Air compressor too
cold.
Move air compressor to a
warmer location.
