CODE
POSSIBLE CAUSE
21
Air tank pressure is too high
22
Engine problem
23
Engine or pump oil is low
24
It is normal for some pressure drop to occur
25
Damaged regulator
26
Detergent type oil being used in pump
27
Extremely light duty cycles
28
Piston rings damaged or worn
29
Cylinder or piston damaged or worn
30
Compressor cylinder finish worn
31
Water in pump oil
POSSIBLE SOLUTION
Open the regulator and reduce air tank pressure to less
than 40 PSI (275.8 kPa).
Contact a D
WALT factory service center or a D
E
authorized service center
Add D
WALT synthetic compressor oil to pump. See
E
Compressor Pump Oil under Maintenance.
If there is an excessive amount of pressure drop when the
accessory is used, adjust the regulator as instructed in
Regulator under Features.
NOTE: Adjust the regulated pressure under flow conditions
while accessory is being used.
Replace.
Drain oil and refill pump with D
oil.
Run unit for longer duty cycles. It is recommended to run at
high throttle 50-75% of the run time and idle for 25% of the
run time.
Contact a D
WALT factory service center or a D
E
authorized service center
Contact a D
WALT factory service center or a D
E
authorized service center
Contact a D
WALT factory service center or a D
E
authorized service center
Drain oil and refill pump with D
oil.
23
WALT
E
WALT synthetic compressor
E
WALT
E
WALT
E
WALT
E
WALT synthetic compressor
E