DeWalt D55170 Instruction Manual page 29

CODE POSSIBLE CAUSE
24 Regulator is not adjusted correctly for accessory being
used
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
32 D55170, D55180
Manual lock unloader lever in open position
D55390, D55395, D55570, D55575, D55580, D55585
Pilot valve knob is in the open position
POSSIBLE SOLUTION
It is normal for some pressure drop to occur when an acces-
sory is used, adjust the regulator as instructed in Regulator
under Features if pressure drop is excessive.
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 that a
50%-75% average duty cycle be maintained; that is, the air
compressor pump should not run more than 30-45 minutes
in any given hour.
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.
Rotate manual lock unloader lever to the closed perpendicular
position.
Turn pilot valve knob clockwise until it stops.
29
WALT synthetic compressor
E
WALT
E
WALT
E
WALT
E
WALT synthetic compressor
E