Graco 257100 Manuel D’Utilisation

Basic fluid flow problems

Flow control knob turned up but unit is not 
pumping.

Learn the Controller, see page 9. 
Check battery voltage.

Flow control knob setting. Motor will not run if 
at minimum setting (fully counterclockwise). 

Slowly increase flow setting to see if 
motor starts.

Valve or filter may be clogged.

Relieve pressure and clear clog.

Basic mechanical problems

Frozen material.

Place drywall feed pump in warm area 
to thaw. Do not start unit until thawed 
completely. 

Hardened material.

Clean unit.

Motor. Remove drive housing assembly. 
Try to rotate fan by hand.

Replace motor if fan won't turn.

Basic electrical problems

Motor control board. Board shuts down and 
displays error code.

See Control Board Diagnostics.

No power.

Check power source.

Extension cord. Check extension cord conti-
nuity with volt meter.

Replace extension cord.

Power supply cord. Inspect for damage such 
as broken insulation or wires. 

Replace power supply cord.

Check that motor leads are securely fastened 
and properly mated.

Replace loose terminals; crimp to 
leads. Be sure terminals are firmly con-
nected. Clean circuit board terminals. 
Securely reconnect leads.

ON/OFF Switch. 

See Unit Will Not Run, page 25.

Check all terminals for damage or loose fit.

Replace damaged terminals and 
reconnect securely.

Battery has no power

Battery voltage depleted.

Replace battery. Graco part 
number:15X949 (CR123A-3V Lithium)

RF problems

See RF Problems, page 18.

Motor is hot

Digital display shows E=06

Move unit to shaded, cooler area if pos-
sible. Be sure ambient temperature 
where unit is located is no more than 
90°F and unit is not located in direct 
sun.