Graco 257100 Instruction Manual

Operation
Drywall Feed Pump
U.S. Patents Pending: 61/315,288; 61/315/322; 61/316,013; 61/316,010
- For water-based materials only -
- Not for use in explosive atmospheres -
- Not for use with quick-set materials -
Maximum Working Pressure 2500 psi (17.2 MPa, 172 bar)
Model 257100: 120V NA ETL
Model 258906: 240V Euro Multicord
Model 258907: 110V UK, CE
Model 262288: 120V NA
Model 262300: 240V Euro CE Cord
Agency Approvals:
READ ALL WARNINGS AND INSTRUCTIONS
Read all warnings and instructions in this manual.
Save these instructions.
257100 ✓✓✓
258906 ✓✓
258907 ✓
262288 ✓✓
262300 ✓✓
3A0245A
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ENG

Warning
23A0245A
Warning
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point sym-
bol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols appear in the
body of this manual, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may
appear throughout the body of this manual where applicable.
WARNINGWARNINGWARNING
WARNING
ELECTRIC SHOCK HAZARD
This equipment must be grounded.Improper grounding, setup, or usage of the system can cause electric shock.
•Turn off and disconnect power cord before servicing equipment.
•Use only grounded electrical outlets.
•Use only 3-wire extension cords.
•Ensure ground prongs are intact on power and extension cords.
•Do not expose to rain. Store indoors.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This may look like
just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
•Engage trigger lock when not dispensing.
•Do not point dispensing device at anyone or at any part of the body.
•Do not put your hand over the fluid outlet.
•Do not stop or deflect leaks with your hand, body, glove, or rag.
•Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or servicing
equipment.
•Tighten all fluid connections before operating the equipment.
•Check hoses and couplings daily. Replace worn or damaged parts immediately.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and
explosion:
•Do not dispense flammable or combustible materials near an open flame or sources of ignition such as
cigarettes, motors, and electrical equipment.
•Material or solvent flowing through the equipment is able to result in static electricity. Static electricity creates a
risk of fire or explosion in the presence of material or solvent fumes. All parts of the system, including the pump,
hose assembly, dispenser, and objects in and around the work area shall be properly grounded to protect against
static discharge and sparks. Use Graco conductive or grounded high-pressure airless material hoses.
•Verify that all containers and collection systems are grounded to prevent static discharge.
•Connect to a grounded outlet and use grounded extensions cords. Do not use a 3-to-2 adapter.
•Do not use a material or a solvent containing halogenated hydrocarbons.
•Keep work area well-ventilated. Keep a good supply of fresh air moving through the area. Keep pump assembly
in a well ventilated area.
•Do not smoke in the work area.
•Do not operate light switches, engines, or similar spark producing products in the work area.
•Keep area clean and free of material or solvent containers, rags, and other flammable materials.
•Know the contents of the materials and solvents being dispensed. Read all Material Safety Data Sheets (MSDS)
and container labels provided with the materials and solvents. Follow the material and solvents manufacturer’s
safety instructions.
•Fire extinguisher equipment shall be present and working.
•Drywall feed pump generates sparks. When flammable liquid is used in or near the drywall feed pump or for
flushing or cleaning, keep unit at least 20 feet (6 m) away from explosive vapors.

Warning
3A0245A 3
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
•Keep clear of moving parts.
•Do not operate equipment with protective guards or covers removed.
•Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•Always wear appropriate gloves, eye protection, and a respirator or mask when dispensing.
•Do not operate or dispense near children. Keep children away from equipment at all times.
•Do not overreach or stand on an unstable support. Keep effective footing and balance at all times.
•Stay alert and watch what you are doing.
•Do not leave the unit energized or under pressure while unattended. When the unit is not in use, turn off the unit and
follow the Pressure Relief Procedure for turning off the unit.
•Do not operate the unit when fatigued or under the influence of drugs or alcohol.
•Do not kink or over-bend the hose.
•Do not expose the hose to temperatures or to pressures in excess of those specified by Graco.
•Do not use the hose as a strength member to pull or lift the equipment.
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical reaction and
equipment rupture. Failure to follow this warning can result in death, serious injury, or property damage.
•Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such
solvents.
•Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier for compatibility.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating area of the equipment
to help protect you from serious injury, including eye injury, hearing loss, inhalation of toxic fumes, and burns. This
equipment includes but is not limited to:
•Protective eyewear, and hearing protection.
•Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
WARNINGWARNINGWARNING
WARNING

Component Identification (Unit)
43A0245A
Component Identification (Unit)
APump Module
BPrime/Tool Fill/Recirculation Valve/Pressure Relief
CFlow Control Knob
DON/OFF Switch
E15/20 Amp Switch (North America only)
FMaterial Hoses
GMovable Handle
HPump Connector
JPrime Hose
KHopper
LHopper Plug
MExpandable Plug
NPump
PMaterial Screen
A
B
C
E
D
F
N
L
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M
K
H
G
J
P

Component Identification (Hoses and Tools)
3A0245A 5
Component Identification (Hoses and Tools)
AA Fluid Manifold
BB Fluid Outlet
CC Fluid Inlet
DD Hose 1/2 in. x 50 ft (max 150 ft)
EE Fitting 1/2 in. x 1/4 in.
FF Hose 1/4 in. x 15 ft
GG Coupling
HH Z Swivel with Quick-Connect Clamp
JJ Inline Valve Controller
KK Box Slide Controller
LL Box Tool Handle
MM Box Tool Head
NN Tape Tool
PP Corner Tool Handle
RR Corner Tool Head
JJ
GG
FF
CC
BB
NN
KK
AA
LL
PP
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HH
DD
EE
MM
RR

Grounding
63A0245A
Grounding FCC Notice (FCC ID: JHICED1)
Model Number: DFS150
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference that may
be received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by
Graco, Inc. could void the user's authority to operate this
equipment.
IC Notice (IC: 4840ACED1)
This product meets the applicable Industry Canada
technical specifications/Le présent materiel est con-
forme aux specifications techniques applicables
d’Industrie Canada.
Pressure Relief Procedure
1. Turn flow control knob fully counterclockwise to OFF
position.
2. Place deflector in hopper or suitable container.
3. Turn prime valve handle to PRESSURE RELIEF
position.
4. Display will read “----” when all pressure is relieved.
If display does not reach 0, the hose or inline valve
are clogged and prime/tool fill/ recirculation valve is
plugged.
GROUNDING INSTRUCTIONS (North America)
This appliance is rated more than 15 A and is for use
on a circuit having a nominal rating of 120 V and is fac-
tory equipped with a specific electric cord and plug. No
adapter should be used with this appliance. If the appli-
ance must be reconnected for use on a different type of
electric circuit, the connection should be made by qual-
ified service personnel; and after the connection, the
appliance should comply with all local codes and ordi-
nances.
Consult a qualified electrician if there is any doubt as to
whether an outlet box is properly grounded.
GROUNDING INSTRUCTIONS (Europe)
The sprayer must be grounded. Grounding reduces the
risk of static and electric shock by providing an escape
wire for the electrical current due to static build up or in the
event of a short circuit.
The sprayer cord includes a grounding wire with an
appropriate grounding contact.
The plug must be plugged into an outlet that is properly
installed and grounded in accordance with all local
codes and ordinances.
Do NOT tamper with relief valve or devices that control
maximum flow control during normal operation. Bodily
injury and/or damaged to equipment can occur.
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Setup
3A0245A 7
Setup
1. Turn power switch to OFF and connect power cord.
2. Connect material hose (DD) to fluid manifold outlet
(BB).
NOTE: Up to 150 ft of 1/2 in. plus 15 ft. x 1/4 in. hose
can be connected to the unit. If desired flow rate is not
obtainable, reduce hose length or add additional water
to material mixture.
3. Use fitting (EE) to connect to hose (FF) and hose
(DD).
4. Use coupling (GG) to connect hose (FF) and Z
swivel (HH).
5. Connect Inline Controller Valve (JJ) if taping or finish-
ing corners.
6. Connect selected finishing tool using supplied
quick-connect clamps. See Using Finishing Tools,
page 11.
7. Select 15A/20A setting based on your circuit rating
(North America only).
NOTE: 20A setting will produce the best performance.
Digital Tracking System (DTS)
Operation Main Menu
Short press to move to next display. Press and hold (5 sec-
onds) to change units or reset.
1. Turn flow control knob fully counterclockwise to OFF
position. Perform Pressure Relief Procedure, page
6.
2. Turn power ON. Pressure display appears. Dashes
will not appear unless pressure is less than 200 psi
(14 bar, 1.4 MPa).
Change Display Units
Press and hold DTS button for 5 seconds to change pres-
sure units (psi, bar, MPa) to desired units. Selection of bar
or MPa changes gallons to liters x 10. To change display of
units, DTS must be in flow control mode and pressure must
be at zero.
Job Gallons
1. Short press DTS button to move to Job Gallons (or
liters x 10).
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EE
FF
GG HH
JJ
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BB
DD
20
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Psi
bar
Psi
MPa
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Setup
83A0245A
NOTE: JOB scrolls past, then the number of gallons dis-
pensed displays.
2. Press and hold to reset to zero.
Lifetime Gallons
1. Short press DTS button to move to LIFE gallons (or
liters x 10). LIFE scrolls briefly, then the number of
gallons dispensed displays.
Learn the Controller
This unit uses two different controllers: an inline valve con-
troller for taping and corner finishing, and a box slide con-
troller for box finishing. Each time you change controllers,
perform the following steps so the unit can learn the con-
troller.
1. Turn flow control knob fully counterclockwise to OFF
position.
2. Push digital display button 3 times until LEARN
appears on display screen.
3. Pull trigger on controller.
4. OK will then appear on display screen (if not, see
Troubleshooting).
NOTE: You must be facing the unit and be no more than 10
ft away to learn the controller. The unit can only be
operated by one learned controller at a time.
Secondary Menu - Stored Data
1. Perform Pressure Relief Procedure, see page 6.
2. To access Secondary Menu, make sure flow control
knob is turned fully counter-clockwise to the OFF
position. Then turn power switch on while holding
DTS button down.
3. SERIAL NUMBER scrolls past and then serial num-
ber (e.g. 00001) displays.
4. Short press DTS button and MOTOR HOURS
scrolls past and then total motor run hours are dis-
played.
5. Short press DTS button. LAST ERROR CODE
scrolls by and last error code is displayed (e.g.
E=07). See Electrical Problems, page 19.
Psi
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Setup
3A0245A 9
6. Press and hold DTS button to clear error code to
zero.
7. Short press to move to SOFTWARE REV.
8. Short press to display number of GUN TRIGGERS
logged.
9. Short press to enter BLOCK mode. Hold DTS but-
ton in to block any active outside RF signals in the
area other than the current learned controller. The
screen will display the number of unwanted signals
being blocked. Up to 5 unwanted RF signals can be
blocked.
NOTE: To see the number of blocked signals, press and
hold the DTS button.
10. Short press to enter CLEAR mode. Hold in DTS
button to clear all RF signals that were being
blocked.
11. Short press to RF ON/OFF mode (this is used for
Troubleshooting only). To turn RF off and enter pres-
sure control mode, make sure flow control knob is at
zero. Hold DTS button until screen displays RFOFF.
Turn power switch OFF, then turn back ON. The dis-
play will show an asterisk to indicate that it is in
pressure control mode.
To return to flow control mode, turn power switch
OFF for approximately 45 seconds.
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psi
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Prime Pump
10 3A0245A
Prime Pump
1. Mix material in separate bucket.
2. Add 1-2 gallons (4-8 liters) of material to hopper.
3. Place prime hose deflector into hopper or empty
bucket. NOTE: Keep deflector shield wet once it is in
use.
4. Turn power ON and turn prime valve handle to
PRIME. Turn flow control knob clockwise to start
pumping.
5. Install material screen (P).
6. Add the remaining material to hopper.
7. After unit is primed, turn prime valve handle to
APPLY FINISH position.
NOTICE
Do not use with quick-set materials. They can harden
inside the unit and hose.
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Using Finishing Tools
3A0245A 11
Using Finishing Tools
Corner Finishing
1. Attach corner finisher inlet swivel to inline valve
controller (JJ) valve using quick-connect clamp (QC)
attached to valve.
2. Press pin on top of corner finisher head to install
onto handle.
3. Use flow control knob (C) to set material flow rate.
Turn flow control knob clockwise to increase
material flow.
NOTE: Fine flow rate adjustments can be made
using “+” and “-” buttons on inline valve controller.
Flow rate can only be adjusted relative to position of
flow control knob. The fine flow rate can only go
down from, and up to the flow control knob setting.
4. Pull trigger and work from top to bottom of vertical
angles and from one end to other on ceiling angles.
5. Use drywall knife to detail corner and ceiling angle
intersections.
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QC
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C
+
-
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Using Finishing Tools
12 3A0245A
Flat Box Finishing
1. Attach male inlet of box finisher to the Z-swivel
assembly using quick-connect clamp attached to
Z-swivel.
2. Install Box Slide Controller (KK) on box finish handle
as shown.
NOTE: The Box Slide Controller Brake (TT) allows the
controller to be positioned on the handle. Make sure
that the brake is fully loosened when installing the con-
troller on the handle.
3. Install flat finish box on handle using attached wing
nuts.
4. Use flow control knob (C) to set material flow rate.
Turn flow control knob clockwise to increase
material flow.
5. Place flat box at end of joint.
6. Pull trigger and lead with handle and draw the tool
along the joint.
7. Near middle of the joint, remove flat box from joint
surface by applying brake and using a sweeping
motion.
8. Adjust hand position and begin again at other end of
joint.
9. Again, draw flat box along joint up to previous
stopping point and remove box from joint surface by
applying brake and using a sweeping motion.
10. Use drywall knife to eliminate seams and overlap.
NOTE: To remove RF Controller, use both thumbs and
press down as shown:
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TT
KK
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C
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Using Finishing Tools
3A0245A 13
Automatic Taping
1. Remove creaser wheel trigger pin.
2. Attach taper tool to inline valve.
3. Position creaser wheel trigger and insert pin into
trigger assembly.
4. Load tape into taper tool.
5. Use flow control knob (C) to set material flow rate.
Turn flow control knob clockwise to increase
material flow.
NOTE: Fine flow rate adjustments can be made
using “+” and “-” buttons on inline valve controller.
Flow rate can only be adjusted relative to position of
flow control knob. The fine flow rate can only go
down from, and up to the flow control knob setting.
6. Place one hand on taper control tube and one hand
on Inline Controller Valve (JJ) while in use.
7. Place tape at bottom of joint (slide tube forward to
feed tape).
8. Pull trigger and roll tape over seam keeping taper
head wheels in contact with wall.
9. When taper reaches approximately 3 in. (7.5 cm)
from end of seam, stop completely and pull tube
back to cut tape.
10. Use drywall knife to detail seams and overlap.
NOTE: Clean all tools thoroughly after every use. Use
a brush and water to remove all joint compound from
tools. Once tools have been cleaned, lightly oil using
any light machine oil.
NOTE: When taping ceilings or corner seams, the
creaser wheel can be actuated to push the tape into
the seam by using the creaser wheel trigger.
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C
+
-
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Storage
14 3A0245A
Storage
1. Perform Pressure Relief Procedure, page 6 (prime
valve handle in down position). Leave prime valve
handle in PRESSURE RELIEF position.
2. Spray water mist on top of any remaining material in
the hopper and cover hopper with lid.
3. Cover valve and tool ends to keep joint compound
from hardening.
4. Submerge deflector of prime hose in bucket or cover
to keep join compound from hardening.
Cleanup
1. Perform Pressure Relief Procedure, page 6 (prime
valve handle in down position).
2. Flush unused material from hopper, hose, and
prime hose.
3. Remove remaining material from hopper.
4. Turn pump control fully counter-clockwise to shut
pump off.
5. Fill material hopper with water and run pump to
flush unit. Run water through material hose, tools
and drain line thoroughly flush system.
6. Clean all tools.
7. Remove drain plug from hopper. Flush with water.
Clean and install drain plug.
NOTICE
Do not use with quick-set materials. They can harden
inside the unit and hose.
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Troubleshooting
3A0245A 15
Troubleshooting
Motor Will Not Operate (See flow chart, page 25)
PROBLEM CAUSE SOLUTION
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.

Troubleshooting
16 3A0245A
Low or Fluctuating Output
PROBLEM CAUSE SOLUTION
Low output Pump is worn or clogged. Service pump. Check piston and intake
valves for wear or obstructions.
Material hose length. Longer hose
length reduces drywall feed pump per-
formance.
Reduce hose length or thin material.
Use 20A setting if available.
Pump hopper adapter connections are
loose.
Tighten any loose connections.
Replace pump hopper adapter if
cracked or punctured.
Check electrical supply voltage with volt
meter. Meter must read:
210-255 Vac for 220-240 Vac models;
85-130 Vac for 100-120 Vac models.
Low voltages reduce drywall feed pump
performance.
Try a different outlet.
Extension cord size and length; must be
at least 12 awg (1.0 mm2) wire and no
longer than 90 m (295 ft). Longer cord
lengths reduce drywall feed pump
performance.
Replace with a correct, grounded
extension cord.
Leads from motor to flow control circuit
board for damaged or loose wires or
connectors. Inspect wiring insulation
and terminals for signs of overheating.
Be sure male terminal blades are cen-
tered and firmly connected to female
terminals. Replace any loose terminal
or damaged wiring. Securely reconnect
terminals.
Flow control knob is turned down. Turn flow control knob fully clockwise.
Make sure flow control knob is properly
installed to allow full clockwise position.
Plugged prime/tool fill/ recirculation
valve
Material has dried and plugged the
prime/tool fill/ recirculation valve.
Aim hose into waste pail. Turn prime
valve handle from TOOL FILL to PRES-
SURE RELIEF and then back to TOOL
FILL. If valve remains plugged, see
Pressure Relief Procedure, page 6.
Plugged hose, swivel, tool, or inline
valve
Debris or pack-out in tool, swivel, hose,
or inline valve
Check and clean out all flow compo-
nents. Perform Pressure Relief Proce-
dure, page 6.

Troubleshooting
3A0245A 17
Low or Fluctuating Output (continued)
Electrical Short
PROBLEM CAUSE SOLUTION
Motor runs and pump strokes No material supply. Refill hopper and re-prime pump.
Clean hopper strainer.
Loose fittings. Tighten; use thread sealant or sealing
tape on threads if necessary.
Intake valve ball and piston ball are not seat-
ing properly.
Remove intake and piston valves and
clean. Check balls and seats for nicks or
obstructions; replace if necessary, page
18. Also check piston valve seat for
hardened material or nicks and replace
if necessary. Clean hopper before using
to remove particles that could clog
pump.
Leaking around throat packing nut which may
indicate worn or damaged packings.
Replace packing, page 18.
Pump rod damage. Repair pump.
Motor runs but pump does not
stroke
Displacement pump pin (damaged or miss-
ing).
Replace pump pin if missing. Be sure
retainer spring (76) is fully in groove all
around connecting rod.
Connecting rod assembly is damaged. Replace connecting rod assembly.
Gears or drive housing. Inspect drive housing assembly and
gears for damage. Replace if needed.
Motor intermittently stops while
applying material
See RF Problems, page 18.
PROBLEM CAUSE SOLUTION
Building circuit breaker opens as
soon as power switch is turned on.
CAUTION
Any short in any part of the motor
power circuit will cause the control
circuit to inhibit drywall feed pump
operation. Correctly diagnose and
repair all shorts before checking
and replacing control board.
Electrical wiring insulation damaged, termi-
nals fit loose or are damaged. Also wires
between motor control and motor.
Repair or replace damaged wiring or
terminals. Securely reconnect all
wires.
Motor armature is shorted. Replace motor. Inspect windings for
burns. Perform motor control board
diagnosis.
Motor control board. Replace with a new control board if
necessary. Perform motor control
board diagnosis.
Building circuit breaker opens as
soon as unit is plugged into outlet
and unit is NOT turned on.
Basic Electrical Problems, see page 15. Perform necessary procedures.
For damaged or pinched wires in pressure
control.
Replace damaged parts.
Drywall feed pump quits after unit
operates for 5 to 10 minutes.
Basic Electrical Problems. Perform necessary procedures.
Check electrical supply with volt meter.
Meter must read:
210-255 Vac for 220-240 Vac models;
85-130 Vac for 100-120 Vac models.
If voltage is too high, do not operate
drywall feed pump until corrected.

Troubleshooting
18 3A0245A
RF Problems
PROBLEM CAUSE SOLUTION
Unwanted signal will not allow unit
to learn the controller.
Unwanted RF signal. Undesired controller is
active and in close proximity.
Stop unwanted RF signal by deactivat-
ing the controller. Use BLOCK feature
on Secondary Menu, see page 8.
RF controller will not learn. Battery is depleted. Replace battery
(CR123A Lithium 3V).
Unit has not learned the controller. Learn the controller, see page 8.
Controller RF has been blocked. See CLEAR procedure, page 9.
Controller is too far away or is not facing the
unit.
Move to within 10 ft and face the unit.
Hold the controller away from your
body.
Interference in RF signal Signal is out of range. Reposition the unit. Use optional exter-
nal remote antenna.

Troubleshooting
3A0245A 19
Electrical Problems
Symptom: Unit does not run or stops running.
Perform Pressure Relief Procedure; page 6.
• Plug unit into correct voltage, grounded outlet
• Set power switch OFF for 45 seconds and then ON
again (this ensures drywall feed pump is in default
flow control mode).
• Turn flow control knob clockwise 1/2 turn
• Trigger learned controller
• View digital display
If no digital display is available, use the con-
trol board status light to troubleshoot prob-
lems. turn ON/OFF switch to OFF, remove
control cover and then turn power back ON.
Observe status light. Blinking LED total
count equals digital error code (example: two
blinks equals E=02).
To avoid electrical shock or moving parts hazards when
covers are removed for troubleshooting, wait 45 sec-
onds after unplugging power cord for stored electricity
to dissipate. Keep clear of electrical and moving parts
during troubleshooting procedures.
TYPE OF PROBLEM WHAT TO CHECK HOW TO CHECK
Drywall feed pump does not
run at all
See flow chart, page 25.
Digital display is blank
Control board status light
never lights
Drywall feed pump does not
run at all
Check transducer or transducer
connections.
1. Make sure there is no pressure in the system (see
Pressure Relief Procedure, page 6). Check fluid
path for clogs.
2. Make sure a minimum of 50 ft of hose is connected
to the unit.
3. Set drywall feed pump to OFF and disconnect power
to drywall feed pump.
4. Check transducer and connections to control board.
5. Disconnect transducer from control board socket.
Check that transducer and control board contacts
are clean and secure.
6. Reconnect transducer to control board socket.
Connect power, turn unit ON, set pump to PRIME
position, and turn control knob 1/2 turn clockwise. If
drywall feed pump does not run properly, turn unit
OFF and go to next step.
7. Install new transducer. Connect power, turn unit ON,
set pump to PRIME position, and turn control knob
1/2 turn clockwise. Replace control board if drywall
feed pump does not run properly.
Digital display shows E=02
Control board status light
blinks 2 times repeatedly

Troubleshooting
20 3A0245A
Drywall feed pump does not
run at all
Check transducer or transducer
connections (control board is not
detecting a pressure signal).
1. Turn unit OFF and disconnect power.
2. Check transducer and connections to control board.
3. Disconnect transducer from control board socket.
Check to see if transducer and control board
contacts are clean and secure.
4. Reconnect transducer to control board socket.
Connect power, turn unit ON, set pump to PRIME
position, and turn control knob 1/2 turn clockwise. If
drywall feed pump does not run, turn unit OFF and
go to next step.
5. Connect a confirmed working transducer to control
board socket.
6. Connect power, turn unit ON, set pump to PRIME
position, and turn control knob 1/2 turn clockwise. If
drywall feed pump runs, install new transducer.
Replace control board if unit does not run.
7. Check transducer resistance with ohmmeter (less
than 9k ohm between red and black wires and 3-6k
ohm between green and yellow wires).
Digital display shows E=03
Control board status light
blinks 3 times repeatedly
TYPE OF PROBLEM WHAT TO CHECK HOW TO CHECK