Graco PR70 Series Troubleshooting guide

334116D
EN
Operation - Maintenance
PR70 Servo
Fixed or variable ratio systems. For accurate metering, mixing, and dispensing of
two-component materials. For professional use only.
Not approved for use in European explosive atmosphere locations.
Models U81923 and U82204
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
U81923
U82204

Related Manuals
2 334116D
Contents
Related Manuals ...........................2
Warnings .................................3
Component Identification .....................
U81923 ................................5
Component Identification .....................
U82204 ................................6
Installation ................................7
HMI Navigation Overview ....................9
ChangeHMIValues .....................10
MainMenu ............................11
Status ................................12
SetupHome ...........................13
FeedControl ...........................14
Setup.................................15
Temperature U81923 Only . . . . . . . . . . . . . . . . 16
Shot/FlowSetup1.......................17
Shot/FlowSetup2.......................19
Temperature Gains U81923 Only . . . . . . . . . . . 20
Scaling ...............................21
AlarmHistory ..........................23
AlarmStatus ........................... 24
Startup .................................. 25
Setup....................................26
EnterData.............................26
Prime the Dispense Head . . . . . . . . . . . . . . . . . 26
PhasingAdjustment .....................28
Adjust Dispense Valve Snuff Back (MD2 Valve
Only) ..............................30
Calibrate Dispense Weight Ratio . . . . . . . . . . . 30
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 33
FlushingProcedure ........................34
Shutdown ................................35
Maintenance ..............................36
Schedule ..............................36
CleanthePumpShafts ...................36
Disassemble and Clean the Dispense Head (MD2
ValveOnly) .........................36
Flush Pneumatic Air Motor 82/0216/11 . . . . . . . 37
Lubricate Pneumatic Air Motor . . . . . . . . . . . . . 37
Lubricate Gear Box of Pneumatic Air Motor
01/0368-1/11........................37
Troubleshooting ...........................38
Kits .....................................40
Appendix A - Homing Pumps . . . . . . . . . . . . . . . . 42
Appendix B - Logging In and Out . . . . . . . . . . . . . 43
Appendix C - Data Logging U81923 Only . . . . . . 44
Appendix D - Setting Temperature Gains U81923
Only..................................45
Dimensions...............................46
Stationary PR70 Servo . . . . . . . . . . . . . . . . . . . 46
Cart Mounted PR70 Servo . . . . . . . . . . . . . . . . 46
TechnicalData ............................47
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 48
GracoInformation .........................48
Related Manuals
PR70 and PR70v Operation and Parts Manuals
Part Description
3A0429 PR70 with Standard Display Module Operation and
Maintenance Manual
312759 PR70 and PR70v with Advanced Display Module
Operation and Maintenance Manual
312760 PR70 and PR70v Repair and Parts Manual
312394 PR70 and PR70v Feed Systems Manual
312761 PR70v Integrated Heat Instructions - Parts Manual
MD2 Dispense Valve Manual
Part Description
312185 MD2 Dispense Valve Instructions and Parts Manual

Warnings
334116D 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol 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 or on warning labels, 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.
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 at main switch before disconnecting any cables and before servicing
or installing equipment.
• Connect only to grounded power source.
• All electrical wiring must be done by a qualified electrician and comply with all local codes and
regulations.
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.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read MSDSs to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
• Always wear chemically impermeable gloves when spraying, dispensing, or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. This protective 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.
WARNING

Warnings
4 334116D
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:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are antistatic or conductive.
•Stop operation immediately if static sparking occurs or you feel a shock.Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system com-
ponent. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manu-
facturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
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.
BURN HAZARD
Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
WARNING

Component Identification U81923
334116D 5
Component Identification
U81923
Key:
A Tanks
B Main Power Disconnect
C Foot Switch
D PR70 Servo with Shield
E Agitator
F Power On / E-stop Switch
G Tank Stand
H Cart
J USB Port for Data Collection
K Human Machine Interface (HMI)
L Heated Over / Under Block
M Inlet for Hardener / Catalyst
N Inlet for Base / Resin
P Inlet for Flush
R Static Mixer
S Mixer Heater
T Pressure Transducer
U Mixed Material Temperature Probe
V Material Outlet
FIG. 1: Typical Installation
E
E
A
H
C
A
G
D
B
F
J
K
P
L
S
V
T
UN
M
R

Component Identification U82204
6 334116D
Component Identification
U82204
Key:
A Tanks/Feed
B Main Power Disconnect
C Foot Switch
D PR70 Servo with Shield
E Power On / E-stop Switch
F Human Machine Interface (HMI)
G Pressure Transducer
H Material Outlet
I Dispense Valve
FIG. 2: Typical Installation
I
H
G
D
A
C
F
E
B

Installation
334116D 7
Installation
1. Locate PR70 Servo.
Locate on a level surface and lock casters. See Dimen-
sions on page 46 for space requirements.
2. Electrical Requirements.
NOTE:
PR70 Servo without heat requires 240VAC single
phase, 15 amps, 50/60 hertz.
PR70 Servo with heat requires 240VAC single phase,
40 amps, 50/60 hertz.
3. Connect Electrical Cord.
NOTE: Power cord is not supplied.
Electrical Cord Wires
240V, 1 phase: L1, L2, GND
Typical Voltage Readings 240V, 1 phase:
L1-L2: 240V
L1 or L2-GND: 115V
Use a screwdriver to connect the two power leads to L1
and L2. Connect green to ground (GND).
Installing this equipment requires access to parts
which may cause electric shock or other serious injury
if work is not performed properly. Have a qualified
electrician connect power and ground to main power
switch terminals, see step 3 in this installation
procedure. All electrical wiring must be done by a
qualified electrician and comply with all local codes
and regulations.
NOTICE
Never connect to 480V, 3 phase power. Severe
equipment damage will occur.
L1
L2
GND

Installation
8 334116D
4. Ground the System.
Control enclosure and Pump: grounded through power
cord. See Connect Electrical Cord.
Fluid supply container: follow local code.
Solvent pails used when flushing: follow local code. Use
only conductive metal pails, placed on a grounded sur-
face. Do not place the pail on a nonconductive surface,
such as paper or cardboard, which interrupts grounding
continuity.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the spray gun/dis-
pense valve firmly to the side of a grounded metal pail,
then trigger the gun/valve.
5. Connect Air (if applicable for MD2 valve).
If the system requires air to open and close a dispense
valve, connect a compressed airline to the inlet found in
the rear of machine.
6. Connect the Dispense hoses.
Connect the heated hoses to the outlets of the pumps.
Plug the heater connections into the proper outlets on
the control panel.
NOTE: The non-drip valves on the ends of the hoses
are different diameters and only plug into the over /
under block in one location.
7. Connect the Over / Under Block, U81923 Only.
Connect the other ends of the heated hoses with the
non-drip valve fittings into the over / under block. Plug
the over / under block heater with probe and mixer
heater with probe into the proper outlets on the panel.
Connect the pressure transducer and mixed material
temperature probe connections into the proper outlets
on the panel.
8. Flush the System.
The machine is tested at the factory with mineral oil.
Flush the machine before the first use.
The equipment must be grounded to reduce the risk of
static sparking and electric shock. Electric or static
sparking can cause fumes to ignite or explode.
Improper grounding can cause electric shock.
Grounding provides an escape wire for the electric
current.
11/16 Dia. Non
Drip Valve
02/0707-00/50
5/8 Dia. Non Drip
Valve
U81744
Flush Hookup
1/4 NPT male

HMI Navigation Overview
334116D 9
HMI Navigation Overview

HMI Navigation Overview
10 334116D
The screens all have the same menu at the bottom that
navigates from ones screen to another.
NOTE: Some icons may not appear depending on the
model.
Change HMI Values
To edit a value such as flow rate or percentages, press
the button.
When the keypad comes up, enter the new value.
NOTE: The limits are displayed between the readout
and keypad.