Graco 309909H User Manual

Repair - Parts

Self-contained, single color, electronic plural component paint proportioner. For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual. Save these instructions.

See page 3 for model information, including maximum working pressure and approvals.

309909H

ENG

TI4909a

Manual Conventions

Contents

Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . 2

ProMix Easy Models . . . . . . . . . . . . . . . . . . . . . . . . 3

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . 7

Fluid Manifold to Gun . . . . . . . . . . . . . . . . . . . . . 7

Pump to Fluid Manifold . . . . . . . . . . . . . . . . . . . . 8

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Preventive Maintenance Schedule . . . . . . . . . . . 9

Mix Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Dispense Valve . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Turbine Alternator . . . . . . . . . . . . . . . . . . . . . . . . 9

Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Pump Test/Meter Calibration . . . . . . . . . . . . . . . . 9

Wet Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Icing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Replacing Air Filter Element . . . . . . . . . . . . . . . 15

User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Pneumatic Control . . . . . . . . . . . . . . . . . . . . . . 19

Dispense Valve/Mix Manifold Assembly . . . . . . 21

Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . 21

Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . 22

248349 Main Control Board Schematic . . . . . . . . 23

246899 Pump Solenoid Expansion Board

Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Part No. 234596 Series A, Pump-based,

Cart-mounted Air Spray Unit . . . . . . . . . . . . 24

Pump and Meter-based, Wall-mounted

Air Spray Units . . . . . . . . . . . . . . . . . . . . . . 27

Pump-based, Wall-mounted Air Spray Units . . . 30 Meter-based, Wall-mounted High Pressure

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Pump-based, Wall-mounted High Pressure

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Pump and Meter-based, Wall-mounted High

Pressure Units . . . . . . . . . . . . . . . . . . . . . . 40

Tube Connections, Low Pressure Pumps . . . . . 44

Tube Connections, High Pressure Pumps . . . . . 45

Tube Connections, Meters . . . . . . . . . . . . . . . . . 46

Pneumatic Schematic . . . . . . . . . . . . . . . . . . . . 47

248270 Intrinsically Safe Pneumatic Control . . . 48 248316 Non-intrinsically Safe

Pneumatic Control . . . . . . . . . . . . . . . . . . . 50

User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 52

287230 Pump Air Control . . . . . . . . . . . . . . . . . 53

287231 Meter Air Control . . . . . . . . . . . . . . . . . 53

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 56

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 56

Manual Conventions

WARNING

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in property damage or

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Warnings included in instructions generally have a symbol indicating the hazard. Follow the instructions and read the hazard section on warning pages 5 to 6 for additional information.

2 309909H

destruction of equipment.

Note

A note indicates additional helpful information.

CAUTION

ProMix Easy Models

WARNING

Do not install equipment approved only for non-hazardous location in a hazardous area. Substitution of components may impair intrinsic safety and cause personal injury. Read page 5.

Approved for Hazardous Location

Class I, Div 1, Group D (North America); Class I, Zones 1 and 2 (Europe)

ProMix Easy Models

ProMix

Easy

Part No. Series Description

234596 A

234597 A 234598 A 234599 A 234601 A 234602 A

234603 A 234604 A 234605 A 234606 A 234608 A 234609 A 234611 A 234612 A 234613 A 234618 A 234619 A

Cart mount, UltraMix Wall mount, UltraMix cst* Pump/G3000 Meter Wall mount, UltraMix sst** Pump/G3000 Meter Wall mount, UltraMix cst* Pumps Wall mount, UltraMix sst** Pumps

Wall mount, HydraMix Wall mount, HydraMix 500 sst** Pump/G3000 Meter Wall mount, HydraMix 600 cst* Pump/G3000 Meter Wall mount, HydraMix 600 sst** Pump/G3000 Meter Wall mount, HydraMix 500 cst* Pumps Wall mount, HydraMix 500 sst** Pumps Wall mount, HydraMix 600 cst* Pumps Wall mount, HydraMix 600 sst** Pumps Wall mount, HydraMix 700 cst* Pumps Wall mount, HydraMix 700 sst** Pumps Wall mount, G3000 Meter, cst* mix manifold Wall mount, G3000 Meter, sst** mix manifold

™

cst* Pumps, hose and gun

™

500 cst* Pump/G3000 Meter

Approved for Non-hazardous Location

234600 A 234825 A 234607 A 234826 A 234610 A 234827 A

Wall mount, UltraMix cst* Pumps Wall mount, UltraMix sst** Pumps Wall mount, HydraMix 500 cst* Pumps Wall mount, HydraMix 500 sst** Pumps Wall mount, HydraMix 600 cst* Pumps Wall mount, HydraMix 600 sst** Pumps

Maximum Working

Pressure

psi (MPa, bar) Approvals

250 (1.7, 17)

250 (1.7, 17) 250 (1.7, 17) 250 (1.7, 17) 250 (1.7, 17)

Conforms to

FM std 3600 & 3610

for use in

Class I Div 1

Group D T3

Hazardous Locations

2400 (16, 166)

2400 (16, 166) 3400 (23, 234) 3400 (23, 234)

ISSeP 04 ATEX 020X

EEx ia p IIA T3

2400 (16, 166) 2400 (16, 166) 3400 (23, 234) 3400 (23, 234) 4700 (32, 324) 4700 (32, 324) 4000 (28, 280)

CAN/CSA

22.2 No. 157-92 & No. 1010.1-92

4000 (28, 280)

250 (1.7, 17)

250 (1.7, 17) 2400 (16, 166) 2400 (16, 166) 3400 (23, 234) 3400 (23, 234)

9902471 Conforms to UL61010A-1

Certified to

CAN/CSA

22.2 No. 1010.1-92

0359

* cst=carbon steel. ** sst=stainless steel.

309909H 3

Related Manuals

Component Manuals in English This manual available in the following languages:

Manual Description

309908 ProMix Easy Operation 309909 ProMix Easy Repair-Parts 310654 Fluid Mix Manifold 310655 Dispense Valve 310662 UltraMix and HydraMix Displacement

Pumps 310671 UltraMix Pumps 310672 HydraMix Pumps 310673 Circulation Kits 310674 Stand and Caster Kits 310675 AC Power Supply 310676 Remote Manifold Kit 310677 Heater Installation Kit 310678 TSL Pump Kits 309192 ISO Supply Kit 309623 Data Download Kits

Manual Language

309909 English 310680 French 310682 Spanish 310684 German 310686 Italian 310688 Chinese 310690 Japanese 310769 Dutch 310771 Finnish 310773 Swedish

308778 G3000 Flowmeter 308034 Turbine Alternator Repair Kit

4 309909H

Warnings

The following general warnings are related to the safe setup, use, grounding, maintenance, and repair of this equipment. Additional more specific warnings may be found throughout the text of this manual where applicable.

WARNING

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 lights on or off when flammable fumes are present.

• Ground equipment and conductive objects in work area. See Setup instructions in ProMix Easy Operation manual 309908.

• Use only grounded hoses.

• Hold gun firmly to side of grounded pail when triggering into pail.

• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and correct the problem.

• Keep a fire extinguisher in the work area.

SKIN INJECTION HAZARD

High-pressure fluid from gun, 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.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the spray tip.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Do not spray without tip guard and trigger guard installed.

• Engage trigger lock when not spraying.

• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment.

MOVING PARTS HAZARD

Moving parts can pinch 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 in this manual. Disconnect power or air supply.

309909H 5

Warnings

WARNING

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system

component. 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.

• Check equipment daily. Repair or replace worn or damaged parts immediately.

• Do not alter or modify equipment.

• For professional use only.

• Use equipment only for its intended purpose. Call your Graco distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kind or overbend hoses or use hoses to pull equipment.

• Comply with all applicable safety regulations.

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 MSDS’s 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.

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, inhalation of toxic fumes, burns, and hearing loss. This equipment includes but is not limited to:

• Protective eyewear

• Clothing and respirator as recommended by the fluid and solvent manufacturer

•Gloves

• Hearing protection

6 309909H

Pressure Relief Procedure

WARNING

Relieve pressure from fluid manifold to gun whenever you stop spraying and before servicing gun or removing spray tip.

In addition, relieve pressure from pump to fluid manifold at end of day and before cleaning, checking, or servicing pump, manifold, or fluid line accessories or transporting equipment.

Read warnings, page 5.

Fluid Manifold to Gun

1. Engage trigger lock.

3. Disengage trigger lock.

4. Hold a metal part of the gun firmly to a grounded

metal pail. Trigger gun to relieve pressure.

5. Engage trigger lock.

2. Press .

309909H 7

Pressure Relief Procedure

Pump to Fluid Manifold

1. Close shutoff valves G

2. Place waste container under sampling valves H

and H

3. Turn function knob to pressure relief/park .

and GB.

TI4699a

5. Open sampling valve A slowly to bleed off pressure.

Indicator A will stay on for 5 sec after Pump A reaches Park position, then go off.

Pump air supply pressure must be sufficient to cause pumps to stroke to bottom-most position when function knob to is set to pressure relief/park

6. Indicator B comes on and Pump B pressurizes.

7. Open sampling valve B slowly to bleed off pressure.

Indicator B will stay on for 5 sec after Pump B reaches Park position, then go off.

4. Press . Indicator A comes on, and Pump A pres-

surizes.

If both pumps are not parked after 1 min, Alarm 26 will sound.

8. Close sampling valves A and B before restarting

system.

8 309909H

Maintenance

Preventive Maintenance Schedule

Establish a preventive maintenance schedule, based on the pump’s repair history.

Mix Manifold

See mix manifold manual 310654.

Dispense Valve

See dispense valve manual 310655.

Pump

See applicable pump manual 310671, 310672, or

310662.

Turbine Alternator

Replace bearings every 2000 hours. See page 19.

Air Filters

Check daily. Drain and clean as necessary. See page

15.

Pump Test/Meter Calibration

See ProMix Easy Operation manual. If pumps/meters fail test, see Troubleshooting, page 10.

Wet Cup

Check pump and dispense valve wet-cups daily. Keep filled with Graco Throat Seal Liquid (TSL), Part No.

206995.

Storage

Before storing the pump, always flush it, see ProMix Easy Operation manual. Relieve the pressure, page 7.

Icing

If you experience icing at the pump air manifold:

• Reduce pump input air pressure below 80 psi (0.56 MPa, 5.6 bar), if required spray pressure allows.

• Reduce moisture in compressed air supply, or use heated air.

If icing persists, see table below.

Problem Solution

Pump slows on both up and down stroke.

Pump slows on down stroke.

Pump slows on up stroke. Turn U port bleed screw 90° (1/4 turn) counter-

309909H 9

Turn D port bleed screw 60° (1/6 turn) counterclockwise, to bleed 1 cfm air to melt ice.

Turn D port bleed screw 60° (1/6 turn) counterclockwise, to bleed 1 cfm air to melt ice. If icing continues, turn screw to 90° (1/4 turn) to increase air flow to 2 cfm. If necessary, increase air flow to 3 cfm by turning screw to 270° (3/4 turn). Do not exceed 3 cfm (3/4 turn maximum).

clockwise, to bleed 1 cfm air to melt ice. If icing continues, turn screw to 120° (1/3 turn) to increase air flow to 2 cfm. If necessary, increase air flow to 3 cfm by turning screw to 180° (1/2 turn). Do not exceed 3 cfm (1/2 turn maximum).

TI5294a

Troubleshooting

WARNING

If an alarm code displays, see page 13.

Read warnings, page 5-6.

Problem Cause Solution

Display not lit. No electric power.

Pumps do not run. Air pressure to pumps too low. Increase pressure to 50 psi (0.35 MPa,

Pump test volume is not correct. Air pressure to pumps too low Increase pressure to 50 psi (0.35 MPa,

Air valve not turned on. Turn on main air valve to system. Air supply pressure too low. Increase pressure to 60 psi (0.42 MPa,

4.2 bar) or greater.

Air supply filters plugged. Clean filter bowls; replace filter elements.

Page 15. Turbine air regulator set too low. Adjust to proper setting. Turbine alternator failure. Repair or replace turbine. Page 19. Power supply not connected to main

board. Main board not connected to display

board.

Display board failure. Replace display board. Page 18. Power not connected to unit (non-IS units

only).

Solenoid valve stuck. Actuate solenoid manually, if it does not

Dispense valve(s) not opening. Service or replace valve(s). See 310655.

Sensors not functioning properly. Check position of sensors. See ProMix

Pump cavitating excessively. Check for air in lines caused by loose fit-

Check power connections to main board.

See Electrical Schematic, page 22.

Check electrical connections between

display and main board. See Electrical

Schematic, page 22, and 248349 Main

Control Board Schematic, page 23.

Ensure that power cord is plugged in.

Check that cord is connected properly;

see ProMix Easy Operation manual.

3.5 bar).

operate, replace solenoid. Page 20.

3.5 bar).

Easy Operation manual, and applicable

pump manual.

Check board calibration and recalibrate if

necessary. See ProMix Easy Operation

manual.

Replace sensors. See pump manual

310671 or 310672.

ting or use of agitator.

Material too viscous. Use heater.

10 309909H

Troubleshooting

Problem Cause Solution

Paint does not cure consistently. Ratio not set correctly. Check that correct ratio is set and set by

volume. See ProMix Easy Operation manual.

Material not mixing correctly. Test pump. Page 9.

Make sure mixer is clean; flush as needed. See ProMix Easy Operation manual.

Pump not operating correctly. Observe whether pumps are loading and

checking correctly, if not, clean and repair pump. See displacement pump manual

310662.

Poor spray pattern. Fluid pressure too low. Increase pump pressure.

Spray tip dirty or worn. Relieve pressure. Clean or replace tip.

Follow gun manual instructions. Fluid A or B filters plugged. Clean filters. Mixer or hoses partially plugged or too

restrictive.

System runs erratically. Air filter(s) clogged. Replace elements. Clean. Replace element(s). See page 15.

Air supply hoses undersized. Replace hoses with appropriate size. Air compressor undersized. Use larger air compressor. Air supply pressure tank undersized. Use larger pressure tank.

Air supply relief valve opens. Turbine air regulator set too high. Lower setting to 23-25 psi (172-241 kPa,

Turbine alternator makes high-pitched whining noise.

Display shows 88888 or unit reboots unexpectedly.

ProMix Easy does not start when start button is pressed.

Dispense valves leaking. Loose or worn packings. Tighten packing nut. If leak continues,

Turbine bearings worn. (Setting turbine air regulator too high, wears bearings.)

Turbine is not supplying enough power to board.

Faulty start switch or wire harness. Check start switch and wiring harness

Faulty stop switch or wiring harness. Check stop switch and wiring harness

Bad I/O port on display board. Replace board. Page 18. Bad I/O port on main board. Replace board. Page 17.

Inspect parts for cured material. Clean or

replace, or use larger hoses and mixer.

1.7-2.4 bar).

Replace bearings. Page 19.

Increase turbine regulator setting to

23-25 psi (172-241 kPa, 1.7-2.4 bar).

Check turbine and electrical control

exhaust air for restrictions.

Replace turbine bearings. Page 19.

continuity; switch is normally open circuit.

See Electrical Schematic, page 22.

continuity; stop switch is normally closed

circuit. See Electrical Schematic, page

22.

replace packings. See 310655.

309909H 11

Troubleshooting

Problem Cause Solution

Flow rate too low. Inadequate air supply. Use larger CFM compressor.

Air pressure to pumps too low. Increase pressure. Fluid A or B filters plugged. Clean filters. Spray tip too small. Relieve pressure. Install larger tip. Follow

gun manual instructions.

Mixer or hoses partially plugged or too restrictive.

Insufficient dispense valve travel. Increase travel. See 310655. Shutoff valves are not fully open. Ensure that shutoff valves are fully open

Inspect parts for cured material. Clean or replace, or use larger hoses and mixer.

and sampling valves are closed.

Pump stops after 12 cycles.

Pump cycle rate slows and eventually stops.

Knob is set to Run pump A

or B

Turn knob to spray rial.

independently.

Icing at pump air manifold. See Icing, page 9.

if spraying mate-

12 309909H

Alarms

* Indicates error where audible alarm sounds once briefly. ** Indicates error where audible alarm sound pulses.

Code Alarm Active Problem Cause

Startup Errors

01 Sensor Error A* Always No signal from pump A

sensor

02 Sensor Error B* Always No signal from pump B

sensor

03 Communication Error* Always Loss of communication

between main and display boards

Operating Errors

04 not used 05 not used 06 Pump Error A** Spray 07 Pump Error B**

08 Sensor Code Error Always Sensor values reverted to

09 Metering Error A** Spray A dose too great Dispense valve A leak

Te st

Batch

Pump does not stall after top change over

Pump cavitating excessively

default

Loose cable, failed sensor or cable, failed magnet assembly

Loose cable, failed board

Intake valve leak

Air in lines caused by loose fitting or use of agitator

Empty fluid supply Sensor value data corrupt; board needs replacement

and /or recalibration

Empty B fluid supply

Alarms

Clogged flow meter

10 Metering Error B** Spray B dose too great Dispense valve B leak

Empty A fluid supply

Clogged flow meter 11 Sensor Reading Low A* Spray 12 Sensor Reading Low B*

13 Sensor Reading High A* Spray 14 Sensor Reading High B*

21 Pot Life Error Spray

Te st

Batch

Te st

Batch

first, then

Always

Pump stroke travels beyond sensor range at top change over

Pump stroke travels beyond sensor range at bottom change over

Pot life timer timed out Not enough material sprayed after last reset

Sensor or bracket loose

Sensor magnet dirty

Sensor or bracket loose

Sensor magnet dirty

309909H 13

Alarms

Code Alarm Active Problem Cause

Operating Errors

(continued)

22 High Ratio (units with

meter[s] only)

23 Low Ratio (units with

meter[s] only)

24 Dose Timeout A (units

with meter[s] only)

25 Dose Timeout B (units

with meter[s] only)

26 Park Timeout

(pump-based units only)

Testing Error

15 Piston packing/ball A* Test Pump does not com16 Piston packing/ball B* 17 Inlet Ball A* Test Pump does not com18 Inlet Ball B* 19 Dispense Valve A* Test Pump does not com20 Dispense Valve B*

27 Pump Calibration

Timeout A

28 Pump Calibration

Timeout B

Spray Mix ratio higher than

Tar g et + Tole r anc e

Spray Mix ratio lower than

Target - Tolerance

Spray Air flow switch indicates

more than 40 sec of air flow without dose completing

Park Pumps not at bottom of

stroke

pletely stall in up stroke

pletely stall in downstroke

pletely stall in both up and down strokes

Run A Pump doesn’t run

through calibration.

Run B

Flow rate too high

Slow actuation of dispense valve A or B

Clogged flow meter Air flow switch stuck open.

Atomizing air leak downstream of air flow switch.

Clogged flow meter.

Gun triggered without fluid (dusting parts) Sampling valves closed, or gun not triggered.

Piston packing or ball check failure

Intake valve ball check failure

Throat packing or dispense valve failure

Sampling valves closed.

14 309909H

Repair

Flush before repairing equipment, if possible. See ProMix Easy Operation manual.

WARNING

Read warnings, page 5.

Follow Pressure Relief Procedure, page 7, if service time may exceed pot life time, before servicing fluid components, and before transporting equipment to a service area.

Replacing Air Filter Element

There are 2 air filters on the unit: the 5 micron air manifold filter (7) and 40 micron pump air filter (9). Check filters daily and replace element as needed. Order 15D909 5 micron filter and 15D890 40 micron filter.

WARNING

Removing the bowl of a pressurized air filter could cause serious injury. Do not service air filter until air line is depressurized.

1. Close main air shutoff valve on air supply line and on unit.

2. Remove left side plate (21).

3. Unlock filter bowl guard and remove.

4. Unscrew filter bowl.

5. Remove and replace element.

6. Screw filter bowl on securely.

7. Reassemble.

309909H 15

Repair

User Interface

Removal

1. Close main air shutoff valve on air supply line and on unit.

2. Remove side panels (21).

3. Remove fasteners (45). Gently pull user interface (11) away from pneumatic control (10).

315

Software Upgrades

CAUTION

To avoid damaging circuit board, wear a grounding strap.

1. Remove User Interface cover. See above.

2. Use a chip remover (D) to remove software chip (C). F

IG. 2.

C D

IG. 2

TI4901a

IG. 1

4. To completely remove user interface (11), disconnect ground wire (315), and wires (416 and 406) from main control board (301). See Electrical Schematic, page 22.

3. Install new chip (beveled corner down).

4. Reassemble.

5. Recalibrate main circuit board. See ProMix Easy Operation Manual.

16 309909H

Replacing Main Circuit Board

CAUTION

To avoid damaging circuit board, wear a grounding strap.

1. Remove User Interface cover. See page 16.

2. Disconnect all wire connectors from board (301). F

IG. 3.

3. Remove four screws (302) and replace board (301).

4. Reassemble. Refer to Electrical Schematic, page

22.

5. Recalibrate system. See ProMix Easy Operation Manual.

NOTE: If the main control board is replaced on units that use a flow meter, the flow meter calibration data must be set using a PC and a Data Download Kit (Graco P/N 248403 for hazardous locations or Graco P/N 248404 for non-hazardous locations).

Repair

320

301

TI4561a

IG. 3

309909H 17

+ 39 hidden pages