ASM Zip-Spray 1900 Plus Setup guide

Repair Instructions and Parts List 309423M
- For portable spray application of architectural paints and coatings -
1900 PlustAirless Paint Sprayer
3000 psi (207 bar, 20.7 MPa) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
309971.......
309427.......
Hi-Boy 233782
Series A, B, C, D, E, F
309428.......
Model 233782 (Series A, B)
Model 246649 (Series A, B, C, D)
311062.......
Model 233782 (Series C, D, E, F)
ti7508a
ti8027a
Stand 246649
Series A, B, C, D
Parts

2 309423
Specifications
This equipment is not intended for use with flammable or combustible materials used in places such as
cabinet shops or other “factory” or fixed locations. If you intend to use this equipment in this type of
application, you must comply with NFPA 33 and OSHA requirements for the use of flammable and
combustible materials.
Warnings
The following Warnings are for the safe setup, use, grounding, maintenance and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure--specific risks.
Refer back to these Warnings. Additional, product--specific warnings may be found throughout the body 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:
DUse equipment only in well ventilated area.
DSprayer generates sparks. When flammable liquid is used in or near sprayer for flushing or clean-
ing, keep sprayer at least 20 feet (6 m) away from explosive vapors.
DDo not clean with materials having flash points lower than 70_F(21_C). Use water--based materi-
als or mineral spirit--type material only. For complete information about your fluid, request the
MSDS from the fluid distributor or retailer.
DEliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic
drop clothes (potential static arc).
DKeep work area free of debris, including solvent, rags and gasoline.
DDo not plug or unplug power cords or turn lights on or off when flammable fumes are present.
DGround equipment and conductive objects in work area. Read Grounding instructions.
DUse grounded hoses.
DHold gun firmly to side of grounded pail when triggering into pail.
DIf there is static sparking or you feel a shock, stop operating immediately. Do not use equipment
until you identify and correct the problem.
DKeep 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.
DDo not point gun at anyone or any part of the body.
DDo not put your hand over the spray tip.
DDo not stop or deflect leaks with your hand, body, glove, or rag.
DDo not spray without tip guard and trigger guard installed.
DEngage trigger lock when not spraying.
DFollow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking or servicing equipment.

3309423
WARNING
ELECTRIC SHOCK HAZARD
Improper grounding, setup, or usage of the system can cause electric shock.
DTurn off and disconnect power cord before servicing equipment.
DUse only grounded electrical outlets
DUse only 3--wire extension cords.
DEnsure ground prongs are intact on sprayer and extension cords.
DDo not expose sprayer to rain. Store indoors.
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
DDo not operate the unit when fatigued or under the influence of drugs or alcohol.
DDo not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Data in all equipment manuals.
DUse 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 the fluid distributor or retailer.
DCheck equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
DDo not alter or modify equipment.
DUse equipment only for its intended purpose. Call your distributor for information.
DRoute hoses and cables away from traffic areas, sharp edges, moving parts and hot surfaces.
DDo not kink or over bend hoses or use hoses to pull equipment.
DKeep children and animals away from work area.
DComply with all applicable safety regulations.
PRESSURIZED ALUMINUM PARTS HAZARD
Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in this equipment. Such use could result in a serious chemical reaction,
with the possibility of explosion, which could cause death, serious injury and/or substantial property
damage.
TOXIC FLUID HAZARD
Toxic fluid or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
DRead MSDS’s to know the specific hazards of the fluids you are using.
DStore hazardous fluid in approved containers and dispose of it according to all applicable guide-
lines.
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:
DProtective eye wear.
DClothing and respirator as recommended by the fluid and solvent manufacturer.
DGloves.
DHearing protection.

4 309423
Component Identification and Function
K
E
H
B
A
D
J
G
F
V
U
T
Fig. 1
K
E
HB
A
D
J
G
F
V
U
T
ti6013b
RPS
N
M
ti5875b

5309423
Component Identification and Function
AMotor DC motor, permanent magnet, fan cooled
BDrive Assembly Transfers power from DC motor to displacement pump
DDisplacement Pump Transfers fluid to be sprayed from source through spray gun
EFluid Outlet Spray gun is connected here
FPrime Valve Used to prime and drain sprayer (also relieves fluid outlet pressure) when
open
GFluid Filter (optional) Final filter of fluid to spray gun
HPressure Adjusting Knob Controls fluid outlet pressure
JPressure Control Controls motor speed to maintain fluid outlet pressure at displacement pump
outlet. Works with pressure adjusting knob.
KON/OFF Switch Power switch that controls main power to sprayer
M50 ft (15 m) Main Hose 1/4 in. ID, grounded, nylon hose with spring guards on both ends
NSpray Gun High pressure spray gun with gun safety latch
PSpray Tip Uses high pressure fluid to clear tip clogs without removing tip from spray gun
RTip Guard Tip guard reduces risk of injection injury
SThumb Lock Safety Gun safety latch inhibits accidental triggering of spray gun
TPower Cord Rack Holds wrapped power cord for storage
USuction Hose Transfers fluid to be sprayed from source to pump
VDrain Tube Fluid outlet used to drain and prime the sprayer

6 309423
DThe sprayer requires a 120V AC, 60 Hz, 15A
circuit with grounding receptacle. Never use
an outlet that is not grounded or an adapter.
DDo not use the sprayer if the electrical
cord has a damaged ground prong.
Only use a 3--wire extension cord with
an undamaged, 3--prong plug.
DRecommended extension cords for
use with this sprayer:
D25 ft (7.6 m) 18 AWG
D50 ft (15.2 m) 16 AWG
D100 ft (30.5 m) 14 AWG
D150 ft. (45.7 m) 12 AWG
Smaller gauge or longer extension cords
may reduce sprayer performance.
Grounding and Electric Requirements
DGround sprayer gun through connection to
a properly grounded fluid hose and pump.
DGround fluid supply container.
Follow local code.
DGround solvent pails used when flush-
ing. Follow local code. Use only conduc-
tive, metal pails, placed on a grounded
surface such as concrete. Do not place the
pail on a non--conductive surface such as
paper or cardboard, which interrupts the
grounding continuity.
ti5850a
ti5572a
ti3001b
The sprayer must be grounded. Grounding reduces the risk of static
and electric shock by providing an escape wire for the electrical cur-
rent due to static build up or in the event of a short circuit.

7309423
DGround the metal pail by clamping one end
of ground wire to pail and the other end to
ground, such as a water pipe.
DMaintain grounding continuity when
flushing or relieving pressure by hold-
ing metal part of spray gun firmly to
side of a grounded metal pail, then
trigger gun.
Grounding and Electric Requirements
Thermal Overload
DMotor has a thermal overload switch
to shut itself down if overheated.
DTo reduce risk of injury from motor
starting unexpectedly when it cools,
always turn power switch OFF if
motor shuts down.
ti5851a
ti6762a

8 309423
1. Turn power switch OFF and unplug power cord.
2. Turn Spray--Prime/Drain valve to PRIME/DRAIN to
relieve pressure.
Pressure Relief Procedure
3. Turn pressure to lowest setting. Hold metal part of
gun firmly to a grounded metal pail. Trigger gun to
relieve pressure.
4. Engage trigger lock.
DLeave Spray--Prime/Drain valve in PRIME/DRAIN
position until you are ready to spray again.
DIf you suspect the spray tip is clogged or that pressure
has not been fully relieved after following the above
steps, VERY SLOWLY loosen tip guard retaining nut
or hose end coupling to relieve pressure gradually.
Then loosen completely. Clear hose or tip obstruc-
tion.
Follow Pressure Relief Procedure when you
stop spraying and before cleaning, checking, servicing or transporting
equipment.
PRIME
PRIME
ti6762a
ti6763a

9309423
General Repair Information
WARNING
Flammable materials spilled on hot,
bare, motor could cause fire or
explosion. To reduce risk of burns, fire or
explosion, do not operate sprayer with
cover removed.
DKeep all screws, nuts, washers, gaskets, and
electrical fittings removed during repair procedures.
These parts usually are not provided with replace-
ment kits.
DTest repairs after problems are corrected.
DIf sprayer does not operate properly, review repair
procedure to verify you did it correctly. See Trouble-
shooting, page 10.
DOverspray may build up in the air passages. Re-
move any overspray and residue from air passages
and openings in the enclosures whenever you
service sprayer.
DDo not operate the sprayer without the motor
shroud in place. replace if damaged. Motor shroud
directs cooling air around motor to prevent over-
heating and insulate the control board from acci-
dental electric shock.
WARNING
To reduce risk of serious injury, including
electric shock:
DDo not touch moving or electric parts
with fingers or tools while testing repair
DUnplug sprayer when power is not
required for testing
DInstall all covers, gaskets, screws and
washers before you operate sprayer
CAUTION
DDo not run sprayer dry for more than 30 seconds.
Doing so could damage pump packings.
DProtect the internal drive parts of this sprayer
from water. openings in the cover allow for air
cooling of the mechanical parts and electronics
inside. If water gets in these openings, sprayer
could malfunction or be permanently damaged.
DPrevent pump corrosion and damage from freez-
ing. Never leave water or water--base paint in
sprayer when it is not in use in cold weather.
Freezing fluids can seriously damage sprayer.
Store sprayer with Pump armour to protect spray-
er during storage.
DDo not operate the sprayer without the motor
shroud or control box cover in place. Replace if
damaged. Motor shroud directs cooling air around
motor to prevent overheating and the control box
cover insulates the control board from accidental
electric shock.

10 309423
Troubleshooting
Before performing any repairs, relieve pressure, page 8.
MOTOR WON’T OPERATE
TYPE OF PROBLEM WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Basic Fluid Pressure
Problems
1. Pressure control knob setting. Motor will not run
if at minimum setting (fully counterclockwise).
1. Slowly increase pressure setting to see if mo-
tor starts.
2. Spray tip or fluid filter may be clogged. 2. Relieve pressure and clear clog or clean fil-
ter; refer to separate gun or tip instruction
manual.
Basic Mechanical
Problems
1. Pump (13) frozen or hardened paint. 1. Thaw sprayer if water or water-based paint
has frozen in sprayer. Place sprayer in warm
area to thaw. Do not start sprayer until
thawed completely. If paint hardened (dried)
in sprayer, replace pump packings. See
page 26 (Displacement Pump Replace-
ment).
2. Displacement pump connecting rod pin (9a).
Pin must be completely pushed into connecting
rod (9) and retaining spring (9b) must be firmly
in groove of pump pin. See Fig. 11.
2. Push pin into place and secure with spring re-
tainer.
3. Motor (1). Remove drive housing assembly
(10). See page 24. Try to rotate fan by hand.
3. Replace motor (1) if fan won’t turn. See page
25.

11309423
Basic Electrical Problems
See Wiring Diagram, page
1. Motor control board. Board shuts down and dis-
plays error code on some models.
1. See Motor Control Board Diagnostics,
page 19.
g
g
,
p
g
17. 2. Electrical supply. Meter must read 100--130
VAC for 110--120 VAC models and 210--255
VAC for 240 VAC models.
2. Reset building circuit breaker; replace build-
ing fuses. Try another outlet.
3. Extension cord. Check extension cord continu-
ity with volt meter.
3. Replace extension cord.
4. Sprayer power supply cord. Inspect for damage
such as broken insulation or wires.
4. Replace power supply cord.
5. Fuse. Check replaceable fuse on control board. 5. Replace fuse after motor inspection.
6. Motor leads are securely fastened and properly
connected to control board.
6. Replace loose terminals; crimp to leads. Be
sure terminals are firmly connected.
Clean circuit board terminals. Securely re-
connect leads.
7. Motor thermal switch. Yellow motor leads must
have continuity through thermal switch.
7. Replace motor. See page 25, Motor Re-
placement.
8. Brush cap missing or loose brush lead connec-
tions.
8. Install brush cap or replace brushes if leads
are damaged. See page 14, Motor Brush Re-
placement.
9. Brush length which must be 1/4 in. (6 mm) mini-
mum.
NOTE: Brushes do not wear at the same rate on
both sides of motor. Check both brushes.
9. Replace brushes. See page 14, Motor Brush
Replacement.
10.Motor armature commutator for burn spots,
gouges and extreme roughness.
10. Remove motor and have motor shop resur-
face commutator if possible. See page 25,
Motor Replacement.
11. Motor armature for shorts using armature tester
(growler) or perform spin test, page 14.
11. Replace motor. See page 25, Motor Re-
placement.
12.Pressure controlnot plugged into controlboard. 12.Insert pressure control connector into control
board.

12 309423
Troubleshooting
LOW OR FLUCTUATING OUTPUT
TYPE OF PROBLEM WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Low Output 1. For worn spray tip. 1. Follow Pressure Relief Procedure Warn-
ing, then replace tip. See your separate
gun or tip manual.
2. Verify pump does not continue to stroke when
gun trigger is released.
2. Service pump. See page 26.
3. Filter clogged (If optional filter is installed). 3. Relieve pressure. Check and clean filter.
4. Prime valve leaking. 4. Relieve pressure. Repair prime valve.
5. Suction hose connections. 5. Tighten any loose connections.
6. Electrical supply with volt meter.
Meter must read:
210--255 Vac for 220--240 Vac models.
85--130 Vac for 100--120 Vac models. Low volt-
ages reduce sprayer performance.
6. Reset building circuit breaker; replace
building fuse. Repair electrical outlet or try
another outlet.
7. Extension cord size and length; must be at least
12 gauge wire and no longer than 300 ft. Longer
cord lengths reduce sprayer performance.
7. Replace with a correct, grounded exten-
sion cord.
8. Leads from motor to pressure control circuit
board (35) for damaged or loose wires or con-
nectors. Inspect wiring insulation and terminals
for signs of overheating.
8. Be sure male terminal blades are centered
and firmly connected to female terminals.
Replace any loose terminal or damaged
wiring. Securely reconnect terminals.
9. For loose motor brush leads and terminals. See
page 14.
9. Tighten terminal screws. Replace brushes
if leads are damaged. See page 14.
10.For worn motor brushes which must be 1/4 in. (6
mm) minimum. See page 14.
10. Replace brushes. See page 14.
11. For broken or missing motor brush caps. 11. Replace brushcap if broken. Realign spring
with brush. See page 14.
12.Motor brushes for binding in brush holders. See
page 14.
12.Clean brush holders, remove carbon dust
with small cleaning brush. Align brush lead
with slot in brush holder to assure free verti-
cal brush movement.
13.Low stall pressure. 13. Do either or both:
a. Turn pressure control knob fully
clockwise. Make sure pressure
control knob is properly installed to
allow full clockwise position.
b. Try a new transducer.
14.Motor armature for shorts by using an armature
tester (growler) or perform spin test. See page
14.
14.Replace motor. See page 25.

13309423
Troubleshooting
LOW OR FLUCTUATING OUTPUT
TYPE OF PROBLEM WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Motor runs and pump strokes 1. Paint supply. 1. Refill and reprime pump.
2. Intake strainer clogged. 2. Remove and clean, then reinstall.
3. Suction tube or fittings loose. 3. Tighten; use thread sealant or sealing tape
on threads if necessary.
4. To see if intake valve ball and piston ball are
seating properly. See page 26.
4. Remove intake valve and clean. Check
balls and seats for nicks; replace if neces-
sary, page 26. Strain paint before using to
remove particles that could clog pump.
5. Leaking around throat packing nut which may
indicate worn or damaged packings. See
page 26.
5. Replace packings, page 26. Also check
piston valve seat for hardened paint or
nicks and replace if necessary. Tighten
packing nut/wet-cup.
6. Pump rod damage. 6. Repair pump, page 26.
7. Capacitor failure. Visually inspect capacitor
near terminals. Ensure that orange safety re-
lief plug is intact.
7. Replace capacitor.
Motor runs but pump does not
stroke
1. Displacement pump pin (9a) (damaged or
missing), page 26.
1. Replace pump pin if missing. Be sure re-
tainer spring (9b) is fully in groove all
around connecting rod, page 26.
2. Connecting rod assembly (9) for damage,
page 24.
2. Replace connecting rod assembly,
page 24.
3. Gears or drive housing, page 24. 3. Inspect drive housing assembly and gears
for damage and replace if necessary,
page 24.
Motor is hot and runs intermit-
tently
1. Be sure ambient temperature where sprayer
is located is not more than 115 _F(46_C) and
sprayer is not located in direct sun.
1. Move sprayer to shaded, cooler area if pos-
sible.
2. Motor has burned windings indicated by re-
moving positive (red) brush and seeing
burned adjacent commutator bars.
2. Replace motor. See page 25, Motor Re-
placement.
3. Tightness of pump packing nut. Overtighten-
ing tightens packings on rod, restricts pump
action and damages packings.
3. Loosen packing nut. Check for leaking
around throat. Replace pump packings if
necessary. See pump manual 309428.

14 309423
Spin Test
Setup
To check armature, motor winding and brush electrical
continuity:
1. Relieve pressure; page 8.
2. Remove drive housing; page 24.
3. Fig. 2. Remove pressure control cover (39). Dis-
connect red and black motor leads from control
board.
4. Fig. 3. Remove motor shroud (74).
Armature Short Circuit Test
Quickly turn motor fan by hand. If no electrical shorts,
motor coasts two or three revolutions before complete
stop. If motor does not spin freely, armature is
shorted. Replace motor; page 25.
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
1. Connect red and black motor leads together with
test lead. Turn motor fan by hand at about two
revolutions per second.
2. If uneven or no resistance, check for: broken brush
springs, brush leads, motor leads; loose brush
terminal screws, motor lead terminals; worn
brushes. Repair as needed; page 14.
3. If still uneven or no resistance, replace motor;
page 25.
9578A
Fig. 2
F
G
39
Motor Brush Replacement
Motor Brush Removal
Replace brushes worn to less than 1/4 in. (6 mm).
Check both sides. See Parts List pages 27 -- 40 for
correct brush kit for your series of sprayer.
1. Read General Repair Information; page 10.
2. Relieve pressure; page 8.
3. Fig. 3. Remove four screws (18) and motor
shroud (74).
4. Pry off two brush caps (A). Tag locations of red (+)
and black (--) motor leads. Cut tie wrap.
5. Fig. 5. Remove screw (C) and discard brush (B)
for motor with capacitor attached. Remove brush
leads from control box for motor without capacitor
attached.
TI0053
A
74
Fig. 3
18

15309423
Motor Brush Replacement
6. Fig. 4. Insert brush (B). Push cap (A) into place
over brush. Orient each cap with the 2 projections
on either side of the brush lead. You will hear a
“snap” when cap is securely in place.
CAUTION
When installing brushes, follow all steps carefully to
avoid damaging parts.
7. Fig. 4. Install red (+) and black (--) motor leads
according to tags. Install brush lead end with
screw (C) to motor-mounted capacitor or route
lead into control box and connect to board.
C
E
Fig. 4
A
TI0053
B
C
ti7479a
To Mot or ( D )
8. If replacement brush harness has 2 yellow wires
(C), cut, strip, and crimp the 2 yellow wires (D)
from the motor and butt splice (E) on the replace-
ment harness.
9. Inspect commutator for excessive pitting, burning
or gouging. A black color on commutator is normal.
Have commutator resurfaced by a motor repair
shop if brushes wear too fast.
10. Test brushes.
a. Remove pump (13); Displacement Pump
Replacement, page 26.
b. With sprayer OFF, turn pressure control knob
fully counterclockwise to minimum pressure.
Plug in sprayer.
c. Turn sprayer ON. Slowly increase pressure
until motor is at full speed.
11. Break in brushes.
a. Operate sprayer 1 hour with no load.
b. Install pump (13); Displacement Pump Re-
placement, page 26.

16 309423
On/Off Switch Replacement
Removal
1. Relieve pressure; page 8.
2. Fig. 5. Remove four screws (18) and pressure
control cover (39).
3. Disconnect two wires (A) from ON/OFF
switch (23).
4. Remove toggle boot (25) and locking ring (24).
Remove ON/OFF switch (23).
Installation
1. Install new ON/OFF switch (23). Install locking ring
(24) and toggle boot (25).
2. Connect two wires (A) to ON/OFF switch.
3. Install pressure control cover (39) with four
screws (18).
Fig. 5
39
A
18
23 36
52
E
D
35
36
25
24
37
22
ti3917a

17309423
Wiring Diagram
120 Vac
Fig. 6
Pressure Transducer
ON/OFF
Switch
Power
Plug
Potentiometer
from Motor
Red (+)
Yellow
White
Black
Black (--)
Capacitor
TI0060
Green
60
35
34
Ref134
Ref133
(Capacitor on Motor) 1
1Used on 233782 A only
233782, A
233782, B, C, D, E
246649, A, B, C
Pressure
Transducer
ON/OFF
Switch
Power
Plug
Potentiometer
from Motor
Capacitor
Black
Green
White
Yellow
Black (--)
Red (+)
N
L
M+ M-- TO1 TO2
J7
J8
ti2159a
(Capacitor on PC Board)

18 309423
Wiring Diagram
Fig. 7
ti7415a
Motor
Connector
ON/OFF
Switch
Black
White
White
Pressure
Switch
Black
Black
Green
Power
Cord
233782: F
246649: D

19309423
Pressure Control Repair
Motor Control Board Diagnostics
For these Models and Series ONLY:
233782: A, B, C, D, E
246649: A, B, C
Note: Keep a new transducer on hand to use for test.
CAUTION
Do not allow sprayer to develop fluid pressure with-
out transducer installed. Leave drain valve open if
test transducer is used.
1. Remove four screws (18) and cover (39).
2. Turn ON/OFF switch ON.
3. Observe LED operation and reference following
table:
4. Relieve pressure and unplug sprayer before
servicing control board;page 8.
LED
BLINKS
SPRAYER OPERATION INDICATES WHAT TO DO
Once Sprayer runs Normal operation Do nothing
Once and
stays ON
Sprayer shuts down and LED stays ON Motor open circuit or bad
control board
Check motor brushes and
armature. If OK, replace mo-
tor control board.
Two times
repeatedly
Sprayer shuts down and LED continues
to blink two times repeatedly
Run away pressure. Pres-
sure greater than 4500 psi
(310 bar, 31 MPa).
Replace motor control board.
See following Motor Control
Board procedure.
Three times
repeatedly
Sprayer shuts down and LED continues
to blink three times repeatedly
Pressure transducer is
faulty or missing
Check transducer connection.
Open drain valve. Substitute
new transducer for transducer
in sprayer. If sprayer runs,
replace transducer.
Four times
repeatedly
Sprayer shuts down and LED continues
to blink four times repeatedly
Line voltage is too high Check for voltage supply
problems
Five times
repeatedly
Sprayer shuts down and LED continues
to blink five times repeatedly
Too much current Check for locked rotor,
shorted wiring or motor. Re-
pair or replace failed parts.
Six times
repeatedly
Sprayer shuts down and LED continues
to blink six times repeatedly
Motor thermal switch
open circuit
Check for binding in pump or
drive. Check for bad motor.

20 309423
Pressure Control Repair
Motor Control Board
For these Models and Series ONLY:
233782: A, B, C, D, E
246649: A, B, C
Removal
Refer to Fig. 5 and 6.
1. Relieve pressure; page 8.
2. Remove four screws (18) and cover (39).
3. Disconnect at motor control board (35):
DFour motor leads: two yellow, black (--)
and red (+).
DTwo line voltage leads.
DLead (D) from potentiometer.
DLead (E) from transducer.
4. Remove five screws (36) and circuit board (35).
Installation
1. Clean pad on rear of motor control board. Apply
small amount of thermal compound 073019 to pad.
2. Fig. 5. Install motor control board (35) with five
screws (36).
3. Connect to motor control board (35):
DLead (E) to transducer.
DLead (D) to potentiometer.
DTwo line voltage leads.
DFour motor leads: two yellow, black (--)
and red (+).
4. Install cover (39) with four screws (18).
DLead (D) to potentiometer.
DTwo line voltage leads.
DFour motor leads: two yellow, black (--)
and red (+).
5. Install cover (39) with four screws (18).