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Troubleshooting
WARNING
INJECTION HAZARD
To reduce the risk of serious injury, when
instructed to relieve pressure, follow the
Pressure Relief Procedure on page 8.
CAUTION
Thaw sprayer if water or water-based paint has
frozen in it, due to exposure to low temperatures, by
placing it in a warm area. Do not try to start sprayer
until it has thawed completely or damage to motor
and/or control board may occur. If paint hardened
(dried) in sprayer, the pump packings and/or pres-
sure transducer must be replaced. See page 22
(pump) or 28 (pressure transducer).
Check everything in the troubleshooting tables before disassembling the sprayer.
Basic Problem Solving
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
Fluid Pressure 1. Check pressure transducer knob setting. The
pump won’t develop much pressure if it is at mini-
mum setting (fully counterclockwise).
1. Slowly increase pressure setting to see if
motor starts.
2. Check for a clogged spray tip or fluid filter, if used.
See page 8.
2. If tip is still clogged, relieve pressure;
refer to separate gun or tip instruction
manual for tip cleaning. Clean or replace
filter element. See manual 308249.
Mechanical 1. Check for frozen or hardened paint in pump (18).
Using a screwdriver, carefully try to rotate fan at
back of motor by hand. See page 23.
1. Thaw. After thawing, plug in sprayer and
turn it on. Slowly increase pressure set-
ting to see if motor starts. If it doesn’t
start, see CAUTION above.
2. Check pump connecting rod pin (14). It must be
completely pushed into connecting rod (12), and
retaining spring (15) must be firmly in connecting
rod groove. See Fig. 18, page 22.
2. Push pin into place and secure with
spring retainer.
3. Check for motor damage. Remove drive housing
assembly (2). See page 26. Try to rotate motor
fan by hand.
3. Replace motor (85) if fan won’t turn. See
page 23.
Electrical 1. Check electrical supply with volt meter. Meter
should read 105–125 VAC.
1. Reset building circuit breaker; replace
building fuse. Try another outlet.
2. Check extension cord for visible damage. Use a
voltmeter or test lamp at extension cord outlet to
check.
2. Replace extension cord.
3. Check sprayer power supply cord (30) for visible
damage such as broken insulation or wires.
3. Replace power supply cord. See page
25.