Advanced Troubleshooting
332695C 21
Basic electrical problems. Motor overheated. Allow motor to cool for 45 minutes. Retry.
Electrical outlet is damaged. Reset building circuit breaker or replace fuse. Try
another outlet.
Check electric supply with volt meter. Meter must
read 220/240 VAC. If voltage is too high, do not
plug sprayer in until outlet is corrected.
Control board leads are
improperly fastened,
improperly mated, or
corroded.
Replace any loose terminals. Make sure all leads
and harnesses are firmly connected.
ProLTS 19: Check pressure control harness
connection on front side of drive housing.
Clean control board terminals. Securely reconnect
leads.
Motor brushes are worn. Check length of BOTH brushes (brushes do not
wear evenly on both sides of the motor). Brush
length must be 0.25 in. (6.4mm). If brushes are
worn replace motor using Motor Kit. See List of
Kits, page 30.
Motor armature commutator
damaged.
Check for burn spots, gouges and extreme
roughness. If damaged or if shorts are evident,
replace motor using Motor Kit. See List of Kits,
page 30.
Fuse is blown. Find cause for blown fuse before replacing. Turn
the motor fan to check for a locked gear or pump.
Use a continuity meter to check for a short to
ground caused by a pinched wire.
ProLTS 19: Replace the fuse with correct fuse kit.
See List of Kits, page 30.
LTS 15 and LTS 17: The fuse is not replaceable.
Replace control board. See List of Kits, page 30.
Motor armature shorting. Check for shorts. See Motor Diagnostics, page
27. If shorts are evident, use Motor Kit to replace
motor. See List of Kits, page 30.
Motor armature open circuit. Check motor leads for continuity. If open circuit,
check brushes. Use Motor Kit to replace motor.
See List of Kits, page 30.
Control board damaged.
CAUTION: Do not perform
control board diagnostics until
you have determined the
armature is good. A damaged
armature can burn out a good
control board.
See Control Board Diagnostics, page 29.
Replace control board if damaged using Control
Board Kit. See List of Kits, 30.
Specific Problem Cause Solution
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