Graco ULTRA MAX 695 Instructions-Parts List Manual page 8

TYPE OF WHAT TO CHECK
PROBLEM
If check is OK, go to next check
Spray pattern 3. Pressure adjustment potentiometer (77) by replacing
variations with a new one.
(continued) (continued)
4. Low Output section, page 6.
Motor is hot and 1. Determine if sprayer was operated at high pressure with
runs intermit- small tips, which causes excessive heat build up.
tently
2. Be sure ambient temperature where sprayer is located is
no more than 90
direct sun.
3. Motor.
Building circuit 1. All electrical wiring for damaged insulation,
and all terminals for loose fit or damage.
breaker opens
Also check wires between pressure transducer
as soon as
and motor. See page 12.
sprayer switch is y
turned on.
2. For missing motor brush inspection plate gasket (see
page 10), bent terminal forks or other metal to metal
contact points which could cause a short.
3. Motor armature for shorts. Use an
armature tester (growler) or perform motor test.
See page 9. Inspect windings for burns.
4. Motor control board (22a) by performing motor control
board diagnostics on page 13. If diagnostics indicate,
substitute with a good board.
CAUTION: Do not perform this check until motor arma-
ture is determined to be good. A bad motor armature
can burn out a good board
Circuit breaker 1. Basic Problems – Electrical' on page 4.
opens after
sprayer oper-
ates for 5 to 10
minutes.
Building circuit 1. ON/OFF switch (80). Be sure sprayer is unplugged!
Disconnect wires from switch. Check switch with
breaker opens
ohmmeter. The reading should be infinity with ON/OFF
as soon as
switch OFF, and zero with switch ON.
sprayer is
plugged into
CAUTION: A short in motor circuit can damage switch
outlet and
and or motor control board (22a).
sprayer is not
turned on.
2. For damaged or pinched wires in junction box (20).
Unit will not run 1. Generator "peak" voltage.
Sprayer will not run if peak voltage is above 165 or be-
on generator but
low 75 VAC for 232916, 232917; above 190V or below
does run on AC
power 100V for 232910 – 232913, 232919 or above 260V or
below 180V for 232918, 232915, 232914.
8 309067
Intermediate Problem Solving
_ _
F (32 C) and sprayer is not located in
WHAT TO DO
When check is not OK, refer to this column
3. Replace potentiometer. See page 14..
1. Decrease pressure setting or increase tip
size.
2. Move sprayer to shaded, cooler area if
possible.
3. Replace motor. See page 12.
1. Repair or replace any damaged wiring or
terminals. Securely reconnect all wires.
2. Correct faulty conditions.
3. Replace motor. See page 12.
4. Replace board. See page 13.
1. Replace ON/OFF switch. See page 14.
2. Replace damaged parts.
1. Use AC power or a different generator.