Circuit Board Replacement - Graco ULTRA AIRLESS 230-963 Instructions And Parts List

CIRCUIT BOARD REPLACEMENT

WARNING
Before doing this procedure, follow the Pressure
Relief Procedure Warning on page 17 to reduce
the risk of a fluid injection injury, splashing
eyes or on the skin, injury from moving parts, or
electric shock. Be sure to unolua rhe soraverl
1. Remove the pressure control cover and screws.
2. Turn the pressure control knob all the way counter-
clockwise to the minimum setting to release spring
tension on the board. Also check to be sure only
three or four threads of the pressure control knob
shaft are exposed below the pressure adjustment
(SI.
Back down the nut, if necessary. See Fig
nut
20.
Step 2 is essential to reduce the risk of damaging
I the circuit board while removing
3.
Disconnect ALL wires from the board, including the
two
heavy black wires. Pay close attention
connections are made. See Fig 21.
4. To remove the board from the box, pull out the
black plastic-tipped pin
-
the circuit board toward the wall of the box and
carefully slide the board out.
5. Install the board in the box at the Same angle as
was removed.
6. Reconnect all wires. Refer to the wiring diagram in
Fig 21.
Fig 21
22
307-671
20 8
(See Figs
in
the
or
c installing
it.
to where
.
(330).
Push the bottom of
it
TP8
21)
r C l R C U l T BOARD
P
Fig
Be sure the flat blade of the insulated male con-
nector is centered exactly in the wrap-around
blade of the female connector when connections
are made.
Route all wires carefully to avoid interference with
the circuit board, bourdon tube and pressure con-
trol cover.
These precautions are essential to reduce the risk
of malfunction.
7. Perform the STALL PRESSURE CALIBRATION
on page 24 if you installed a new board.
TP7
PLUQ
PRESSURE CONTROL KNOB
r
CAUTION
A