Control Board Replacement - Graco AIRLESSCO SP400 Hi Boy Repair Manual

Control Board Replacement

See Wiring Diagram, page 28.
Removal
1. Relieve pressure, page 7. Disconnect power cord
from outlet.
2. Hi-Boy Models Only - Disconnect high-pressure
hose at pump outlet (see page 13).
3. Remove two screws (4) and shroud (12) (see illus-
tration, page 17).
4. Disconnect pressure control assembly connector
(A) from control board (18).
18
5. Disconnect motor connector (D) from control board
(18).
6. Remove three screws (11) securing control board to
housing (two are located on the front and one on the
back next to the power cord).
3A1181B
D
A
120V
C
ti16079a
11
7. Pull control board out slightly and then slide control
board back and off of frame.
NOTE: Make sure power cord is free and not wrapped
around cord wrap.
8. Remove grommet and wires from strain relief.
NOTE: Ground wire remains attached to sprayer with
grounding screw.
18
9. Remove two power cord (C) connectors from control
board.
18
ti11554a
Control Board Replacement
Grommet
120V
C
Strain
Relief
ti6122a
D
A
ti16079a
19