240 Vac Motor Control Board - Graco 311365G Repair Manual

Removal
Relieve pressure; page 9. Wait 5 minutes before
servicing.
1. Remove all four screws (38) and cover (96).
2. Disconnect display connector (A) from motor
control board (52).
3. Remove bottom two screws (39). disconnect
potentiometer connector (C) from motor control
board (52). Disconnect power cord connectors
(D) and filter board connectors (J) from
ON/OFF switch (33) and remove control panel
(68).
4. Disconnect WatchDog switch connector (X)
from motor control board.
5. Disconnect motor control board power
connectors (K) from filter board (146).
6. Remove top two screws (39) and control box
(61).
7. Disconnect transducer connector (E) from
motor control board.
8. Disconnect motor connectors (F, G and H) from
motor control board.
9. Remove motor shroud disconnect and remove
wiring from baffle.
10. Remove five screws (27), three screws (102)
and motor control board.
11. Remove six screws (27), two screws (102) and
control board.
22

240 Vac Motor Control Board

Installation
1. Apply a small amount of thermal compound
15U114 or 110009 (5) to shaded areas on rear
of motor control board (52).
CAUTION
To reduce risk of motor control board failure, do not
overtighten screws (102) which can damage the elec-
tric components.
2. Install six screws (27), two screws (102) and
control board.
3. Install motor control board (52) with five screws
(27). torque to 9-11 in-lb (1.02 - 1.24 N•m).
Install and torque three screws (102) to values
in illustration on page 23.
4. Connect motor connectors (F, G and H) to
motor control board.
5. Reconnect wiring and install onto baffle. Install
motor shroud.
6. Connect transducer connector (E) to motor
control board.
7. Connect motor control board power connectors
(K) to filter board (146).
8. Install control box (61) with top two screws (39).
9. Connect filter board power connectors (J) and
power cord connectors (D) to ON/OFF switch
(33).
10. Connect potentiometer connector (C) to motor
control board.
11. Connect WatchDog switch (X) to motor control
board.
12. Install control panel (68) with two screws (39).
13. Connect display connector (A) to motor control
board (52).
14. Install cover (96) with four screws (38).
Pressure Control Board
311365G