Pressure Control Board
311365H 23
240 Vac Motor Control Board
Removal
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 six screws (27), two screws (102) and
control board.
Installation
1. Use Acetone or equivalent solvent to
thoroughly remove thermal paste from the
pockets of the Powerbar.
2. Apply thermal compound:
a. For 2 capacitor boards and 6 capacitor
boards with the Powerbar shown in Figure 1
below, apply a small amount of thermal
compound 15U114 or 110009 (5) to shaded
component areas on rear of motor control
board (52).
b. For 6 capacitor boards with the powerbar
shown in Fig. 2 below, apply a small
amount of thermal compound 15U114 or
110009 (5) into both pockets of the Power-
bar (69) and scrape across the pocket with
the provided scraper so an even layer is
remaining in the pocket
Relieve pressure; page 9. Wait 5 minutes before
servicing.
NOTICE
To reduce risk of motor control board failure, do
not overtighten screws (102) which can damage
the electric components.
5
52
ti17334a
Figure 1
5
69
Figure 2
ti14693a
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