Servicing The Control Box - Graco ProMix PD2K Repair Parts

Servicing the Control Box

Replacing the Isolation Board
NOTICE
To avoid damaging the circuit boards when
servicing the control box, wear Part No. 112190
grounding strap on your wrist and ground
appropriately.
To avoid electrical component damage, remove all
system power before plugging any connectors.
1. Follow the steps in
2. Loosen the screws (124) and remove the
enclosure cover (117).
3. Note the position of the isolation
board cables. See the following table,
Electrical Schematics, page
Disconnect the cables from the isolation board
(111). Remove the brackets (110).
Isolation Board
Connector
J1 (non-intrinsically
safe)
J2 (non-intrinsically
safe)
J3 (intrinsically safe)
J4 (intrinsically safe)
To reduce the risk of fire or explosion, be
certain that the barrier board is connected to
J3, on the IS side of the isolation board. If
connected incorrectly, the intrinsic safety of
your system is compromised.
4. Remove the screws (128) holding the isolation
board (111) to the barrier cover (107). Remove
the isolation board.
5. Install the new isolation board, using the screws
(128).
6. Install the brackets (110). Reconnect the cables
to the isolation board (111).
7. Turn on power at the main circuit breaker.
332709D
Before Servicing, page
34, and Figure 24.
Cable Destination
Gateway Module
Optional Non-IS Color
Change Module
Barrier Board
Optional IS Color
Change Module
8. Turn on the control box power switch. Check
that the two green LEDs (D7, D8) and two yellow
LEDs (D6, D14) are on. See Figure 24.
9. Reinstall the cover (117) and tighten the screws
(124).
48.
Figure 30 Replacing the Isolation Board
Figure 31 Detail of Isolation Board Cable
Connections
Repair
51