Bunn TU3QF-EZ Guía Del Usuario

Page 25

FIG. 20 CONTROL BOARD

P2159.40

Location:

The control board is located inside the hood on

the right front behind the start switch.

Test Procedure:

The test procedures for the control board will vary

depending  upon  the  problems  experienced  by  the
brewer. Refer to the Troubleshooting guide beginning
on page 8. The troubleshooting guide is divided into
three sections, Refill Circuit, Heating Circuit, and Brew-
ing Circuit.

Removal and Replacement:
1. Disconnect the black wire (RL2) to the cord set.
2. Disconnect the blue wire (RL1) to the limit ther-

mostat.

3. Disconnect the 8-pin connector (J-1) and the 6-

pin connector (J-5) from the main wiring harness.

FIG. 21 BOARD WIRING

P2151.50

4. Disconnect  the  2-pin  connector  (J-7)  from  the

ready indicator LED.

5. Remove the four #6-32 screws securing the con-

trol board to the component mounting bracket.

6. Remove  the  four  spacers  from  the  old  control

board and attach them to the new control board.

7. Install a new control board and secure with the

four  #6-32  screws  to  the  component  mounting
bracket.

8. Connect the 2-pin connector from the ready indi-

cator LED.

9. Connect the 8-pin connector and the 6-pin con-

nector from the main wiring harness.

10. Connect the blue wire (RL1) from the limit ther-

mostat  and  the  black  wire  (RL2)  from  the  cord
set.

11. Refer to 

Adjustments and Optional Settings (Page

7) to program the new control board.

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