Valve Control Board Information And Service; Valve Control Board Diagnostics - Cornelius pbd175 Service Manual

V C
ALVE ONTROL
The Valve Control board uses a USB communication cable from the computer to cycle the beverage valves and
control the down lights. The board is supplied by a 30/12 VDC connector from the power supply and is capable of
supplying power to 28 valves {when PBD175 (Spire 3.0) is completely featured}.

Valve Control Board Diagnostics

To diagnose Valve Control board malfunctions, perform the procedure below.
1. With the dispenser running, open the door.
2. Remove the E-box cover by removing the two
mounting screws and sliding the panel down to
disengage the tabs on the top of the panel.
3. Visually inspect the Valve Control board for any
signs of loose connections.
4. Verify that the red LED on the board is illuminated.
5. If power is present and the red LED is not illuminated, replace the board.
6. Visually check the communications LEDs located above the USB input to the board. There are two LEDs
that flash in sequence. Both LEDs should be flashing at 1 second intervals
7. If the LEDs are not flashing, check the USB cable at the computer and relay board ends. If signs of water
encroachment are visible at the USB port clean the USB connectors and or replace both the cable and
the board.

If only one LED is flashing, the lights are sporadic or not flashing, clean the USB connectors or replace
both the cable and board.

If any burning or discoloration appears on the board, replace it.
8. If all of the valves are properly mapped and more than one valve is operating sporadically, replace the
Valve Control board, as described in "Replacing the Valve Control Board" on page 32.
© 2015-2016, Cornelius Inc.
B I
OARD NFORMATION AND
PBD175 (Spire 3.0) Service Manual
S
ERVICE
PWR
- 31 -
Mounting
Screws
Figure 50.
Red
LED
Figure 51.
Publication Number: 620062609SER