Bit Testing; Manufacturing Built In Test (Bit) - Keurig B3000 Service Manual

VII BIT Testing

Manufacturing Built In Test (BIT)

The B3000 brewer has the ability of performing diagnostic tests to verify if most of the critical system
elements are functioning properly. For brewers from 1 – 7505 see page 85. For brewers 7506 and above
see page 89.
To initiate the B3000 BIT, follow the procedure below:
•
Start with an empty, cold brewer
•
While powered off; Press and hold the Menu Button
•
Turn power on (Hard Power)
•
Release the Menu Button
•
Press the Center Left Button 4 times within 2 seconds of applying power
Notes:
•
The top line of the display shows:
o The test number
o The tested component / instructions
•
The second line of the display shows:
o The most likely module bad, if fail.
For example
01: LEFT SW & LED
MODULE: CTRL-PCB
•
If any test fails the criteria, BIT will halt at that failed test number
•
Ensure that the Entrance Needle is blocked before the start of the test with a pressure
gauge. If not, BIT cannot advance beyond Test No. 22.
•
These test fixtures are required:
Plug in coin IF loop back plug. (Figure 1) (Use P/N 03-200922-000 for ordering)
Ampere meter for power. (optional, can ignore current draw check)
Entrance needle blocker with pressure gauge. (optional, can use a piece of plugged tubing)
Coin interface loop-back plug (short transmit to receive) (optional, can stop at this test)
Vent clamp (optional, can use finger to block tube opening)
Inlet valve plug (optional, can use normal water hook-up)
•
Note that after a few passes of the BIT, the brewer will be too warm to pass the
temperature sanity check.
BIT loops on the last test forever. Power down to continue.
Figure 1.
Modified RJ11 cable for coin unit test
B3000 SERVICE MANUAL
60-200807-000, REV C 85