Flow Meter - Bunn Fast Cup Series Service & Repair Manual

LEFT PANEL LEFT PANEL

Flow Meter

Purpose: The volumetric meter uses a turbine with
magnets. The water passes by the turbine causing
the turbine to rotate while the hall affect sensor in-
puts the pulse signals for every amount of milliliters
passing through.
TEST INSTRUCTION
Enter Service Technician Mode and Select
Service icon
Step 1: Select and enter the Water System tab.
Step 2: Touch Hot Water Bypass Valve to see rise
in flow counts. The increase in flow count
number informs technician that the turbine
is rotating from water flow exiting out the
dispense nozzle and produces signal inputs
to the main control board.
No Signal Inputs: Check wiring harness
between flow meter and I/O board for loose
connection, check flow meter for supply
voltage before replacing flow meter.
Volt/Ohm Meter - Voltage Check
Step 3: Disconnect or unplug machine from power.
Step 4: Remove right panel to access circuit
boards.
Step 5: Locate J13 connector on the Input/Output
board.
Step 6: Connect power to machine.
Step 7: Set voltmeter on D/C voltage. Install red
meter lead on terminal J13-7 WHT/RED
wire (positive) and black meter lead on
J13-5 WHT/BLK wire (negative) terminal.
Step 9: The reading should be 5.0VDC.
PART RELATES TO THE FOLLOWING SYMPTOMS
• Active Notice - E-045: Low Water Flow-Blockage
SERVICE SERVICE
1
60
2
196
2
5