Bunn Fast Cup Series Service & Repair Manual page 89

REAR PANEL
Step 11: Next, check water pump control/signal
(PWM) at J13 connector on the Input/Out
board.
Step 12: Set voltmeter on D/C voltage. Install red
meter lead on terminal J13-10 (+) GRN
wire terminal and black meter lead on
J13-11 (-) BLK wire terminal.
Enter Service Technician Mode and Select
Service icon
Step 13: Select and enter the Water System tab.
Step 14: Touch the Water Pump button to activate the
water pump. The voltage reading will range
between 0.00 to 24.0VDC indirectly related
to the Water Pump Rate (ml/sec) slider bar
setting.
Water Pump Rate - Slider Bar
Ml/Sec
30
40
50
60
Step 15: Voltage present and no water pressure or
water pump speed increase - Replace water pump.
PART RELATES TO THE FOLLOWING SYMPTOMS
• Brew starts and then aborts/cancels
• Active Notice - E-046: Water Pump Stalled
SERVICE
D/C Voltage
10.2
14.6
21.0
24.0
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15
14
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