Bunn Fast Cup Series Service & Repair Manual page 48

LOWER FRONT PANEL
Piston Motor
Volt/Ohm Meter - Voltage Check
Step 1: Disconnect or unplug machine from power.
Step 2: Remove right panel to access circuit
boards.
Step 3: Locate J13 connector on the High Voltage
board.
Step 4: Connect power to machine.
Step 5: Set voltmeter on D/C voltage. Install red
meter lead on terminal J13-1 Violet wire
(positive) and black meter lead on J13-2
WHI/VIO wire (negative) terminal.
Step 6: The reading should be 48.0VDC with
both door switches turned On. The reading
will be 16.0VDC with one door switch
turned Off.
PART RELATES TO THE FOLLOWING SYMPTOMS
• Motor making unusual noise during operation
• Active Notice - E-098: Piston Error Comm Fail
• Active Notice - E-071: Brew Error Piston Move
Timeout
SERVICE
208VAC 2 WIRE + GND
SINGLE PHASE
56640.0000A 08/19 ©2019 BUNN-O-MATIC CORPORATION
OPTIONAL
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