Door Fan - Bunn Fast Cup Series Service & Repair Manual

UPPER DOOR COVER
Upper Door Fan
Purpose: Fan is rated 24VDC and operates 24/7. The
fan circulates air inside the upper door and exits out
the door back plate.
TEST INSTRUCTION
Volt/Ohm Meter - Voltage Check

Door Fan

When the brewer is powered up, the fan should be
operating regardless if either door interrupt switch
is open. Raise upper door and visually look for fan
blade movement or feel for air flow outward or being
exhausted.
Step 1: Disconnect or unplug machine from power.
Step 2: Remove right panel to access circuit
boards.
Step 3: Locate J19 connector on the Input/Output
board. Connect machine to power.
Step 4: Set voltmeter on D/C voltage. Install red
meter lead on terminal J19-9 Red wire
(positive) and the black meter lead on J19-7
Black wire (negative) terminal.
Step 5: If the reading is 24.0VDC, check for loose
connection before replacing the door fan.
Voltage Output Not Present: Replace I/O
board.
PART RELATES TO THE FOLLOWING SYMPTOM
• Irregular or higher internal cabinet temperature
SERVICE
5
33
4
5
OPTIONAL