Bunn Fast Cup Series Service & Repair Manual page 51

LOWER FRONT PANEL
Swiper Switch
Purpose: A normally open switch that will close
when a magnetic field is applied. The magnet is
mounted and sealed in the underside of the swiper
assembly. The swiper switch is used to validate
swiper position throughout machine operations.
TEST INSTRUCTION
Enter Service Technician Mode and Select
Service icon
Step 1: Select and enter the Brew Module tab. The
Brew Piston test buttons will move the
piston to a designated mm position point
when touched.
Step 2: Touch Swiper Removal button to move
piston from At Home to Not Home posi-
tion (8mm). The position is displayed in the
lower right corner of the test screen.
Step 3: If Not Home position is not achieved, re-
move swiper assembly and verify magnet is
in position and the area is clean of coffee
residue before continuing with switch voltage
test.
Volt/Ohm Meter - Voltage Check
Step 4: Disconnect or unplug machine from power.
Step 5: Remove right panel to access circuit
boards.
Step 6: Locate J16 connector on the Input/Output
board.
Step 7: Connect power to machine.
Step 8: Set voltmeter on D/C voltage. Install red
meter lead on terminal J16-7 WHT wire
(positive) and black meter lead on J16-16
WHT/GRAY wire (negative) terminal.
Step 9: The reading should be 3.0VDC when swiper
is At Home position and go to 00.0VDC
when Swiper is Not Home position (swiper
extended forward).
If the voltage never drops out when the
swiper is in Not Home position, replace the
swiper sensor.
PART RELATES TO THE FOLLOWING SYMPTOMS
• Active Notice - E-042: Swiper Not Detected,
E-044: Swiper Did Not Return, E-075: Brew Error
No Swipe return
SERVICE
Swiper Status
Swiper Extended in Forward Removal Position
(8mm): Not Home
Swiper Retracted Position: At Home
1
OPTIONAL
51
Swiper Switch
2
2
8
Swiper
3
Magnet
2
9