Latch Assembly - Bunn Fast Cup Series Service & Repair Manual

LOWER FRONT PANEL

Latch Assembly

Purpose: The upper piston is attached to the latch
assembly. Inside the latch assembly is a mechanism
that protrudes a latch out each side of the assem-
bly. When the latch assembly moves downward,
the latches will get compressed inward by the side
brackets until the assembly reaches latch position.
The latching point is when the latches reach the slot-
ted opening in the side brackets and spring outward
into the opening, engaging the lower brew piston
assembly.
When a brew dispense is completed, the latch as-
sembly raises the lower piston in the brew chamber
to ready the semi-wet coffee grounds to be swiped
into the grounds bin and will continue raising the up-
per piston with latch assembly until the latch assem-
bly hits the upper latch release stud that will disen-
gage the latches from the side brackets. The two gas
springs assist in the return of the lower piston back
to bottom/start position.
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 Brew Piston Latch button.
Step 3: Listen for latch engagement, piston
location will read 109mm and piston status
will display the word Latched.
Step 4: Next, touch Brew Piston Home button.
Listen for the latch disengagement, lower
piston returning to bottom/start position.
Note: Normal hearing latch disengagement.
PART RELATES TO THE FOLLOWING SYMPTOMS
• Heightened latch disengagement sound, confirm
all legs are flat on the counter surface
• No latch engagement - Over maximum 45 gram
limit in brew chamber
• Active Notice - E-083: Piston Error Stall Down No
Latch
SERVICE
4
Latch
Slot
1
54
Brew Module Latch
Engagement View
Latch Assembly
Entry - Latch Release
4
2
3
3
Latch
Engaged