Bunn Fast Cup Series Service & Repair Manual page 72

LEFT PANEL
Qty-7 - Solenoid Valves, 2 Way Normally
Closed
Purpose: The coil energizes creating a magnetic
field to work against a spring force pivot mounted
lever that has a paddle style seal attached to the pivot
mount which will move away from outlet seat dur-
ing coil activation and will return paddle back to seat
position by spring force when coil is de-energized to
stop flow through valve.
Normally Closed Solenoid Valves
1) Inlet Valve
10) Ambient Water Bypass Valve
11) Brew Tank Drain Valve (Rear)
16) Hot Water Bypass Valve (Front)
17) Brew Chamber Coffee Dispense Valve
18) Brew Chamber Fill Valve* (Front, See Step 2)
19) Brew Chamber Cleaning Valve (Rear)
TEST INSTRUCTION
Enter Service Technician Mode and Select
Service icon
Step 1: Select and enter the Water System tab.
Step 2: Touch any of the normally closed valve
buttons to activate the solenoid valve.
*Brew Chamber Fill Valve button simul-
taneously activate Brew Chamber Coffee
Dispense Valve.
Step 3: Monitor the center plunger for movement
and/or click sound.
Yes - Electrically the solenoid valve is work-
ing but water or product may not be flow-
ing through valve because of an internal
blockage. Valve will need to be taken apart,
cleaned and rebuilt.
No click sound or movement - Go to Volt-
age Check before replacing solenoid valve.
Volt/Ohm Meter - Voltage Check
Step 4: Disconnect or unplug machine from power.
Step 5: Remove left & right panel to access water
system and circuit boards.
SERVICE
1
72
17
10
19
16
11
18
1
2
2
Continued >
2
2
2
2