Bunn Fast Cup Series Service & Repair Manual page 70

LEFT PANEL LEFT PANEL
Chiller Ambient Drain Solenoid Valve, 2 Way
Purpose: The chiller ambient drain valve opens to
allow the isolated heat exchanger water from the
"ice coffee" brew process to be discharged down
the drain. The continual ambient flow into the heat
exchanger, discharge through chiller ambient drain
valve and into the drip tray, efficiently cools the cof-
fee beverage before entering the coffee cup.
Solenoid Valve, 2 Way - Normally Closed
24) Chiller Ambient Drain Solenoid Valve
TEST INSTRUCTION
Enter Service Technician Mode and Select
Service icon
Step 1: Select and enter the Water System tab.
Step 2: Touch Chiller Ambient Drain Valve button to
activate the solenoid valve.
Step 3: Monitor the center plunger for movement
and/or click sound.
Yes - Electrically the solenoid valve is work-
ing but water may not be flowing 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.
Step 6: Locate J8 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 J8-3 WHI/GRAY
wire (positive) and black meter lead on
J8-7 WHI/BLK wire (negative) terminal.
SERVICE
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