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Control Board Fuse
FUNCTION
The control board fuse stops Blended Ice Machine
operation if electrical components fail, causing high amp
draw.
SPECIFICATIONS
Rating 4A 250 volt slow blow.
CHECK PROCEDURE
1. If the LCD display is on, the fuse is good.
!
Warning
Disconnect electrical power to the entire Blended
Ice Machine before proceeding
1. Remove the fuse. Check for continuity across the
fuse with an ohmmeter.
Reading Result
Open (OL) Replace Fuse
Closed (O) Fuse is Good
IO (Input/Output) Board
FUNCTION
Routes signals from sensors to the microprocessor
control board.
Opens and closes relays based on the signals it
receives from the microprocessor control board.
SPECIFICATIONS
24 VAC input
CHECK PROCEDURE
Refer to appropriate fl owchart for the problem you are
encountering. IO board diagnostics are covered by a
process of elimination in the individual fl ow charts.
1. Reboot machine by moving toggle switch off/on
2. If the IO board has lights energized go to step 7.
3. Verify line voltage is present and the power switch is
in the On position.
4. Verify primary voltage is present at the transformer
primary.
5. Verify secondary voltage (24 VAC) is supplied to the
IO board.
6. Verify the IO board fuse is good.
7. Verify 5 VDC at test locations on IO board.
8. Verify 24 VDC at test locations on IO board.
24 VAC test across the two pins
test points and ground
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