Control Board Layout - Hoshizaki KM-1301SWJ/3 Service Manual

A. Control Board Layout
• Bin Control Switch
Closed LED (green)
• Bin Control Switch
Open LED (yellow)
• Alarm Buzzer
• Ext. Harvest LED
(yellow) (lights
when water line
thermistor initiates
extended harvest)
Not used this model
• POWER OK LED
(red) (lights when
10.5VAC is supplied
to K2 connector)
• Relay LEDs
(4) (indicate which
relays are energized
and which K1
connector pins are
energized
• LED 2 (X2 Relay)
LED 2 on:
K1 Connector Pin #2
LED 2 off:
K1 Connector Pin #3
• LED 3 (X3 Relay)
LED 3 on:
K1 Connector Pin #5
LED 3 off:
K1 Connector Pin #4
(energized in freeze)
• LED 4 (X4 Relay)
K1 Connector Pin #6
• LED 1 (X1 Relay)
K1 Connector Pin #1, #9
"J" Control Board
• "ALARM RESET" Button
• K2 Connector
Control Transformer
(10.5VAC)
"J" Control Board
Part Number
• "OUTPUT TEST" Button
• S4 Dip Switch
(used to test relays on control board)
• Note: Control Boards 2A7664-01 and 2A7664-04
Do not have the Freeze-Time Correction program.
2A7664-01
2A7664-02
2A7664-04
Control Board Shown: 2A7664-04
40
• K3 (white) Connector
Thermistor
(harvest control and
high temperature safety)
• K4 (red) Connector
Bin Control
• S5 Dip Switch
• K5 (black) Connector
Float Switch
(water level)
• Part Number
• K1 Connector
Pins #1 through #10
#1, 9 Compressor Relay
#2 Hot Gas Valve, X12 Relay
#3 Fan Motor
Liquid Line Valve
#4 Pump Motor (icemaking)
#5 Pump Motor
(harvest pump timer and
pump-out)
#6 Inlet Water Valve, X11 Relay
#7, 10 Component Power
Supply
#8 Open