Control Board Layout; K Control Board (2A8242-02) - Hoshizaki KM-420MWJ Service Manual

A. Control Board Layout

1. K Control Board (2A8242-02)

• "ALARM RESET" Button (white)
• Bin Control Switch
BC OPEN/CLOSED
LED (yellow)
• K9 (white)
(Cleaning and
Sanitizing Circuit)
• Ext. Harvest LED
(yellow)
• Alarm Buzzer
• 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 #3
• LED 3 (X3 Relay)
LED 3 on:
K1 Connector Pin #4
• LED 5 (X5 Relay)
LED 5 on:
K1 Connector Pin #5
• LED 4 (X4 Relay)
K1 Connector Pin #6
• LED 1 (X1 Relay)
K1 Connector Pin #9
K Control Board
• S4 Dip Switch
• K2 Connector
Control Transformer
(10.5VAC)
Control Board
Part Number 2A8242-02
53
• "OUTPUT TEST" Button (black or blue)
(used to test relays on control board)
• K3 (white) Connector
(5VDC)
Thermistor
(harvest control and high
temperature safety)
• K4 (red) Connector (5VDC)
Ultrasonic Bin Control
Control Board
• S5 Dip Switch
• K5 (black) Connector (2VDC)
Float Switch
• Part Number
• K1 Connector
Pins #1 through #10
#1 Hot Gas Valve (#2) and
Fan Motor/Liquid Line
Valve (#3) Power Supply
#2 Hot Gas Valve
#3 Fan Motor
Liquid Line Valve
#4 Pump Motor
#5 Drain Valve
#6 Inlet Water Valve
#7, 8 Open
#9 Compressor Relay,
Pin #1 Power Supply
(Hot Gas Valve (#2) and
Fan Motor/Liquid Line
Valve (#3))
#10 Component Power Supply