Control Board Layout; A) Km-1601Sah/3 "G" Control Board - Hoshizaki KM-1601SAH/3 Service Manual

1. Control Board Layout

a) KM-1601SAH/3 "G" Control Board

• Bin Control Switch
• "ALARM RESET" Button
Closed LED (green)
(on continuously
in thermostatic bin
control application)
• Bin Control Switch
Open LED (yellow)
(mechanical bin control
application only)
• Part Number
• Alarm Buzzer
• Power LED (red)
(lights when 10.5VAC
is supplied to K2
connector)
• Relay LEDs (green)
(indicate which
relays and 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
(energized during
harvest pump timer)
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
"G" Control Board
• K2 Connector
Control Transformer (10.5VAC)
"G" Control Board
Part Number 2A3792-01
• "OUTPUT TEST" Button
• S4 Dip Switch
(used to test relays on control board)
28
• WHITE K3 Connector
Harvest Control
(thermistor)
• RED K4 Connector
K4 Jumper (4A4883G01)
for Thermostatic Bin
Control Application
• S5 Dip Switch
• BLACK K5 Connector
Float Switch
• Label
(control board revision
level indicated on label
on side of relay)
• K1 Ten-Pin Connector
Pins #1 through #10
#1, 9-LED 1 on:
Compressor Relay/
Magnetic Contactor and
Fan Motor (FM)
#2-LED 2 on: Hot Gas
Valve (HGV); X10 Relay in
Harvest
#3-LED 2 off: Liquid Line
Valve (LLV)
#4-LED 3 off: Pump Motor
(PM) in Freeze
#5-LED 3 on: Pump
Motor (PM) in
Harvest Pump Timer
and Pump-Out
#6-LED 4: Inlet Water Valve
(WV) and X11 Relay
#7, 10 Supply Voltage
#8 Open