Control Board Layout - Hoshizaki KMD-850MAH Service Manual

1. Control Board Layout

Control Products "G" Control Board
"ALARM RESET" Button
Bin Control Switch
Closed LED (green)
Bin Control Switch
Open LED (yellow)
Part Number
Alarm Buzzer
LED 2 (green)
Hot Gas Valve (HGV)
Self-Contained Fan
Motor (FMS) (FMS off
when LED on)
Power LED (red)
(lights when power
is supplied to the
board)
LED 3 (green)
Pump Motor (PM)
(PM on, but LED off,
at freeze cycle)
LED 4 (green)
Inlet Water Valve
(WV)
LED 1 (green)
Compressor (Comp)
Connector K2
Transformer
"OUTPUT TEST" Button
S4 Dip
(used to test relays on board)
Switch
Control Board
Part Number 2A3792-01
18
Connector K3
Harvest Control
(thermistor)
Connector K4
Mechanical Bin
Control
S5 Dip Switch
(factory set -
do not adjust)
Connector K5
Float Switch
Label
(board revision level
indicated on label
on side of relay)
Connector K1
Pins #1 through #10
#1, 9 Magnetic Contactor
#2 Hot Gas Valve (HGV)
#3 Liquid Line Valve (LLV)
#4 Pump Motor (icemaking)
#5 Pump Motor (harvest,
pump out)
#6 Inlet Water Valve (WV)
#7, 10 Supply Voltage
#8 Open
Switch for "C" board
and "ALPINE" board
(service boards only)