Control Board Layout - Hoshizaki KMS-1230MLH Service Manual

1. Control Board Layout

Control Products "G" Control Board
Bin Control Switch
Closed LED (green)
Bin Control Switch
Open LED (yellow)
Part Number
Alarm Buzzer
LED  (green)
Hot Gas Valves (HGV)
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)
Fill Water Valve
(FWV) (when LED 
is off)
Harvest Water Valve
(HWV) (when LED 
is on)
LED 1 (green)
Compressor (Comp)
Connector K
Transformer
Part Number A379-01 (factory); 2A3792-02 (service)
S4 Dip
Alarm Reset Button
Switch
Control Board
Output Test Button
(used to test relays on board)
15
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
# Hot Gas Valves (HGV)
Water Valve Relay
#3 Liquid Line Valves (LLV)
#4 Pump Motor (icemaking)
#5 Pump Motor (harvest)
#6 Fill Water Valve (FWV)
#7 10 Supply Voltage
#8 Open
Switch for "C" board
and "ALPINE" board
(service boards only)