Control Board Layout - Hoshizaki KMS-1122MLH Service Manual

A. Control Board Layout
• Bin Control Switch
Closed LED (green)
On with K4 jumper in
place
• Bin Control Switch
Open LED (yellow)
Not used this model
• Part Number
• K6 Connector
• Alarm Buzzer
• Power 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
(energized during harvest
pump timer)
LED 3 off:
K1 Connector Pin #4
(energized in freeze)
• LED 4 (X4 Relay)
K1 Connector Pin #6
"G" Control Board
• "ALARM RESET" Button
ALARM RESET
10 9 8 7 6 5 4 3
K2
1 2 3
• K2 Connector
Control Transformer
(10.5VAC)
"G" Control Board
Part Number 2A3792-01
• S4 Dip Switch
• "OUTPUT TEST" Button
OUTPUT TEST
2 1
ON
• S5 Dip Switch
ON
1 2 3 4 5
X2
X2
X3
X3
X4
X4
X1
X1
• LED 1 (X1 Relay)
K1 Connector Pin #1, #9
26
• K7 Connector
Factory Use Only
• K3 Connector (white)
Thermistor
• K4 Connector (red)
Jumper
• K5 Connector (black)
Float Switch
• Label
(control board revision
level indicated on label
on side of relay)
• K1 Connector
#1, #9 (V) Magnetic Contactor
#2 (P) Hot Gas Valves
(KMS and SRK) and
X10 Relay
#3 (BK) Liquid Line Valves
#4 (R) Pump Motor (freeze)
#5 (DBU) Pump Motor
(harvest pump timer);
X12 Relay and Drain Valve
(pump-out)
#6 (O) Inlet Water Valve and
X11 Relay
#7, #10 (BR) Supply Voltage
#8 Open