Hoshizaki Ice Maker Control Board: Thermistor Testing and Troubleshooting for Models KM-1301SRH and KM-1301SWH

1. Control Board Layout

"G" Control Board

• Bin Control Switch	• "ALARM RESET" Button	• S4 Dip Switch	• "OUTPUT TEST" Button
			(used to test relays on control board)
Closed LED (green)
(on continuously			• WHITE K3 Connector
in thermostatic bin
			Harvest Control
control application)
			(thermistor)
• Bin Control Switch			• RED K4 Connector
Open LED (yellow)
			K4 Jumper (4A4883G01)
(mechanical bin control
			for Thermostatic Bin
application only)
			Control Application
• Part Number			(KM-1301SAH-E) or
			Mechanical Bin Control
• Alarm Buzzer			(KM-1301SWH-E,
			KM‑1301SRH-E)
• Power LED (red)			• S5 Dip Switch
(lights when power			• BLACK K5 Connector
is supplied to the
control board)			Float Switch
• Relay LEDs			• Label
			(control board revision
(4) (indicate			level indicated on label
which relays are			on side of relay)
energized as listed
below)			• K1 Ten-Pin Connector
• LED 2 (X2 Relay)			Pins #1 through #10
			#1, 9 Magnetic Contactor
Hot Gas Valve (HGV)			#2 Hot Gas Valve (HGV)
Fan Motor (FM)			#3 Liquid Line Valve (LLV),
(FM off when LED on)			Fan Motor (FM)
• LED 3 (X3 Relay)			#4 Pump Motor (icemaking)
			#5 Pump Motor (pump-out,
Pump Motor (PM)
			harvest (if applicable))
(on at pump-out,
			#6 Inlet Water Valve (WV)
harvest (if applicable))
			#7, 10 Component Power
• LED 4 (X4 Relay)			Supply
			#8 Open
Inlet Water Valve (WV)
• LED 1 (X1 Relay)
Compressor (Comp),
Fan Motor-Remote
(FMR)

•K2 Connector

Transformer

"G" Control Board

Part Number 2A3792-01

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