Hoshizaki ROX-20TA-U service manual U8AA5540012

Lamp	Code	Problem	Check	Possible Cause	Remedy
Service	E42	Metering pump	Filter	Dirty.	Clean.
Call		stroke speed
			Salt Water Hose		Unclog.
		exceeds 360spm		Clogged.
		for 60 sec.
				Air inside.	Remove air.
			Water Supply	Too much.	Keep within specified
					range.
	E43	Metering pump	Cell Salt	Too high.	Repeat dispensing to
		stroke speed	Concentration		supply water and
		does not exceed			lower concentration.
		10spm for 60
			Set Voltage	Too high.	Reduce.
		sec.
			Set Amperage	Too low.	Raise.
			Salt Water Tank	Salt water too thick.	Thin.
			Metering Pump Head	Not positioned at	Turn into “E” position.
			Dial	“E”.
Service	E51	Stroke speed	Salt Water Hose	Air inside.	Remove air.
Call		exceeds last
					Unclog.
		stroke speed +		Clogged.
		10spm for 20
			Filter		Clean.
		sec.		Dirty.
			Salt Water Tank	Salt water too thin.	Thicken.
			Switching Power	Defective.	Repair or replace.
			Supply
				DC power supply	Repair.
				line opened.
			Control Panel	Connector in bad	Improve contact.
			Backside Board	contact.
				Parts on board	Repair or replace.
				defective.
			Relay	Bad contact.	Repair or replace.
			Magnetic Contactor	Bad contact.	Repair or replace.
	E52	Abnormal input	Current Sensor	Defective.	Repair or replace.
		from current
					Improve contact or
		sensor		Connector in bad
				contact or open	repair.
				circuit.
			Switching Power	Defective.	Repair or replace.
			Supply
				Connector in bad	Improve contact.
				contact.

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