Hoshizaki ROX-20TB2-U service manual III. Service Information Error Codes, Service Diagnosis

III.SERVICE INFORMATION

1. ERROR CODES

Lamp	No.	Error	Problem	Operation	Control panel
					display
			Flow rate stayed below 0.13	Production stops after
Error	E11	Low water	gal/min (0.5 L/min) for 10 sec	water valve turns off	Error no.
			with water valve on	two times
			Flow rate stayed above 0.13	Production stops after
Error	E14	Water shutoff	gal/min (0.5 L/min) for 10 sec	water valve turns on	Error no.
			with water valve off	two times
Error	E53	Contactor supply	Current stayed below 0.5A for 2	Production stops after	Error no.
			sec	contactor switches
				three times
Error	E61	Flow switching	Switching did not complete	Production stops	Error no.
		valve	within 30 sec
			Open circuit [-22°F (-30°C)] or	Production continues	Alternate between
—	E74	Thermistor		as 41°F (5°C) (open	normal display
			short circuit [140°F (60°C)]	circuit) or 86°F (30°C)
					and error no.
				(short circuit)
		Float switch (if	Upper switch on, lower switch	Production continues	Alternate between
—	E82	provided with			normal display
		tank)	off	(for at least 3 min)	and error no.
Add salt			Salt water pump stayed at 700
	—	Salt water level	spm (strokes per minute) for 90	Production stops	(Add salt lamp on)
water
			sec
—	EE1	Model setting	Model setting connector lost or	Production stops	Error no.
			wrong
Error	EF0	Control board	EEPROM error	Production stops	Error no.

2. SERVICE DIAGNOSIS

Lamp	Error code	Problem	Check	Possible cause	Remedy
Add salt	—	Salt water pump stayed	Salt water tank	Low salt water	Add salt in salt
water		700 spm (strokes per		concentration	water tank
		minute) for 90 sec	Salt water hose	Loose connection to	Reconnect
				salt water tank
				Clogged	Unclog
				Vapor lock	Prime
			Filter	Dirty	Clean
			Switching	Defective	Repair or replace
			regulator	DC supply line open	Correct
			(electrolytic cell)	circuit
			Magnetic switch	Defective	Repair or replace
				Bad contacts	Repair
			Relay	Defective	Repair or replace
				Bad contacts	Repair
			Current sensor	Defective	Repair or replace

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