Hoshizaki HUR40A(-D), HWR40A(-D), HUR96A(-D), HUR68A(-D), HWR68A(-D) Problem Possible Cause Remedy

Problem		Possible Cause		Remedy
[5]	Cabinet	a)Setpoint and/or	1. Incorrect.	1. Correct setting(s).
	temperature too	Differential		See sections "II.D.2.b)" and
	high.			"II.D.3.c)" for defaults.
		b)Door	1. Not sealing, opened	1. Check for sealing, check for
			frequently or open for	door open at time of warm
			long intervals.	cabinet temperature.
		c) Defrost	1. Defrost time	1. See "[8] Evaporator does
			insufficient to remove	not defrost completely."
			frost.
			Operation in humid
			conditions.
		d)Refrigerant	1. Leak.	1. Repair leak and recharge.
		e)Fan Motor	1. Defective.	1. Check and replace.
		f) Air Filter	1. Clogged.	1. Clean.
		g)Condenser	1. Dirty.	1. Clean.
		h)Thermistor	1. Defective.	1. Check and replace.
		i) Control Board	1. Defective.	1. Replace.
		j) Outside Heat Source	1. Too close to unit.	1. Separate unit from heat
				source.
		k) Air Flow	1. Blockage inside	1. Remove blocakge by removing
			interior.	or redistributing food product.
		l) Warm Food	1. Warm food recently	1. Allow time for unit to return to
			placed in refrigerator.	setpoint temperature.
[6]	Cabinet	a)Power Supply	1. "OFF" position.	1. Move to "ON" position.
	temperature		2. Loose connection(s).	2. Tighten or reconnect.
	display
			3. Failure or tripped	3. Call electrician and/or reset
	indicator does
			breaker.	breaker.
	not illuminate
		b)Control Board	1. Defective.	1. Replace.
	properly.
[7]	Cabinet	a)Setpoint and/or	1. Incorrect.	1. Correct setting(s).
	temperature too	Differential		See sections "II.D.2.b)" and
	low.			"II.D.3.c)" for defaults.
		b)Frozen Food	1. Frozen food recently	1. Allow time for unit to return to
			placed in refrigerator.	setpoint temperature.
		c) Thermistor	1. Defective.	1. Check and replace.
		d)Compressor Relay	1. Defective; contacts	1. Replace.
			welded.
		e)Control Board	1. Defective.	1. Replace.
[8]	Evaporator does	a)Defrost Thermistor	1. Defective.	1. Check and replace.
	not defrost	b)Defrost	1. Not enough defrosts	1. Factory default is once every
	completely.		occurring per day.	6 hours. If coil is frosting too
			Operation in humid	much, can shorten defrost
			conditions.	interval.
		c) Defrost Heaters	1. Defective.	1. Replace heaters.
		d)Safety Defrost	1. Defective, turning off	1. Replace safety defrost
		Thermostat	heaters prematurely,	thermostat.
			or fused open.
		e)Defrost Heater	1. Blown.	1. Determine why fuse blew.
		Temperature Fuse		Replace fuse.

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