Hoshizaki 73168 service manual Problem Possible Cause Remedy

Problem		Possible Cause				Remedy
[1]	Cabinet	g)	Defrost	1.	Defrost time	1.	See "4. Cabinet Defrost."
	temperature too				insufficient to remove
	high. (continued)				frost. Operation in
					humid conditions.
				2. Incomplete defrost.		2. See "4. Cabinet Defrost."
		h)	Air Filter or Condenser	1.	Clogged, dirty.	1.	Clean.
		i)	Cabinet Fan Motor	1.	Defective.	1.	Check and replace.
		j)	Cabinet Liquid Line	1.	Does not open.	1.	Check and replace.
			Valve
		k)	Service Valve(s)	1.	Partially or completely	1.	Confirm service valve is
					closed.		open.
		l)	Refrigerant	1.	Leak.	1.	Recover, repair leak,
							replace drier, evacuate, and
							recharge.
		m) Expansion Valve		1.	Operating erratically.	1.	Check and replace.
		n)	Compressor	1.	Defective.	1.	See "1.[3] Compressor will
							not start or stops operating."
		o)	Control Board	1.	Defective.	1.	Replace.
[2]	Cabinet temperature	a)	Setpoint and/or	1.	Incorrect.	1.	Correct setting(s).
	too low.		Temperature				See "II.D.4.c) Temperature
			Correction Factor				Setpoint" or
							"II.D.4.f) Temperature
							Correction Factor" for
							defaults.
		b)	Frozen Food	1.	Frozen food recently	1.	Allow time for unit to return
					placed in refrigerator.		to setpoint temperature.
		c)	Cabinet Thermistor	1.	Defective.	1.	Check and replace.
		d)	Cabinet Liquid Line	1.	Does not close.	1.	Check and replace.
			Valve
		e)	Compressor Relay	1.	Defective; contacts	1.	Replace.
					welded.
		f)	Control Board	1.	In alarm or defective.	1.	See "III.A Alarm Signals" or
							replace.

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