Hoshizaki 73168 service manual Cabinet Cooling

Problem	Possible Cause			Remedy
[3] Compressor will	f) Voltage	1.	Too low.	1.	Call electrician.
not start or
		2. Too high.		2. Call electrician.
stops operating.
	g)High Pressure Switch	1.	Restricted air flow to	1.	Move unit or increase
(continued)
			condenser.		ventilation.
		2. Condenser air filter		2. Clean.
			and/or condenser
			clogged.
		3. Bad contacts.		3. Check continuity and
					replace.
		4. Condenser fan motor.		4. See [2] a) and b).
	g)High Pressure Switch	5. Refrigerant line or		5. Recover, remove
	(continued)		component plugged or		restriction, replace drier,
			restricted.		evacuate, and recharge.
		6. Refrigerant overcharge.		6. Recover, evacuate, and
					recharge.
		7. Non-condensibles in		7. Recover, replace drier,
			system.		evacuate, and recharge.
	h)Thermistors (cabinet	1.	Defective.	1.	See "II.E. Thermistor
	and rail)				Check."
	i) Compressor Overload	1.	Defective. (open	1.	Replace.
			contacts)
	j) Compressor	1.	Open windings.	1.	Check for continuity and
					replace.
		2. Locked rotor.		2. Replace.
	k) Control Board	1.	In alarm or defective.	1.	See "III.A. Alarm Signals"
					or replace

2. Cabinet Cooling

Problem	Possible Cause				Remedy
[1] Cabinet	a)	Warm Food	1.	Warm food recently	1.	Pre-cool food or allow time
temperature too				placed in cabinet area.		for unit to return to setpoint
high.						temperature.
	b)	Doors/Drawers	1.	Left open, opened too	1.	Close.
				often.
			2. Not sealing, opened		2. Check for sealing, check for
				frequently, or open for		door open at time of warm
				long intervals.		cabinet temperature.
	c)	Outside Heat Source	1.	Too close to unit.	1.	Separate unit from heat
						source.
	d)	Air Flow	1.	Blockage inside	1.	Remove blockage by
				cabinet.		removing or redistributing
						food product.
	e)	Cabinet Thermistor	1.	Defective.	1.	See "II.E. Thermistor
						Check."
	f)	Setpoint and/or	1.	Incorrect.	1.	Correct setting(s).
		Temperature				See "II.D.4.c) Temperature
		Correction Factor				Setpoint" or
						"II.D.4.f) Temperature
						Correction Factor" for
						defaults.

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