Hoshizaki F-80 I MWH (-c), F-80 I MAH (-c) service manual Problem, Possible Cause, Remedy

Page 36

	PROBLEM		POSSIBLE CAUSE				REMEDY
[4]	Water has been	a)	Gear Motor Fuse	1.	Blown Fuse.	1.	See "3. [3]." Find out
	supplied, Fan Motor		(BUSSMAN GMD				the cause and replace
	starts, but Gear		1.5A)				the Fuse.
	starts, but Gear
	Motor and
	Motor and	b)	Thermal Protector	1.	Bad contacts.	1.	Check for continuity
	Compressor will not	b)	Thermal Protector	1.	Bad contacts.	1.	Check for continuity
	Compressor will not		(Gear Motor)				and replace.
	start.

[5]	Gear Motor and	a)	Pressure Switch	1.	Dirty Air Filter or	1.	Clean.
	Compressor start				Condenser.
	but operate			2.	Ambient or	2.	Get cooler.
	intermittently.			2.	Ambient or	2.	Get cooler.
	intermittently.				condenser water
					temperature too
					warm.
				3.	Condenser water	3.	Check and get
					pressure too low or		recommended
					off. (Water-cooled		pressure.
					model only)

				4.	Water Regulating	4.	Adjust it lower.
					Valve set too high.
					(Water-cooled model
					only)

				5.	Fan not rotating.	5.	See "3. [1] a) Fan
							Motor."
				6.	Refrigerant	6.	Recharge.
					overcharged.
				7.	Refrigerant line or	7.	Clean and replace
					components		drier.
					plugged.
				8.	Bad contacts.	8.	Check for continuity
							and replace.
				9.	Loose connections.	9.	Tighten.

[6]	Gear Motor starts,	a)	X2 Relay on Control	1.	Bad contacts.	1.	Replace.Check for
	but Compressor will		Timer				continuity and replace.
	not start or operates			2.	Coil winding opened.	2.	Replace Timer.
	intermittently.	b)	Starter	1.	Bad contacts.	1.	Check for continuity
							and replace.
				2.	Coil winding opened.	2.	Replace.

				3.	Loose Connections.	3.	Tighten.

		c)	Start Capacitor or	1.	Defective.	1.	Replace.
			Run Capacitor
		d)	Compressor	1.	Loose connections.	1.	Tighten.

				2.	Motor winding	2.	Replace.
					opened or grounded.

				3.	Motor Protector	3.	Find out the cause of
					tripped.		overheat or
							overcurrent.
		e)	Power Supply	1.	Circuit Ampacity too	1.	Install a larger-sized
					low.		conductor.
[7]	Gear Motor and	a)	Refrigerant Line	1.	Gas leaks.	1.	Check for leaks with a
	Compressor start,						leak detector. Reweld
	but no ice is						leak, replace drier and
	but no ice is						charge with
	produced.						charge with
	produced.						refrigerant. The
							refrigerant. The
							amount of refrigerant
							is marked on
							Nameplate or Label.
				2.	refrigerant line	2.	Replace the clogged
					clogged.		component.

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Contents Number Issued Revised “A Superior Degree of Reliability”Modular Flaker Models F-801MAH-C F-801MWH-C HoshizakiHoshizaki America, IncPhone 1-800-233-1940 Technical Service 770 487-2331 Fax Complete and detailed explanation of the problemHOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GA Attn HOSHIZAKI Technical Support DepartmentCONTENTS 5. Removal and Replacement of Expansion Valve 7. Removal and Replacement of Evaporator Assembly8. Removal and Replacement of Fan Motor 9. Removal and Replacement of Control Water ValveI. Specification 1. Icemaker F-801MAHF-801MWH F-801MAH-C F-801MWH-C II. General Information 1. Construction F-801MAH/-CF-801MWH/-C Water Supply Inlet Junction Box Water Regulator Compressor Drier2. Control Box Layout GEAR MOTORCONTROL TIMER FLUSHRUN CAPACITOR III. Technical Information 1. Water Circuit and Refrigeration Circuit F-801MWH/-C 2. Wiring Diagrams F-801MAH/-C, F-801MWH/-C3. Sequence of Electrical Circuit b When reservoir has been filled, gear motor starts immediately c Compressor starts about 60 sec. after gear motor starts Page e Low water except water-cooled model Page Page h When flush timer operates for 15 min. every 12 hours Page Page 4. Timing Chart Miswiring. Circuit Protect Relay operatesProper wiring. The unit starts 150 sec 1 sec60 sec 1. CIRCUIT PROTECT RELAY 2. WATER LEVEL UPPER 3. FLOAT SWITCH LOWER 5. Performance Data WATER FLOW FOR CONDENSER F-801MAH-C F-801MWH-C IV. Adjustment of Components 1. Adjustment of Water Regulating Valve water-cooled model only2. Adjustment of Flake Size V. Service Diagnosis 1. No Ice Production PROBLEMPOSSIBLE CAUSE REMEDYPROBLEM PROBLEM 2. Low Ice ProductionPOSSIBLE CAUSE REMEDY3. Other VI. Removal and Replacement of Components 1. Service for Refrigerant Linesa Refrigerant Recovery b Evacuation and Recharge R-404A2. Brazing DANGER 3. Removal and Replacement of Compressor 4. Removal and Replacement of Drier 5. Removal and Replacement of Expansion Valve Page 7. Removal and Replacement of Evaporator Assembly CutterExtruding Head AugerBearing-Lower and Mechanical Seal Gear Motor27 When replacing the evaporator c Check for leaks using nitrogen gas 140 PSIG and soap bubbles28 Move the flush switch to the ICE position 30 Turn on the power supplyAuger Mechanical Seal O-ring Bearing Lower Bolt Washer Coupling - SplineRubber O-ring Nylon Ring Bolt Washer Cutter Extruding Head Washer Socket Head Cap Screw Evaporator Washer Socket Head Cap Screw Barrier8. Removal and Replacement of Fan Motor 9. Removal and Replacement of Control Water Valve10. Removal and Replacement of Flush Water Valve VII. Cleaning and Maintenance 1. Preparing the Icemaker for Long Storage2. Cleaning and Sanitizing Instructions a Cleaning Solutionb Cleaning Procedure c Sanitizing Solution d Sanitizing Procedure - Initiale Sanitizing Procedure - Final 18 Move the flush switch to the “ICE” position and run the icemaker 19 Turn off the power supply after 30 minutes21 Flush out any solution from the storage bin 22 Turn on the power supply and start the automatic icemaking process3. Maintenance 3 Air Filter air-cooled model only 4 Condenser except water-cooled model