C. Service Diagnosis Table | Hoshizaki M029-897 instruction

C. Service Diagnosis Table

C. Service Diagnosis Table

First see "III.G. Error Codes." If there are no recorded errors, refer to the table below.

No Ice Production - Possible Cause

	1. Power Supply		a) Off, blown fuse, or tripped breaker.

			b) Not within specifications.
	2. Fuse (Control Box)		a) Blown.

	3. Control Switch		a) In "OFF" or "WASH" position.

			b) Bad contacts.

	4. High-Pressure Switch		a) Dirty condenser or air filter.

			b) Fan motor not operating.

			c) Refrigerant overcharged.

			d) Bad contacts.

			e) Refrigerant lines or components restricted.

	5. Control Transformer		a) Coil winding open or shorted.
	(115VAC/10.5VAC)

	6. Control Board		a) Error. See "III.G. Error Codes."

			b) Defective.
	7. Bin Control		a) Tripped with bin filled with ice.
	See "II.D. Bin Control Check and
	See "II.D. Bin Control Check and		b) Actuator does not move freely.
	Cleaning"
	Cleaning"		c) Defective.
			c) Defective.

	8. Water Supply		a) Water supply off or improper water pressure.

			b) External water filters restricted.

	9. Inlet Water Valve		a) Screen or orifice restricted.

			b) Coil winding open.
	10. Compressor		a) Compressor relay/magnetic contactor contacts bad or coil winding
			open.
			b) Start capacitor or run capacitor defective (single phase).

			c) Internal protector open.

			d) Start relay contacts bad or coil winding open (single phase).

			e) Defective.

	11. Hot Gas Valve		a) Defective.

	12. Evaporator (Cube Control)		a) Loose, disconnected, or defective.
	Thermistor
	See "II.E. Evaporator Thermistor
	Check"

	13. Pump Motor		a) Mechanical seal worn out.

			b) Defective.

			c) Defective capacitor.
	14. Thermostatic Expansion Valve		a) Bulb loose.

			b) Defective.

	15. Fan Motor		a) Defective.
			b) Defective capacitor.

	16. Water System		a) Water leaks.

11

Image 11

Hoshizaki M029-897 service manual C. Service Diagnosis Table, No Ice Production - Possible Cause

Contents

Stackable Square Cuber Model IM-500SAA HoshizakiHoshizaki America, Inc Attn Hoshizaki Technical Support Department Complete and detailed explanation of the problemPhone 1-800-233-1940 770 Fax 618 Highway 74 South Peachtree City, GA CONTENTS appliance or property Important Safety Informationserious injury Indicates a situation which could result in damage to the WARNING, continued 1. Air-Cooled Model SAA I. Construction and Water/Refrigeration Circuit DiagramA. Construction Water Tank B. Water/Refrigeration Circuit Diagram IM Control Board II. Sequence of Operation and Service DiagnosisA. Sequence of Operation Flow Chart Shutdown and Restart Sequence Flow Chart 3. Freeze Cycle B. Sequence of Operation1. Startup Cycle 2. Harvest Cycle 4. Shutdown No Ice Production - Possible Cause C. Service Diagnosis Table Slab Does Not Break Into Separate Cubes - Possible Cause Low Ice Production - Possible CauseLong Harvest Cycle Long Freeze Cycle Cloudy Cubes - Possible Cause 1. Bin Control Check D. Bin Control Check and Cleaning 2. Bin Control Cleaning E. Evaporator Thermistor Check B. Control Board III. Controls and Adjustments A. Control Switch Part Number P01873-01 Version 1.3A or Later 1. Control Board LayoutIM Control Board C. Control Buttons 1. RESET Button2. SERVICE 1 and SERVICE 2 Buttons D. Control Board Settings Freeze Cycle Water Supply Time 2 Partial Drain CB water supply time 1 CB Setting 12 timer terminatesFreeze Cycle Water Supply Time 1 Partial Drain CB IM-500SAA 4. Press the RESET button to return to list E. Control Board Information Display2. Use the SERVICE 1 and SERVICE 2 buttons to move through the list 3. Press the RESET button to view the item’s value 1.0A, displays as follows Freeze cycles interrupted by bin control shutdownexample, 655,350 cycles 2. Checking or Changing the Control Board Model Code F. Control Board Model Code Setting1. Control Board Replacement Page G. Error Codes b To decrease dimple diameter H. Quick Adjustments1. Dimple Diameter a To increase dimple diameter Drain Position 2. Ice ClarityNormal Position 1. Refrigerant Recovery IV. Refrigeration Circuit and Component Service InformationA. Refrigeration Circuit Service Information 3. Evacuation and Recharge R-404A 2. Brazing B. Component Service Information G. Water Pan Assembly Refer to illustration for assemblyAssembly J. Pump Motor Assembly V. Maintenance 2. Drain the water tank VI. Preparing the Icemaker for Periods of Non-Use1. Remove the water from the icemaker water supply line VII. Disposal 1. IM-500SAA A. Specification DataVIII. Technical Information B. Performance Data 1. IM-500SAA C. Wiring Diagram