Hoshizaki M029-897 service manual B. Component Service Information

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B.Component Service Information

5)Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the nameplate. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

6)A liquid charge is required when charging an R-404A system (to prevent fractionation). Place the service cylinder on the scales; if the service cylinder is not equipped with

a dip tube, invert the service cylinder, then place it on the scales. Open the high-side valve on the gauge manifold.

7)Allow the system to charge with liquid until the proper charge weight is met.

8)If necessary, add any remaining charge to the system through the low-side.

NOTICE! To prevent compressor damage, use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low-side refrigerant access valve with the icemaker running.

9)Close the high and low-side gauge manifold valves, then disconnect the gauge manifold hoses.

10)Cap the refrigerant access valves to prevent a possible leak.

B.Component Service Information

NOTICE

When replacing a component listed below, see the notes to help ensure proper operation.

Component

Notes

Compressor

Install a new start capacitor, run capacitor, and start relay.

 

 

Thermostatic

• Attach the thermostatic expansion valve bulb to the suction line in the same location

Expansion Valve

as the previous bulb.

 

• The bulb should be between the 10 and 2 o'clock positions on the tube.

 

• Secure the bulb with the clamp and holder, then insulate it.

Hot Gas Valve

• Replace the strainer if applicable.

 

• Use copper tube of the same diameter and length when replacing valve lines.

 

 

Fan Motor

Install a new capacitor.

 

 

Pump Motor

Install a new capacitor.

Actuator Motor

Install a new capacitor.

 

 

Evaporator

• Attach the new thermistor to the same location on the evaporator as the previous

(Cube Control)

thermistor.

Thermistor

• Smoothly fill the recessed area of the thermistor holder with high thermal conductive

 

 

type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink

 

Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured

 

by ShinEtsu Silicones), or equivalent are recommended.

 

• Attach the new thermistor in position on the evaporator and press down the

 

thermistor holder over the thermistor.

 

• Be very careful to prevent damage to the leads.

 

 

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Contents HoshizakiHoshizaki America, Inc Stackable Square Cuber Model IM-500SAAComplete and detailed explanation of the problem Phone 1-800-233-1940 770 Fax618 Highway 74 South Peachtree City, GA Attn Hoshizaki Technical Support DepartmentCONTENTS Important Safety Information serious injuryIndicates a situation which could result in damage to the appliance or propertyWARNING, continued 1. Air-Cooled Model SAA I. Construction and Water/Refrigeration Circuit DiagramA. Construction B. Water/Refrigeration Circuit Diagram Water TankII. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow ChartShutdown and Restart Sequence Flow Chart IM Control BoardB. Sequence of Operation 1. Startup Cycle2. Harvest Cycle 3. Freeze Cycle4. Shutdown C. Service Diagnosis Table No Ice Production - Possible CauseLow Ice Production - Possible Cause Long Harvest CycleLong Freeze Cycle Slab Does Not Break Into Separate Cubes - Possible CauseCloudy Cubes - Possible Cause D. Bin Control Check and Cleaning 1. Bin Control Check2. Bin Control Cleaning E. Evaporator Thermistor Check III. Controls and Adjustments A. Control Switch B. Control BoardPart 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 Control Board CB Setting Menu E. Control Board Information Display 2. Use the SERVICE 1 and SERVICE 2 buttons to move through the list3. Press the RESET button to view the item’s value 4. Press the RESET button to return to list1.0A, 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 H. Quick Adjustments 1. Dimple Diametera To increase dimple diameter b To decrease dimple diameterDrain Position 2. Ice ClarityNormal Position 1. Refrigerant Recovery IV. Refrigeration Circuit and Component Service InformationA. Refrigeration Circuit Service Information 2. Brazing 3. Evacuation and Recharge R-404AB. Component Service Information Refer to illustration for assembly AssemblyJ. Pump Motor Assembly G. Water Pan AssemblyV. 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 C. Wiring Diagram 1. IM-500SAA
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