Hoshizaki M029-897 service manual Shutdown

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ET temperature is recorded 30 seconds after PM energizes. Water temperature correction value (CB Setting 13) is added to ET temperature and this is used as WT value in following harvest cycle.

If CBT>81°F (27°C) (CB Setting 74) and CBT≤111°F (44°C) (CB Setting 70), when ET≤-1.3°F (-18.5°C) (CB Setting 2), HGV energizes 5 sec., de-energizes 25 sec., energizes 5 sec. (CB Settings 71 and 72) to reduce bonding of the water tank to the evaporator.

CB monitors time after ET temperature≤32°F (0°C). CB terminates freeze cycle when the following equation is satisfied:

temp. (absolute value) × time (min.) = (absolute value of CB Setting 2) × (CB Setting 3)

Using default settings, freeze cycle is terminated when: temp. (absolute value) × time (min.) = 185

This formula helps maintain consistent dimple size regardless of differences in seasonal ambient and water temperatures.

4. Shutdown

When BC is engaged (open) for more than 10 seconds, the icemaker shuts down after harvest cycle.

When BC is disengaged (closed) for more than 80 seconds, icemaker restarts at startup cycle.

If BC is engaged (open) while the water tank is opening after the power supply is turned on (or after the "RESET" button is pressed), shutdown does not start: Shutdown occurs 10 seconds after actuator motor's internal position sensor indicates water tank is fully open.

Legend: AMD–actuator motor down; AMU–actuator motor up; BC–bin control; CB–control board; CBT–control board thermistor; Comp–compressor; ET–evaporator thermistor; FD–full drain (CB Setting 14); FM–fan motor; HGV–hot gas valve; PM–pump motor; PD–partial drain (CB Setting 14); PS–position sensor; WT–water temperature; WV–inlet water valve

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Contents HoshizakiHoshizaki America, Inc Stackable Square Cuber Model IM-500SAA618 Highway 74 South Peachtree City, GA Complete and detailed explanation of the problemPhone 1-800-233-1940 770 Fax Attn Hoshizaki Technical Support DepartmentCONTENTS Indicates a situation which could result in damage to the Important Safety Informationserious injury appliance or propertyWARNING, continued A. Construction I. Construction and Water/Refrigeration Circuit Diagram1. Air-Cooled Model SAA B. Water/Refrigeration Circuit Diagram Water TankShutdown and Restart Sequence Flow Chart II. Sequence of Operation and Service DiagnosisA. Sequence of Operation Flow Chart IM Control Board2. Harvest Cycle B. Sequence of Operation1. Startup Cycle 3. Freeze Cycle4. Shutdown C. Service Diagnosis Table No Ice Production - Possible CauseLong Freeze Cycle Low Ice Production - Possible CauseLong Harvest 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 BoardIM Control Board 1. Control Board LayoutPart Number P01873-01 Version 1.3A or Later 2. SERVICE 1 and SERVICE 2 Buttons 1. RESET ButtonC. Control Buttons D. Control Board Settings Freeze Cycle Water Supply Time 1 Partial Drain CB water supply time 1 CB Setting 12 timer terminatesFreeze Cycle Water Supply Time 2 Partial Drain CB DO NOT ADJUST 3. Press the RESET button to view the item’s value E. Control Board Information Display2. Use the SERVICE 1 and SERVICE 2 buttons to move through the list 4. Press the RESET button to return to listexample, 655,350 cycles Freeze cycles interrupted by bin control shutdown1.0A, displays as follows 1. Control Board Replacement F. Control Board Model Code Setting2. Checking or Changing the Control Board Model Code Page G. Error Codes a To increase dimple diameter H. Quick Adjustments1. Dimple Diameter b To decrease dimple diameterNormal Position 2. Ice ClarityDrain Position A. Refrigeration Circuit Service Information IV. Refrigeration Circuit and Component Service Information1. Refrigerant Recovery 2. Brazing 3. Evacuation and Recharge R-404AB. Component Service Information J. Pump Motor Assembly Refer to illustration for assemblyAssembly G. Water Pan AssemblyV. Maintenance 1. Remove the water from the icemaker water supply line VI. Preparing the Icemaker for Periods of Non-Use2. Drain the water tank VII. Disposal VIII. Technical Information A. Specification Data1. IM-500SAA B. Performance Data C. Wiring Diagram 1. IM-500SAA