Hoshizaki M029-897 service manual Contents

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CONTENTS

IMPORTANT
This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this manual carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this manual for any further reference that may be necessary.
CONTENTS
Important Safety Information	4
I. Construction and Water/Refrigeration Circuit Diagram	6
A. Construction	6
B. Water/Refrigeration Circuit Diagram	7
II. Sequence of Operation and Service Diagnosis	8
A. Sequence of Operation Flow Chart	8
B. Sequence of Operation	9
1. Startup Cycle	9
2. Harvest Cycle	9
3. Freeze Cycle	9
4. Shutdown	10
C. Service Diagnosis Table	11
D. Bin Control Check and Cleaning	14
1. Bin Control Check	14
2. Bin Control Cleaning	15
E. Evaporator Thermistor Check	16
III. Controls and Adjustments	17
A. Control Switch	17
B. Control Board	17
1. Control Board Layout	18
C. Control Buttons	19
D. Control Board Settings	20
E. Control Board Information Display	23
F. Control Board Model Code Setting	25
1. Control Board Replacement	25
2. Checking or Changing the Control Board Model Code	25
G. Error Codes	27
H. Quick Adjustments	28
1. Dimple Diameter	28
2. Ice Clarity	29
IV. Refrigeration Circuit and Component Service Information	30
A. Refrigeration Circuit Service Information	30
B. Component Service Information	32
V. Maintenance	34
VI. Preparing the Icemaker for Periods of Non-Use	35
VII. Disposal	36
VIII. Technical Information	37
A. Specification Data	37
B. Performance Data	38
C. Wiring Diagram	39

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Contents Stackable Square Cuber Model IM-500SAA HoshizakiHoshizaki America, IncAttn Hoshizaki Technical Support Department Complete and detailed explanation of the problemPhone 1-800-233-1940 770 Fax 618 Highway 74 South Peachtree City, GACONTENTS appliance or property Important Safety Informationserious injury Indicates a situation which could result in damage to theWARNING, continued I. Construction and Water/Refrigeration Circuit Diagram A. Construction1. Air-Cooled Model SAA Water Tank B. Water/Refrigeration Circuit DiagramIM Control Board II. Sequence of Operation and Service DiagnosisA. Sequence of Operation Flow Chart Shutdown and Restart Sequence Flow Chart3. Freeze Cycle B. Sequence of Operation1. Startup Cycle 2. Harvest Cycle4. Shutdown No Ice Production - Possible Cause C. Service Diagnosis TableSlab Does Not Break Into Separate Cubes - Possible Cause Low Ice Production - Possible CauseLong Harvest Cycle Long Freeze CycleCloudy Cubes - Possible Cause 1. Bin Control Check D. Bin Control Check and Cleaning2. Bin Control Cleaning E. Evaporator Thermistor Check B. Control Board III. Controls and Adjustments A. Control Switch1. Control Board Layout IM Control BoardPart Number P01873-01 Version 1.3A or Later 1. RESET Button 2. SERVICE 1 and SERVICE 2 ButtonsC. Control Buttons D. Control Board Settings water supply time 1 CB Setting 12 timer terminates Freeze Cycle Water Supply Time 1 Partial Drain CBFreeze Cycle Water Supply Time 2 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 valueFreeze cycles interrupted by bin control shutdown example, 655,350 cycles1.0A, displays as follows F. Control Board Model Code Setting 1. Control Board Replacement2. Checking or Changing the Control Board Model Code Page G. Error Codes b To decrease dimple diameter H. Quick Adjustments1. Dimple Diameter a To increase dimple diameter2. Ice Clarity Normal PositionDrain Position IV. Refrigeration Circuit and Component Service Information A. Refrigeration Circuit Service Information1. Refrigerant Recovery 3. Evacuation and Recharge R-404A 2. BrazingB. Component Service Information G. Water Pan Assembly Refer to illustration for assemblyAssembly J. Pump Motor AssemblyV. Maintenance VI. Preparing the Icemaker for Periods of Non-Use 1. Remove the water from the icemaker water supply line2. Drain the water tank VII. Disposal A. Specification Data VIII. Technical Information1. IM-500SAA B. Performance Data 1. IM-500SAA C. Wiring Diagram