Hoshizaki M029-897 service manual F. Control Board Model Code Setting, Control Board Replacement

Page 25

F. Control Board Model Code Setting

F. Control Board Model Code Setting

1. Control Board Replacement

WARNING

•This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire.

•Move the control switch to the "OFF" position and turn off the power supply. Place the disconnect in the "OFF" position. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

1)Move the control switch to the "OFF" position and turn off the power supply. Place the disconnect in the "OFF" position. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

2)Remove the front cover and control box cover.

3)Disconnect all the connectors from the control board.

4)Remove the old control board and install the new control board (P01873-01 Version 1.3A or Later).

5)Connect the connectors to the new control board.

6)Replace the control box cover in its correct position.

7)Turn on the power supply, then move the control switch to the "ICE" position.

8)"00" appears in the display of the new control board.

9)Press the "SERVICE 1" button to increase the first digit in the display and the "SERVICE 2" button to increase the second digit. Digits appear in the following order: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F. When a valid model code is displayed, the dot in the bottom right of the display turns on. For IM-500SAA, set model code to "08".

10)When the desired model code is displayed, press the "RESET" button to save the setting. "on" appears in the display.

11)Replace the front panel in its correct position.

2.Checking or Changing the Control Board Model Code

1)With unit on, press and hold the "SERVICE 1" button for 3 seconds. Display changes to "n1".

2)Use the "SERVICE 1" and "SERVICE 2" buttons to move through the list until "h6" is displayed.

3)Press the "RESET" button to view the current model code. To change the model code, continue through the remaining steps; otherwise, the display returns to normal if no buttons are touched for 20 sec.

4)Press and hold the "SERVICE 1" and "SERVICE 2" buttons simultaneously for 15 sec. "00" appears in display.

25

Image 25

Contents Stackable Square Cuber Model IM-500SAA HoshizakiHoshizaki America, IncPhone 1-800-233-1940 770 Fax Complete and detailed explanation of the problem618 Highway 74 South Peachtree City, GA Attn Hoshizaki Technical Support DepartmentCONTENTS serious injury Important Safety InformationIndicates a situation which could result in damage to the appliance or propertyWARNING, continued A. Construction I. Construction and Water/Refrigeration Circuit Diagram1. Air-Cooled Model SAA Water Tank B. Water/Refrigeration Circuit DiagramA. Sequence of Operation Flow Chart II. Sequence of Operation and Service DiagnosisShutdown and Restart Sequence Flow Chart IM Control Board1. Startup Cycle B. Sequence of Operation2. Harvest Cycle 3. Freeze Cycle4. Shutdown No Ice Production - Possible Cause C. Service Diagnosis TableLong Harvest Cycle Low Ice Production - Possible CauseLong Freeze Cycle Slab Does Not Break Into Separate Cubes - Possible CauseCloudy 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 SwitchIM 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 2. Use the SERVICE 1 and SERVICE 2 buttons to move through the list E. Control Board Information Display3. Press the RESET button to view the item’s value 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 1. Dimple Diameter H. Quick Adjustmentsa To increase 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 3. Evacuation and Recharge R-404A 2. BrazingB. Component Service Information Assembly Refer to illustration for assemblyJ. Pump Motor Assembly 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 1. IM-500SAA C. Wiring Diagram