Table Of Contents - Hoshizaki DCM-270BAH Service Manual

This manual should be read carefully before the icemaker is serviced. Read
the warnings and guidelines contained in this booklet carefully as they provide
essential information for the continued safe use, service, and maintenance of the
icemaker. Retain this booklet for any further reference that may be necessary.
Important Safety Information ................................................................................................. 5
I. Construction and Water Refrigeration Circuit Diagrams ..................................................... 7
A. Construction .................................................................................................................. 7
B. Water/Refrigeration Circuit Diagrams ............................................................................ 8
II. Sequence of Operation and Service Diagnosis ................................................................. 9
A. Sequence of Operation Flow Chart ............................................................................... 9
B. Service Diagnosis ....................................................................................................... 10
C. Control Board Check ................................................................................................... 14
D. Bin Control Check ....................................................................................................... 23
E. Float Switch Check and Cleaning ............................................................................... 24
F. Diagnostic Tables ......................................................................................................... 26
III. Controls and Adjustments ............................................................................................... 29
A. Control Board Layout .................................................................................................. 30
B. LED Lights and Audible Alarm Safeties ....................................................................... 32
C. Settings and Adjustments ............................................................................................ 33
1. Default Dip Switch Settings .................................................................................... 33
2. Bin Control Shutdown Delay (Infrared Sensor) (S1 dip switch 1, 2, 3) .................. 33
3. Drain Frequency Control (S1 dip switch 4) ............................................................ 33
4. Continuous Dispensing Timer (S1 dip switch 5 & 6) .............................................. 34
5. Bin Control Selector (S1 dip switch 7) ................................................................... 34
6. Bin Control Shutdown Delay (S1 dip switch 8) ...................................................... 34
7. Factory Use (S1 Dip Switch 9 & 10) ....................................................................... 34
D. Switches ...................................................................................................................... 35
IV. Removal and Replacement of Components ................................................................... 36
A. Service for Refrigerant Lines ....................................................................................... 36
1. Refrigerant Recovery ............................................................................................. 37
2. Brazing .................................................................................................................. 37
3. Evacuation and Recharge (R-404A) ...................................................................... 37
B. Important Notes for Component Replacement ............................................................ 38
C. Icemaking Unit ............................................................................................................ 40
1. Upper Bearing Wear Check .................................................................................. 40
2. Removal and Replacement of Extruding Head ...................................................... 41
3. Removal and Replacement of Auger ..................................................................... 41
4. Removal and Replacement of Evaporator ............................................................. 42
5. Removal and Replacement of Mechanical Seal and Lower Housing ................... 43
6. Removal and Replacement of Gear Motor ............................................................ 45
IMPORTANT
CONTENTS
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