Table Of Contents - Hoshizaki DCM-270BAH-OS Service Manual

This manual should be read carefully before the appliance 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
appliance. Retain this booklet for any further reference that may be necessary.
Important Safety Information ................................................................................................. 4
I. Construction and Water Refrigeration Circuit Diagrams ..................................................... 6
A. Construction .................................................................................................................. 6
B. Water/Refrigeration Circuit Diagrams ............................................................................ 7
II. Sequence of Operation and Service Diagnosis ................................................................. 8
A. Sequence of Operation Flow Chart ............................................................................... 8
B. Service Diagnosis ......................................................................................................... 9
C. Control Board Check ................................................................................................... 14
D. Bin Control Check ....................................................................................................... 22
E. Float Switch Check and Cleaning ............................................................................... 24
F. Diagnostic Tables ......................................................................................................... 26
III. Controls and Adjustments ............................................................................................... 30
A. Control Board Layout .................................................................................................. 31
B. LED Lights and Audible Alarm Safeties ....................................................................... 33
C. Settings and Adjustments ............................................................................................ 34
1. Default Dip Switch Settings .................................................................................... 34
2. Bin Control Shutdown Delay (Infrared Sensor) (S1 dip switch 1, 2, 3) .................. 34
3. Drain Frequency Control (S1 dip switch 4) ............................................................ 34
4. Continuous Dispensing Timer (S1 dip switch 5 & 6) .............................................. 35
5. Bin Control Selector (S1 dip switch 7) ................................................................... 35
6. Bin Control Shutdown Initiation Delay (S1 dip switch 8) ........................................ 35
7. Bin Control Shutdown Delay (S1 dip switch 9) ....................................................... 36
8. Factory Use (S1 Dip Switch 10) ............................................................................. 36
D. Switches ...................................................................................................................... 36
IV. Refrigeration Circuit and Component Service Information.............................................. 37
A. Refrigeration Circuit Service Information .................................................................... 37
B. Component Service Information .................................................................................. 40
C. Icemaking Unit ............................................................................................................ 42
V. Maintenance .................................................................................................................... 47
VI. Preparing the Appliance for Periods of Non-Use ............................................................ 48
VII. Disposal ......................................................................................................................... 49
VIII. Technical Information .................................................................................................... 50
A. Specification and Performance Data Sheets ............................................................... 50
1. DCM-270BAH ........................................................................................................ 50
2. DCM-270BAH-OS ................................................................................................. 51
B. Wiring Diagrams .......................................................................................................... 52
1. DCM-270BAH(-OS): .............................................................................................. 52
Serial Number: C10508L to D00829A (except C17634M and C17641M) ............. 52
2. DCM-270BAH(-OS): ............................................................................................. 53
Serial Number: C17634M, C17641M, and D00998A and Later ............................ 53
IMPORTANT
CONTENTS
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