Hoshizaki dcm-75ibah service manual 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	5
I. Construction and Water/Refrigeration Circuit Diagrams	7
A. Construction	7
1. DCM-751BAH(-OS)	7
2. DCM-751BWH(-OS)	8
3. Ice Making Unit	9
B. Water/Refrigeration Circuit Diagrams	10
1. DCM-751BAH(-OS)	10
2. DCM-751BWH(-OS)	11
II. Sequence of Operation and Service Diagnosis	12
A. Sequence of Operation Flow Chart	12
B. Service Diagnosis	13
C. Control Board Check	18
D. Bin Control Check	26
E. Float Switch Check and Cleaning	27
F. Diagnostic Tables	29
1. No Ice Production	29
2. Ice/Water Dispensing	31
III. Controls and Adjustments	32
A. Control Board Layout	33
1. DCM-751B_H	33
2. DCM-751B_H-OS	34
B. LED Lights and Audible Alarm Safeties	35
C. Settings and Adjustments	36
1. Default Dip Switch Settings	36
2. Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, 3)	36
3. Drain Frequency Control (S1 dip switch 4)	36
4. Continuous Dispensing Timer (S1 dip switch 5 & 6)	37
5. Bin Control Selector (S1 dip switch 7)	37
6. Bin Control Shutdown Delay (S1 dip switch 8)	37
7. Factory Use (S1 Dip Switch 9 & 10)	37
D. Power Switch, Control Switch, and Dispense Mode Switch	38
IV. Removal and Replacement of Components	40
A. Service for Refrigerant Lines	40
1. Refrigerant Recovery	41
2. Brazing	41
3. Evacuation and Recharge (R-404A)	41

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