Table Of Contents - Hoshizaki Steelheart B Series 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 Refrigeration Circuit Diagram ................................................................. 8
A. Construction .................................................................................................................. 8
B. Refrigeration Circuit Diagram ...................................................................................... 10
II. Sequence of Operation and Service Diagnosis ................................................................11
A. Sequence of Operation Flow Chart ..............................................................................11
1. UR/WR: Refrigerator ...............................................................................................11
2. SR: Refrigerator ..................................................................................................... 12
3. UF/WF: Freezer ..................................................................................................... 13
B. Service Diagnosis ....................................................................................................... 14
C. Control Module Check ................................................................................................. 20
D. Thermistor Check ........................................................................................................ 23
E. Diagnostic Table .......................................................................................................... 24
III. Controls and Adjustments ............................................................................................... 27
A. Temperature Settings .................................................................................................. 27
B. Defrost ......................................................................................................................... 28
C. Safety Devices ............................................................................................................ 29
D. Perimeter and Mullion Heaters (UF/WF only) .............................................................. 29
IV. Refrigeration Circuit and Component Service Information.............................................. 30
A. Refrigeration Circuit Service Information .................................................................... 32
B. Component Service Information .................................................................................. 35
V. Preparing the Appliance for Periods of Non-Use ............................................................. 36
VI. Disposal .......................................................................................................................... 37
VII. Technical Information ..................................................................................................... 38
A. Electrical and Refrigerant Data ................................................................................... 38
B. Wiring Diagrams .......................................................................................................... 39
1. UR/WR27, UR/WR36, UR/WR48 (except glass door), and SR36 .......................... 39
2. UF/WF27, SR27, and SR48 .................................................................................... 40
3. UR/WR48 (glass door), UR/WR60, and UR/WR72 ............................................... 41
4. UF/WF48, UF/WF60, SR60, and SR72 ................................................................. 42
IMPORTANT
CONTENTS
3