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KM-901MRJZ
Hoshizaki KM-901MRJZ Service Manual
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Models
KM-901MAJ, MWJ, MRJ/3
KM-1100MAJ, MWJ, MRJ
KM-1340MAJ, MWJ, MRJ/3
KM-1601MRJ/3
Modular Crescent Cuber
Se
rv
ice
Ma
nu
al
Number: 73213
Issued: 1-30-2018
Revision: 11-23-2020
hoshizakiamerica.com
2
Table of Contents
Table of Contents
3
Important Safety Information
5
Construction and Water/Refrigeration Circuit Diagram
7
Construction
7
Air-Cooled Models (MAJ)
7
Water-Cooled Models (MWJ)
8
Remote Models (MRJ/3)
9
Water/Refrigeration Circuit Diagram
10
Air-Cooled Models (MAJ)
10
Water-Cooled Models (MWJ)
11
Remote Models (MRJ/3)
12
Sequence of Operation and Service Diagnosis
13
Sequence of Operation Flow Chart
13
Service Diagnosis
16
Freeze-Time Correction Cycle (90 Min.)
23
Control Board Check
25
Bin Control Check
26
Float Switch Check and Cleaning
27
Float Switch Check
27
Float Switch Cleaning
28
Thermistor Check
29
Control Switch
29
Diagnostic Tables
30
Low Ice Production
33
Freeze-Up Check List
34
Controls and Adjustments
35
Control Board Layout
36
LED Lights and Audible Alarm Safeties
37
Settings and Adjustments
38
Default Dip Switch Settings
38
Harvest Timer (S4 Dip Switch 1 & 2)
39
Pump-Out Timer/Harvest Time During Pump-Out (S4 Dip Switch 3 & 4)
39
Pump-Out Frequency Control (S4 Dip Switch 5)
40
Harvest Pump Time (Harvest Assist) (S4 Dip Switch 6)
40
Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 Dip Switch 7)
41
Factory Use (S4 Dip Switch 8)
41
Freeze Timer (S4 Dip Switch 9 & 10)
42
Float Switch Selector (S5 Dip Switch 1)
42
Refill Counter (S5 Dip Switch 2 and 3)
42
Minimum Harvest Time (S5 Dip Switch 4)
43
Anti-Slush (S5 Dip Switch 5)
43
Control Switch
43
Refrigeration Circuit and Component Service Information
44
Refrigeration Circuit Service Information
44
Component Service Information
47
Water Regulating Valve Adjustment (Water-Cooled Model)
47
Maintenance
48
Preparing the Appliance for Periods of Non-Use
49
Disposal
51
Technical Information
52
Specification and Performance Data Sheets
52
Km-901Maj
52
Km-901Mwj
53
KM-901MRJ with URC-9F
54
KM-901MRJ3 with URC-9F
55
Km-1100Maj
56
Km-1100Mwj
57
Km-1100Mrj
58
Km-1340Maj
59
Km-1340Mwj
60
KM-1340MRJ with URC-14F
61
KM-1340MRJ3 with URC-14F
62
KM-1601MRJ with URC-22F
63
KM-1601MRJ3 with URC-22F
64
Wiring Diagrams
65
Km-901M_J, Km-1100M_J
65
KM-1340M_J and KM-1601MRJ
66
KM-1340MRJ3 and KM-1601MRJ3
67
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Instruction Manual
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Hoshizaki KM-901MRJZ Specifications
General
Refrigerant
R-404A
Phase
1
Type
Modular
Production Capacity
900 lbs/24 hrs
Ice Type
Cube
Voltage
208-230V
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