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Hoshizaki
KM-900MWF d KM-900MRF3, Note Pressure Switch, Cut-out, 412 ±, Psig, Cut-in, 327 ±
Models:
KM-900MAF
KM-900MRF3
KM-900MWF
KM-900MRF
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Specification
Install
Wiring Diagrams
V. Removal And Replacement Of Components
Maintenance
Complete and detailed explanation of the problem
Check a thermistor for resistance by using the following procedures
Defrost Timer
d CONTROLS AND ADJUSTMENTS
Setting
Page 33
Image 33
[d]
KM-900MRF3
Note: Pressure Switch
Cut-out
412 ±
21
PSIG
0
Cut-in
327 ± 21
PSIG
33
Page 32
Page 34
Page 33
Image 33
Page 32
Page 34
Contents
KM-900MAF KM-900MWF KM-900MRF KM-900MRF3
HOSHIZAKI MODULAR CRESCENT CUBER
MODELS
Complete and detailed explanation of the problem
Phone 1-800-233-1940 Technical Service
HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GA
Attn HOSHIZAKI Technical Support Department
CONTENTS
V. REMOVAL AND REPLACEMENT OF COMPONENTS
IV. SERVICE DIAGNOSIS
SERVICE FOR REFRIGERANT LINES
a REFRIGERANT RECOVERY
I. SPECIFICATIONS 1. KM-900MAF
2. KM-900MWF
3. KM-900MRF
4. KM-900MRF3
5. CONDENSING UNIT URC-12F
SPECIFICATIONS MODEL URC-12F
II. GENERAL INFORMATION
1. CONSTRUCTION
a KM-900MAF
b KM-900MWF
c KM-900MRF
d KM-900MRF3
2. CONTROLLER BOARD
Features of Control Products “E” Controller Board
a SOLID-STATE CONTROL
b CONTROLLER BOARD
3 High Temperature Safety - 127 ± 7F
2 Defrost Timer
4 Low Water Safety
6 LED Lights and Audible Alarm Safeties
1 Minute Fill Cycle
1 beep every 3 sec. = High Evaporator Temperature 127 F
Harvest Cycle
Freeze Cycle
Control Products HOS-001A Board
IMPORTANT Water Valve opening is limited to 6 minutes
c SEQUENCE 1st Cycle
IMPORTANT Water Valve opening is limited to 6 minutes
2nd Cycle and after with pump drain
IMPORTANT Water Valve opening is limited to 6 minutes
2nd Cycle and after with no pump drain
d CONTROLS AND ADJUSTMENTS
Check a thermistor for resistance by using the following procedures
Temperature F
i Disconnect the connector K3 on the board
2 Defrost Timer
The Drain Timer is factory-adjusted, and no adjustment is required
3 Drain Timer
SETTING
Dip Switch
e CHECKING THE CONTROLLER BOARD
After the 1 minute water supply cycle, the defrost cycle starts
At this point, the unit should start the defrost cycle
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT a KM-900MAF
III. TECHNICAL INFORMATION
b KM-900MWF
c KM-900MRF and KM-900MRF3
a KM-900MAF
2. WIRING DIAGRAMS
b KM-900MWF
Note Pressure Switch
Cut-out
412 ±
c KM-900MRF
Note Pressure Switch
Cut-out
412 ±
d KM-900MRF3
Note Pressure Switch
Cut-out
412 ±
3. TIMING CHART
If Float Sw. is OFF
From Defrost Cycle To Defrost Cycle
Control
To Freeze Cycle From Freeze Cycle
4. PERFORMANCE DATA a KM-900MAF
b KM-900MWF
c KM-900MRF
b KM-900MRF3
PROBLEM
IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION
POSSIBLE CAUSE
REMEDY
PROBLEM
POSSIBLE CAUSE
REMEDY
PROBLEM
POSSIBLE CAUSE
REMEDY
2. EVAPORATOR IS FROZEN UP
3. LOW ICE PRODUCTION
a See chart 1 - 3, and check dirty Air Filter or Condenser
4. ABNORMAL ICE
5. OTHERS
Solenoid Valve, water system
1. SERVICE FOR REFRIGERANT LINES
V. REMOVAL AND REPLACEMENT OF COMPONENTS
a REFRIGERANT RECOVERY
b EVACUATION AND RECHARGE R-404A
2. BRAZING DANGER
3. REMOVAL AND REPLACEMENT OF COMPRESSOR IMPORTANT
17 Replace the panels in their correct positions
18 Turn on the power supply
5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE
4. REMOVAL AND REPLACEMENT OF DRIER
6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE AND LINE VALVE
3 Recover the refrigerant and store it in an approved container
1 Turn off the power supply 2 Remove the panels
5 Disconnect the Hot Gas Valve or Line Valve using brazing equipment
6 Install the new valve
7. REMOVAL AND REPLACEMENT OF EVAPORATOR IMPORTANT
Page
9. ADJUSTMENT OF WATER REGULATING VALVE - WATER-COOLED MODEL ONLY
Page
Thermistor Lead
11. REMOVAL AND REPLACEMENT OF THERMISTOR CAUTION
Cable Tie
Foam Insulation
Min. 4-3/4 Liquid Bypass Flow
12. REMOVAL AND REPLACEMENT OF FAN MOTOR
14. REMOVAL AND REPLACEMENT OF PUMP MOTOR
13. REMOVAL AND REPLACEMENT OF WATER VALVE
15. REMOVAL AND REPLACEMENT OF SPRAY TUBES
1. PREPARING THE ICEMAKER FOR LONG STORAGE
VI. MAINTENANCE AND CLEANING INSTRUCTIONS
7 Move the Control Switch to the “ICE” position
2 Move the Control Switch, on the Control Box, to the “OFF” position
3 Drain the Potable Water Tank 1 Turn off the power supply
2 Move the Control Switch to the “OFF” position
2. CLEANING
CLOSED POSITION
OPEN POSITION
a CLEANING PROCEDURE
b SANITIZING PROCEDURE - Following Cleaning Procedure
3. MAINTENANCE
