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Hoshizaki
KM-900MRF3, KM-900MWF service manual Wiring Diagrams, a KM-900MAF
Models:
KM-900MAF
KM-900MRF3
KM-900MWF
KM-900MRF
1
30
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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 30
Image 30
2. WIRING DIAGRAMS
[a]
KM-900MAF
Note: Pressure Switch
Cut-out
412 ±
21
PSIG
0
Cut-in
327 ± 21
PSIG
30
Page 29
Page 31
Page 30
Image 30
Page 29
Page 31
Contents
KM-900MAF KM-900MWF KM-900MRF KM-900MRF3
HOSHIZAKI MODULAR CRESCENT CUBER
MODELS
HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GA
Phone 1-800-233-1940 Technical Service
Complete and detailed explanation of the problem
Attn HOSHIZAKI Technical Support Department
CONTENTS
SERVICE FOR REFRIGERANT LINES
IV. SERVICE DIAGNOSIS
V. REMOVAL AND REPLACEMENT OF COMPONENTS
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
a SOLID-STATE CONTROL
Features of Control Products “E” Controller Board
2. CONTROLLER BOARD
b CONTROLLER BOARD
4 Low Water Safety
2 Defrost Timer
3 High Temperature Safety - 127 ± 7F
6 LED Lights and Audible Alarm Safeties
Harvest Cycle
1 beep every 3 sec. = High Evaporator Temperature 127 F
1 Minute Fill Cycle
Freeze Cycle
Control Products HOS-001A Board
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
IMPORTANT Water Valve opening is limited to 6 minutes
d CONTROLS AND ADJUSTMENTS
i Disconnect the connector K3 on the board
Temperature F
Check a thermistor for resistance by using the following procedures
2 Defrost Timer
SETTING
3 Drain Timer
The Drain Timer is factory-adjusted, and no adjustment is required
Dip Switch
e CHECKING THE CONTROLLER BOARD
At this point, the unit should start the defrost cycle
After the 1 minute water supply cycle, the defrost cycle starts
III. TECHNICAL INFORMATION
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT a KM-900MAF
b KM-900MWF
c KM-900MRF and KM-900MRF3
2. WIRING DIAGRAMS
a KM-900MAF
Cut-out
Note Pressure Switch
b KM-900MWF
412 ±
Cut-out
Note Pressure Switch
c KM-900MRF
412 ±
Cut-out
Note Pressure Switch
d KM-900MRF3
412 ±
3. TIMING CHART
If Float Sw. is OFF
From Defrost Cycle To Defrost Cycle
To Freeze Cycle From Freeze Cycle
Control
4. PERFORMANCE DATA a KM-900MAF
b KM-900MWF
c KM-900MRF
b KM-900MRF3
POSSIBLE CAUSE
IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION
PROBLEM
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
a REFRIGERANT RECOVERY
V. REMOVAL AND REPLACEMENT OF COMPONENTS
1. SERVICE FOR REFRIGERANT LINES
b EVACUATION AND RECHARGE R-404A
2. BRAZING DANGER
3. REMOVAL AND REPLACEMENT OF COMPRESSOR IMPORTANT
18 Turn on the power supply
17 Replace the panels in their correct positions
4. REMOVAL AND REPLACEMENT OF DRIER
5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE
6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE AND LINE VALVE
5 Disconnect the Hot Gas Valve or Line Valve using brazing equipment
1 Turn off the power supply 2 Remove the panels
3 Recover the refrigerant and store it in an approved container
6 Install the new valve
7. REMOVAL AND REPLACEMENT OF EVAPORATOR IMPORTANT
Page
9. ADJUSTMENT OF WATER REGULATING VALVE - WATER-COOLED MODEL ONLY
Page
Cable Tie
11. REMOVAL AND REPLACEMENT OF THERMISTOR CAUTION
Thermistor Lead
Foam Insulation
12. REMOVAL AND REPLACEMENT OF FAN MOTOR
Min. 4-3/4 Liquid Bypass Flow
13. REMOVAL AND REPLACEMENT OF WATER VALVE
14. REMOVAL AND REPLACEMENT OF PUMP MOTOR
15. REMOVAL AND REPLACEMENT OF SPRAY TUBES
VI. MAINTENANCE AND CLEANING INSTRUCTIONS
1. PREPARING THE ICEMAKER FOR LONG STORAGE
3 Drain the Potable Water Tank 1 Turn off the power supply
2 Move the Control Switch, on the Control Box, to the “OFF” position
7 Move the Control Switch to the “ICE” position
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