Document Outline

• Important Safety Information
• I. Specifications
  • A. Icemaker
    • 1a. KM-901MAH (air-cooled) Auxiliary Code T-0, U-0
    • 1b. KM-901MAH (air-cooled) Auxiliary Code U-1 and Later
    • 2a. KM-901MWH (water-cooled) Auxiliary Code T-0, U-0
    • 2b. KM-901MWH (water-cooled) Auxiliary Code U-1 and Later
    • 3a. KM-901MRH (remote air-cooled) Auxiliary Code T-0, U-0
    • 3b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later
    • 4a. KM-901MRH3 (remote air-cooled) Auxiliary Code T-0, U-0
    • 4b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later
  • B. Condenser Unit
    • 1. URC-9F
• II. General Information
  • A. Construction
    • 1. KM-901MAH (air-cooled)
    • 2. KM-901MWH (water-cooled)
    • 3. KM-901MRH/3 (remote air-cooled)
  • B. Sequence of Operation
    • 1. Sequence Cycles and Shutdown
      • a) "E" Control Board: Auxiliary Code T-0, U-0
      • b) "G" Control Board: Auxiliary Code U-1 and Later
    • 2. Sequence Flow Chart
      • a) "E" Control Board: Auxiliary Code T-0, U-0
      • b) "G" Control Board: Auxiliary Code U-1 and Later
  • C. Control Board
    • 1. Control Board Layout
    • 2. Features
      • a) Maximum Water Supply Period - 6 minutes
      • b) Harvest Backup Timer and Freeze Timer
      • c) High Temperature Safety
      • d) Low Water Safety
      • e) High Voltage and Low Voltage Cut-outs
      • f) LED Lights and Audible Alarm Safeties
    • 3. Controls and Adjustments
      • a) Default Dip Switch Settings
      • b) Harvest Timer (S4 dip switch 1 & 2)
      • c) Pump-Out Timer (S4 dip switch 3 & 4)
      • d) Pump-Out Frequency Control (S4 dip switch 5 & 6)
      • e) Bin Control Selector/Harvest Pump Timer (S4 dip switch 7)
      • f) Factory Use (S4 dip switch 8)
      • g) Freeze Timer (S4 dip switch 9 & 10)
      • h) Float Switch Control (S5 dip switch 1): "G" Control Board
      • i) Refill Counter (S5 dip switch 2 through 5): "G" Control Board
  • D. Bin Control
    • 1. Thermostatic Bin Control: Auxiliary Code T-0, U-0
    • 2. Mechanical Bin Control: Auxiliary Code U-1 and Later
  • E. Float Switch
  • F. Thermistor
  • G. Control Switch
• III. Technical Information
  • A. Water Circuit and Refrigeration Circuit
    • 1. KM-901MAH (air-cooled)
    • 2. KM-901MWH (water-cooled)
    • 3. KM-901MRH/3 (remote air-cooled)
  • B. Wiring Diagrams
    • 1. Thermostatic Bin Control: Auxiliary Code T-0, U-0
      • a) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)
      • b) KM-901MRH (remote air-cooled)
      • c) KM-901MRH3 (remote air-cooled)
    • 2. Mechanical Bin Control: Auxiliary Code U-1 and Later
      • a) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)
      • b) KM-901MRH (remote air-cooled)
      • c) KM-901MRH3 (remote air-cooled)
  • C. Performance Data
    • 1. KM-901MAH (air-cooled)
    • 2. KM-901MWH (water-cooled)
    • 3. KM-901MRH (remote air-cooled)
    • 4. KM-901MRH3 (remote air-cooled)
• IV. Service Diagnosis
  • A. Diagnostic Procedure
  • B. Control Board Check
  • C. Bin Control Check
    • 1. Thermostatic Bin Control Check: Auxiliary Code T-0, U-0
    • 2. Mechanical Bin Control Check and Cleaning: Auxiliary Code U-1 and Later
      • a) Mechanical Bin Control Check
      • b) Mechanical Bin Control Cleaning
  • D. Float Switch Check and Cleaning
    • 1. Float Switch Check
    • 2. Float Switch Cleaning
  • E. Thermistor Check
  • F. Diagnostic Charts
• V. Removal and Replacement of Components
  • A. Service for Refrigerant Lines
    • 1. Refrigerant Recovery
    • 2. Brazing
    • 3. Evacuation and Recharge (R-404A)
  • B. Removal and Replacement of Compressor
  • C. Removal and Replacement of Expansion Valve
  • D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve
  • E. Removal and Replacement of Evaporator
  • F. Removal and Replacement of Air-Cooled Condenser
  • G. Removal and Replacement of Water-Cooled Condenser
  • H. Removal and Replacement of Remote Air-Cooled Condenser
  • I. Removal and Replacement of Water Regulating Valve (water-cooled model)
  • J. Adjustment of Water Regulating Valve (water-cooled model)
  • K. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.) (remote air-cooled model)
  • L. Removal and Replacement of Thermistor
  • M. Removal and Replacement of Fan Motor (air-cooled and remote air‑cooled models)
  • N. Removal and Replacement of Inlet Water Valve
  • O. Removal and Replacement of Pump Motor
  • P. Removal and Replacement of Control Board
• VI. Cleaning and Maintenance
  • A. Cleaning and Sanitizing Instructions
    • 1. Cleaning Procedure
    • 2. Sanitizing Procedure - Following Cleaning Procedure
  • B. Maintenance
  • C. Preparing the Icemaker for Long Storage