Hoshizaki KM-1300MRH, KM-1300MWH, KM-1300MAH service manual Abnormal ICE, Others

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4. ABNORMAL ICE

PROBLEM

POSSIBLE CAUSE

REMEDY

[1] Small Cube

a) Ice Cube Guide

1. Out of position.

1. Place in position.

 

 

Circulated water falls into

 

 

 

bin.

 

 

b) See chart 1 - [5], and check water supply line, Water

Solenoid Valve, water system,

 

Pump Motor or Controller Board.

 

 

c) Drain Valve

1. Dirty.

1. Clean.

[2] Cloudy or

a) See chart 2 - [1] and - [3], and check Float Switch, Water Solenoid Valve,

irregular cube

Controller Board, Spray Tubes, water system, refrigerant charge or Expansion

 

Valve.

 

 

 

b) Spray Guide

1. Dirty.

1. Clean.

 

c) Water Quality

1. High hardness or contains

1. Install a water filter or

 

 

impurities.

softener.

 

 

 

 

5. OTHERS

PROBLEM

POSSIBLE CAUSE

REMEDY

[1] Icemaker will

a) Bin Control

1. Set too cold.

1. Adjust warmer.

 

not stop when

Thermostat

2. Defective.

2. Replace.

bin is filled

 

 

 

 

 

with ice.

 

 

 

 

 

[2] Abnormal

a) Pump Motor

1. Bearings worn out.

1. Replace.

noise

 

b) Fan Motor

1. Bearings worn out.

1. Replace.

 

 

 

 

 

2. Fan blade deformed.

2. Replace fan blade.

 

 

 

 

3. Fan blade does not move

3. Replace.

 

 

 

 

freely.

 

 

 

 

 

 

 

 

 

 

 

 

c) Compressor

1. Bearings worn out, or

1. Replace.

 

 

 

 

cylinder valve broken.

 

 

 

 

 

 

 

2. Mounting pad out of

2. Reinstall

 

 

 

 

position.

 

 

 

 

 

 

d) Refrigerant Lines

1. Rub or touch lines or other

1. Replace.

 

 

 

 

 

surfaces.

 

 

 

[3] Ice in storage

a) Bin Drain

1. Plugged.

1. Clean.

bin often

 

 

 

 

 

melts.

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents KM-1300MAH KM-1300MWH KM-1300MRH Hoshizaki AMERICA, INC Contents Maintenance KM-1300MAH Air-cooled Specifications2a. KM-1300MWH Water-cooled 2b. KM-1300MWH Water-cooled Serial No. M10156D KM-1300MRH Remote air-cooled Condensing Unit URC-12F Specifications Model URC-12F II. General Information Construction KM-1300MWH Water-cooled KM-1300MRH Remote air-cooled Controller Board Features of Control Products E Controller BoardSOLID-STATE Control Controller BoardPage Minute Fill Cycle Beep every 3 sec. = High Evaporator Temperature 127 FHarvest Cycle Freeze CycleControl Products HOS-001A Board Sequence 1st Cycle 2nd Cycle and after with pump drain 2nd Cycle and after with no pump drain Controls and Adjustments Setting Time Setting Frequency Checking the Controller Board Page III. Technical Information KM-1300MWH Water-cooled KM-1300MRH Remote air-cooled KM-1300MAH Air-cooled and KM-1300MWH Water-cooled Wiring DiagramsCut-out 412 ±21.3 Psig Cut-in 327±21.3 Psig Timing Chart Page Performance Data Serial # L00001F to M10155C KM-1300MWH Water-cooled Serial # M10156D KM-1300MRH Remote air-cooled Problem Possible Cause Remedy IV. Service Diagnosis No ICE ProductionController Board Problem Possible Cause Remedy LOW ICE Production Evaporator is Frozen UPOthers Abnormal ICEEvacuation and Recharge R-404A Service for Refrigerant LinesRefrigerant Recovery Brazing Removal and Replacement of Compressor Important Removal and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of HOT GAS Valve and Line Valve Removal and Replacement of Evaporator Important Page Page Page Removal and Replacement of Thermistor Important Removal and Replacement of FAN Motor Removal and Replacement of Pump Motor Removal and Replacement of Water ValveRemoval and Replacement of Spray Tubes Preparing the Icemaker for Long Storage VI. Maintenance and Cleaning InstructionsPage Cleaning Cleaning Procedure Sanitizing Procedure Following Cleaning Procedure Page Maintenance