Hoshizaki KM-2400SRF3, KM-2400SRH3 service manual Controller Board

Page 28

PROBLEM

POSSIBLE CAUSE

 

REMEDY

 

l) Controller Board

1.

Defective.

1.

See “II.2[e] CHECKING

 

 

 

 

 

CONTROLLER BOARD.”

 

m) Interlock Switch

1.

“OFF” position.

1.

Move to “ON” position.

 

 

(Cleaning Valve)

2.

Bad contacts.

2.

Check for continuity and

 

 

 

 

 

 

replace.

[2] Water

a) Float switch

1.

Connector disconnected.

1.

Place in position.

continues to

 

2.

Leads opened or defective

2.

Check and replace.

be supplied,

 

 

switch.

 

 

 

 

and the ice-

 

3.

Float does not move freely.

3.

Clean or replace.

 

maker will not

b) Controller Board

1.

Defective.

1.

Replace.

 

start.

 

 

 

 

 

 

 

[3] Compressor

a) Wash Switch

1.

“WASH” position.

1.

Move to “ICE” position.

 

will not start

 

2.

Bad contacts.

2.

Check and replace.

or stops

b) High Pressure

1. Dirty Condenser.

1. Clean.

 

operating

Controller

 

 

 

 

 

 

 

 

2. Ambient or condenser

2. Reduce ambient temp.

 

 

 

water temp. too warm.

 

 

 

 

 

 

3. Refrigerant overcharged.

3.

Recharge.

 

 

 

4. Condenser water pressure

4.

Check and get

 

 

 

too low or off.

 

recommended pressure.

 

 

 

 

 

 

 

 

5. Fan not operating.

5.

See chart 1 - [6].

 

 

 

 

 

 

 

 

 

6.

Refrigerant line or

6.

Clean and replace Drier.

 

 

 

components plugged.

 

 

 

 

 

c) Overload Protector

1. Bad contacts.

1.

Check for continuity and

 

 

 

 

 

replace.

 

 

2.

Voltage too low.

2.

Increase voltage.

 

 

3.

Refrigerant overcharged or

3. Recharge.

 

 

 

undercharged.

 

 

 

 

 

 

4.

Line Valve continues to

4.

Check Line Valve's

 

 

 

close in freeze cycle and

 

operation in freeze cycle

 

 

 

Overload Protector

 

and replace.

 

 

 

operates.

 

 

 

 

 

d) Magnetic Contactor

1. Bad contacts.

1.

Check for continuity and

 

 

 

 

 

replace.

 

 

2.

Coil winding opened.

2.

Replace.

 

e) Compressor

1. Wiring to Compressor.

1. Check for loose

 

 

 

 

 

connection or open, and

 

 

 

 

 

replace.

 

 

2.

Defective.

2.

Replace.

 

 

3.

Protector tripped.

3.

Reduce temperature.

 

f) Controller board

1. Defective.

1.

See “II.2. [e] CHECKING

 

 

 

 

 

CONTROLLER BOARD.”

[4] Water

a) Water Solenoid

1.

Diaphragm does not close.

1.

Check for water leaks

continues to

Valve

 

 

 

with icemaker off.

be supplied in

b) Controller Board

1.

Defective.

1.

See “II.2.[e] CHECKING

freeze cycle.

 

 

 

 

CONTROLLER BOARD.”

28

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Contents Stackable Crescent Cuber Hoshizaki AMERICA, INC Contents Maintenance Specifications Condensing UNIT, URC-24F Specifications Model URC-24F II. General Information Construction Features of Control Products E Controller Board Controller BoardSOLID-STATE Control Controller BoardPage Beep every 3 sec. = High Evaporator Temperature 127 F Minute Fill CycleHarvest Cycle Freeze CycleControl Products HOSHIZAKI001 Board Control Products HOS-001A Board Sequence 1st Cycle 2nd Cycle and after with pump drain Important Water Valve opening is limited to 6 minutes2nd Cycle and after with no pump drain Controls and Adjustments OFFSetting Time Setting Frequency Checking the Controller Board Page III. Technical Information Wiring Diagram Timing Chart Page Performance Data IV. Service Diagnosis No ICE Production Problem Possible Cause RemedyController Board Problem Possible Cause Remedy Evaporator is Frozen UP ThermistorAbnormal ICE LOW ICE ProductionOthers Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Evacuation and Recharge R-404ABrazing 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 Removal and Replacement of Thermistor Caution Removal and Replacement of FAN Motor Removal and Replacement of Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes VI. Cleaning and Maintenance Instructions Important Preparing the Icemaker for Long StoragePage Cleaning Procedure Cleaning Procedure Page Sanitizing Procedure Following Cleaning Procedure Maintenance