Hoshizaki KML "F" SERIES User Manual download pdf (Page 87)

3. LOW ICE PRODUCTION

PROBLEM POSSIBLE CAUSE REMEDY

[1] Freeze cycle a) Float Switch 1. Leads short-circuit or 1. Check and replace.

time is too defective switch.

long. 2. Float does not move freely. 2. Clean or replace.

b) Water Solenoid 1. Diaphragm does not close. 1. Check for water leaks

Valve with icemaker off.

c) Controller Board 1. Defective. 1. See “II.2[e] CHECKING

CONTROLLER BOARD.”

[2] All ice formed a) Evaporator 1. Scaled up. 1. Clean.

on Evaporator b) Water Supply Line 1. Water pressure too low. 1. Check and get

does not fall recommended pressure.

into bin in c) Water Solenoid 1. Dirty mesh filter or orifice. 1. Clean.

harvest cycle. Valve 2. Diaphragm does not close. 2. Check for water leaks

with icemaker off.

d) Ambient and/or 1. Too cool. 1. Increase temperature.

water temperature

e) Thermistor 1. Out of position or loose 1. See “V. 11. REMOVAL

attachment. AND REPLACEMENT OF

THERMISTOR.”

f) Controller Board 1. Defrost Timer is set too 1. Adjust longer, referring

short. to “II. 2. [d] CONTROLS

AND ADJUSTMENT, 2)

Defrost Timer.”

2. Defective. 2. See “II. 2.[e] CHECKING

CONTROLLER BOARD.”

[3] Others a) Spray Tube 1. Clogged. 1. Clean.

2. Out of position. 2. Place in position.

b) Water System 1. Dirty. 1. Clean.

c) Refrigerant 1. Undercharged. 1. Check for leaks and

recharge.

d) Expansion Valve 1. Bulb out of position or 1. Place in position.

loose attachment.

2. Defective. 2. Replace.

e) Hot Gas Solenoid 1. Coil winding opened. 1. Replace.

Valve 2. Plunger does not move. 2. Replace.

3. Wiring to Hot Gas Valve. 3. Check for loose

connection or open, and

replace.

2. EVAPORATOR IS FROZEN UP

PROBLEM POSSIBLE CAUSE REMEDY

[1] Freeze cycle a) See chart 1 - [3], and check dirty Air Filter or Condenser, ambient or water

time is long. temperature, water pressure, Water Regulator or refrigerant charge.

b) See chart 2 - [1], and check Float Switch, Water Solenoid Valve or Controller

Board.

[2] Harvest cycle a) See chart 2 - [2], and check Controller Board, Thermistor, Evaporator, ambient

time is long and/or water temperature, water supply line, Water Solenoid Valve.

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Hoshizaki KML "F" SERIES User Manual Page 87

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