Freeze Up - Hoshizaki KM-1601SAH/3 Service Manual

2. Freeze Up

Defrost and clean the unit prior to diagnosing freeze up. See "VI.A. Cleaning and Sanitizing
Instructions."
Freeze Up - Possible Cause
1. Evaporator
2. Separators
3. Cube Guide
4. Inlet Water Valve
5. Spray Tubes and/or Spray
Guides
6. Refrigerant Charge
7. Ambient Temperature
8. Water Supply
9. Thermostatic Bin Control
See "IV.C. Bin Control Check."
10. Control Board
See "IV.B. Control Board Check."
11. Thermistor
See "IV.E. Thermistor Check."
12. Hot Gas Valve
13. Liquid Line Valve (if applicable)
14. Thermostatic Expansion Valve
(TXV)
15. Water Regulating Valve
(water-cooled model)
1. Evaporator
2. Separators
3. Spray Tubes and/or Spray
Guides
4. Refrigerant charge.
5. Check Valve
6. Control Board
See "IV.B. Control Board Check."
Harvest Cycle
a) Scaled up.
b) Damaged.
a) Out of position.
b) Damaged.
a) Out of position.
b) Damaged.
a) Water valve screen clogged.
b) Defective.
a) Dirty.
b) Out of position.
a) Low.
a) Too cool.
a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 3/8" nominal ID copper water tubing or equivalent.
a) Extension bracket not installed.
b) Bulb out of position.
c) Bad contacts.
a) Harvest timer set too short.
b) Defective.
a) Loose, disconnected, or defective.
a) Closed.
a) Open.
a) Defective.
a) Leaking by.
b) Defective.
Freeze Cycle
a) Scaled up.
b) Damaged.
a) Out of position.
b) Damaged.
a) Dirty.
b) Out of position.
a) Low.
a) Defective.
a) Freeze timer set incorrectly.
b) Defective.
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