Hoshizaki KM-1301SAH/3 Service Manual page 44

Freeze-Up - Possible Cause
10. Thermistor
See "II.F. Thermistor Check"
11. Thermostatic Expansion Valve
12. Hot Gas Valve
13. Liquid Line Valve
1. Evaporator
2. Spray Tubes and/or Spray
Guides
3. Refrigerant Charge
4. Control Board
See "II.C. Control Board Check"
5. Inlet Water Valve
6. Float Switch
See "II.E. Float Switch Check
and Cleaning"
7. Pump Motor
8. Thermostatic Expansion Valve
9. Liquid Line Valve
10. Headmaster (C.P.R.)
(remote models)
3. Low Ice Production
Low Ice Production - Possible Cause
1. Evaporator
2. Spray Tubes and/or Spray
Guides
3. Refrigerant Charge
4. Water Supply
5. Control Board
See "II.C. Control Board Check"
6. Thermistor
See "II.F. Thermistor Check"
7. Hot Gas Valve
8. Inlet Water Valve
a) Loose, disconnected, or defective.
a) Defective.
a) Closed or restricted.
a) Open.
Freeze Cycle
a) Scaled up.
b) Damaged.
a) Dirty.
b) Out of position.
a) Low.
a) Freeze timer (S4 dip switch 9 & 10) set incorrectly.
b) Defective.
a) Leaking by.
a) Float does not move freely.
b) Defective.
a) RPM too slow.
b) Impeller damaged.
a) Bulb loose or defective.
a) Restricted.
a) Not bypassing.
Long Harvest Cycle
a) Scaled up.
a) Dirty.
b) Out of position.
a) Low.
a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 3/8" Nominal ID (10 mm Nominal OD in the EU) water
tubing or equivalent.
d) Too cold.
a) Thermistor connection loose (K3).
b) Defective.
a) Loose, disconnected, or defective.
a) Erratic or closed.
a) Screen or orifice clogged.
44