Hoshizaki Serenity Series KMS-830MLH Service Manual page 41

Freeze-Up - Possible Cause
3. Spray Tubes and/or Spray
Guides
4. Water Supply
5. Inlet Water Valve
6. Float Switch
See "IV.D. Float Switch Check
and Cleaning"
7. Refrigerant Charge
8. Control Board
See "II.C.3. Controls and
Adjustments" and "IV.B. Control
Board Check"
9. Bin Control
See "IV.C. Bin Control Check and
Cleaning"
10. Thermistor
See "IV.E. Thermistor Check"
11. Thermostatic Expansion Valve
(TXV)
12. Hot Gas Valves (KMS & SRK)
13. Liquid Line Valves (KMS & SRK) a) Open.
14. X11/X10 Relays
1. Evaporator
2. Spray Tubes and/or Spray
Guides
3. Refrigerant Charge
4. Control Board
See "IV.B. Control Board Check"
5. Inlet Water Valve
6. Float Switch
See "IV.D. Float Switch Check
and Cleaning"
7. Pump Motor
8. Thermostatic Expansion Valve
(TXV)
9. Headmaster (C.P.R.)
a) Dirty.
b) Out of position.
a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 1/4" nominal ID copper water tubing or equivalent.
a) Screen or orifice clogged.
b) Defective.
a) Dirty, sticking.
b) Defective.
a) Low.
a) Harvest timer (S4 dip switch 1 & 2) set too short.
b) Harvest pump timer (S4 dip switch 7) not in factory default position.
c) Defective.
a) Actuator does not move freely.
a) Loose, disconnected, or defective.
a) Defective.
a) Closed or restricted.
a) Bad contacts. Open coil. Not allowing pump motor operation during
last 50 seconds of harvest.
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) Defective.
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