Diagnostic Tables - Hoshizaki KML-325MWJ Service Manual

H. Diagnostic Tables
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply
2. Thermostatic Bin Control
See "II.D. Bin Control Check"
3. Fuse (Control Box)
4. Control Switch
5. High-Pressure Switch
6. Control Transformer
(115VAC/10.5VAC)
7. Control Board
See "II.C. Control Board Check"
8. Water Supply
9. Inlet Water Valve
10. Float Switch
See "II.E. Float Switch Check
and Cleaning"
11. Compressor
12. Hot Gas Valve
13. Thermistor
See "II.F. Thermistor Check"
14. Pump Motor
15. Thermostatic Expansion Valve
a) Off, blown fuse, or tripped breaker.
b) Not within specifications.
a) Engaged with bin filled with ice.
b) Ambient temperature too cool.
c) Set too warm.
d) Bulb out of position.
e) Open contacts, defective.
a) Blown.
a) In "OFF" or "SERVICE" position.
b) Bad contacts.
a) Dirty condenser.
b) Fan motor not operating.
c) Refrigerant overcharged.
d) Bad contacts.
e) Refrigerant lines or components plugged.
a) Coil winding open or shorted.
a) In alarm.
b) Yellow "BC OPEN" LED on:
Jumper loose or missing on models with TBC.
c) Defective.
a) Water supply off or improper water pressure.
b) External water filters clogged.
a) Screen or orifice clogged.
b) Coil winding open.
c) Water valve open in freeze cycle.
a) Float does not move freely.
b) Defective.
a) Compressor relay contacts bad or coil winding open.
b) Start capacitor or run capacitor defective.
c) Internal protector open.
d) Start relay contacts bad or coil winding open (single phase).
e) Compressor defective.
a) Closed in harvest cycle.
b) Open in freeze cycle.
a) Loose, disconnected, or defective.
a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
a) Bulb loose.
b) Operating erratically.
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