Diagnostic Tables - Hoshizaki KM-301BAJ Service Manual

H. Diagnostic Tables
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply
2. Fuse (Control Box)
3. Control Switch
4. High-Pressure Switch
5. Control Transformer
(115VAC/10.5VAC)
6. Control Board
See "II.C. Control Board Check"
7. Bin Control
See "II.D. Bin Control 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
a) Off, blown fuse, or tripped breaker.
b) Unplugged or loose connection.
b) Not within specifications.
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.
f) HGV defective.
a) Coil winding open or shorted.
a) In alarm.
b) CB "POWER OK" LED flashing (bin full).
c) Defective.
a) Tripped with bin filled with ice.
b) Actuator does not move freely.
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 defective.
c) External protector open.
d) Start relay contacts bad or coil winding open.
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.
d) Mechanical seal worn out.
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