Service Diagnosis Table - Hoshizaki IM-50BAA-LM Service Manual

C. Service Diagnosis Table
First see "III.G. Error Codes." If there are no recorded errors, refer to the table below.
No Ice Production - Possible Cause
1. Power Supply
2. Fuse (Control Box)
3. Control Switch
4. Control Board
5. Bin Control
See "II.D. Bin Control Check and
Cleaning"
6. Water Supply
7. Inlet Water Valve
8. Compressor
9. Hot Gas Valve
10. Evaporator (Cube Control)
Thermistor
See "II.E. Evaporator Thermistor
Check"
11. Pump Motor
12. Thermostatic Expansion Valve
13. Fan Motor
14. Water System
Low Ice Production - Possible Cause
1. Evaporator
2. Refrigerant Charge
3. Control Board
4. Evaporator (Cube Control)
Thermistor
See "II.E. Evaporator Thermistor
Check"
5. Hot Gas Valve
6. Compressor
a) Off, blown fuse, or tripped breaker.
b) Not within specifications.
a) Blown.
a) In "OFF" or "WASH" position.
b) Bad contacts.
a) Error. See "III.G. Error Codes."
b) 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 restricted.
a) Screen or orifice restricted.
b) Coil winding open.
a) Compressor relay/magnetic contactor contacts bad or coil winding
open.
b) Start capacitor or run capacitor defective (single phase).
c) Internal protector open.
d) Start relay contacts bad or coil winding open (single phase).
e) Defective.
a) Defective.
a) Loose, disconnected, or defective.
a) Defective.
a) Bulb loose.
b) Defective.
a) Defective.
a) Water leaks.
Long Harvest Cycle
a) Scaled up.
a) Low.
a) Thermistor connection loose (K3).
b) Defective.
a) Loose, disconnected, or defective.
a) Erratic or closed.
a) Inefficient or off.
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