Diagnostic Tables; No Ice Production - Hoshizaki KM-230BAJ Service Manual

G. Diagnostic Tables

1. No Ice Production

PROBLEM
[1] The icemaker a) Power Supply
will not start.
b) Fuse (inside fused
c) Control Switch
d) Bin Control Switch
e) High Pressure
f) Transformer
g) Wiring to Control
h) Thermistor
i) Hot Gas Solenoid
j) Water Supply Line
k) Inlet Water Valve
l) Control Board
POSSIBLE CAUSE
1. OFF position.
2. Loose connections.
3. Bad contacts.
4. Voltage too high.
5. Unplugged.
1. Blown.
disconnect, if any)
1. OFF or SERVICE position.
2. Bad contacts.
1. Tripped with bin filled with
2. Defective reed switch.
1. Bad contacts.
Control
1. Thermal fuse blown or coil
1. Loose connections or open.
Board
1. Leads shorted or open and
1. Continues to open in freeze
Valve
1. Water supply off and water
2. Condenser water pressure
1. Mesh filter or orifice gets
2. Coil winding open.
3. Wiring to water valve.
1. Defective.
ice.
winding open.
high temperature safety
operates. If open, unit will
start but have long harvest
cycle.
cycle and high temperature
safety operates.
supply cycle does not finish.
too low or off and high
pressure control opens and
closes frequently
(water-cooled model).
clogged and water supply
cycle does not finish.
24
REMEDY
1. Move to ON position.
2. Tighten.
3. Check for continuity and
replace.
4. Check and get
recommended voltage.
5. Plug in.
1. Check for short circuit
and replace.
1. Move to ICE position.
2. Check for continuity and
replace.
1. Remove ice.
2. Check for continuity and
replace.
1. Check for continuity and
replace.
1. Replace.
1. Check for continuity and
replace.
1. See "II.F. Thermistor
Check".
1. Check for power off in
freeze cycle and replace.
1. Check and get
recommended pressure.
Check for water supply.
2. Check and get
recommended pressure.
1. Clean. Replace if
necessary.
2. Replace.
3. Check for loose
connection or open, and
replace.
1. See "II.C. Control Board
Check".