Service Diagnosis; No Ice Production - Hoshizaki KM-320MAH Service Manual

IV. Service Diagnosis
A. No Ice Production
Problem
[1] The icemaker will not
start.
Possible Cause
a)Power Supply
b)Fuse (Inside fused
disconnect, if any)
c) Control Switch
d)Bin Control Thermostat 1. Tripped with bin filled
e)High Pressure Control 1. Bad contacts.
f) Transformer
g)Wiring to Controller
Board
h)Thermistor
i) Hot Gas Solenoid Valve 1. Continues to open in
1. OFF position.
2. Loose connection.
3. Bad contacts.
4. Voltage too high.
1. Blown.
1. OFF position.
2. Bad contacts.
with ice.
2. Ambient temperature
too cool.
3. Set too warm.
4. Bulb out of position.
5. Bad contacts or leaks
in bulb.
1. Thermal fuse blown or
coil winding opened.
1. Loose connections or
open.
1. Leads short-circuit
or open and high
temperature safety
operates.
freeze cycle and high
temperature safety
operates.
28
Remedy
1. Move to ON position.
2. Tighten.
3. Check for continuity and
replace.
4. Check and get
recommended voltage.
1. Check for short circuit and
replace.
1. Move to ICE position.
2. Check for continuity and
replace.
1. Remove ice.
2. Increase ambient
temperature.
3. See "II.B.4. Controls
and Adjustments, f) Bin
Control."
4. Place in position.
5. Check for continuity and
replace.
1. Check for continuity and
replace.
1. Replace.
1. Check for continuity and
replace.
1. See "II.B.4. Controls and
Adjustments, a) Defrost
Control."
1. Check for power off in
freeze cycle and replace.