Hoshizaki KM-320MAH - Manual (Page 28)

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