Hoshizaki KM-320MAH Service Manual page 32

Problem
[2]All ice formed on
evaporator does not
fall into bin in harvest
cycle.
[3]Other
Possible Cause
c) Controller Board
a) Evaporator
b) Water Supply Line
c) Water Filter System
d) Water Solenoid Valve
e) Ambient and/or water
temperature.
f) Line Valve
g) Thermistor
h) Controller Board
a) Spray Tubes
b) Water System
c) Refrigerant
d) Expansion Valve
e) Hot Gas Solenoid Valve 1. Coil winding opened.
f) Water Supply Line
g) Water Filter (if installed) 1. Flow rate too small.
1. Defective.
1. Scaled up.
1. Water pressure too
low.
1. Dirty/Restricted
1. Dirty mesh filter or
orifice.
2. Diaphragm does not
close.
1. Too cool.
1. Continues to open in
harvest cycle.
1. Out of position or
loose attachment.
1. Defrost timer is set
too short.
2. Defective.
1. Clogged.
2. Out of position.
1. Dirty.
1. Undercharged.
1. Bulb out of position or
loose attachment.
2. Defective.
2. Plunger does not
move.
3. Wiring to hot gas
valve.
1. Too small; requires
3/8" OD line dedicated
per machine.
32
Remedy
1. See "II.B.5. Checking the
Controller Board."
1. Clean.
1. Check and get
recommended pressure.
1. Replace filter.
1. Clean.
2. Check for water leaks with
icemaker off.
1. Increase temperature.
1. Check operation in harvest
cycle and replace.
1. See "V.H. Removal
and Replacement of
Thermistor."
1. Adjust longer, referring
to "II.B.4. Controls and
Adjustments, b) Defrost
Timer.
2. See "II.B.5. Checking the
Controller Board."
1. Clean
2. Place in position.
1. Clean.
1. Check for leaks and
recharge.
1. Place in position.
2. Replace.
1. Replace.
2. Replace.
3. Check for loose
connection or open, and
replace.
1. Increase water line size.
1. Replace with filter that has
larger flow rate.