Hoshizaki KM-320MAH - Manual (Page 32)

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