Hoshizaki KMD-450MAH Service Manual page 46

Problem
[2]All ice formed on
evaporator does not
fall into bin in harvest
cycle. (continued)
Possible Cause
e) Inlet Water Valve
f) Spray Tubes
g) Thermistor
h) Hot Gas Valve
i) Expansion Valve
j) Liquid Line Valve
(if applicable)
k) Control Board
l) Refrigerant
m)Water Regulating Valve
(water-cooled model)
1. Dirty mesh filter or
orifice.
2. Diaphragm does not
close.
1. Dirty.
2. Out of position.
1. Disconnected, loose,
or defective.
1. Coil winding open.
2. Plunger does not
move.
3. Wiring to hot gas
valve.
1. Open.
2. Bulb loose.
1. Continues to open in
harvest cycle.
1. Harvest timer is set
too short.
2. Defective.
1. Low charge.
1. Leaking by in harvest. 1. Check and replace.
46
Remedy
1. Clean.
2. Check for water leaks with
icemaker off.
1. Clean.
2. Place in position.
1. Connect, secure, check.
See "V.J. Removal
and Replacement of
Thermistor" and "IV.E.
Thermistor Check."
1. Replace.
2. Replace.
3. Check for loose or open
connection. Reconnect or
replace.
1. Check and replace.
2. Secure bulb.
1. Check operation in harvest
cycle and replace.
1. Adjust longer, referring to
"II.C.3.b) Harvest Timer
(S1 dip switch 1 & 2)."
2. See "IV.B. Control Board
Check."
1. Check for leaks. Recover,
repair, evacuate, and
recharge.