Hoshizaki KM-320MAH Service Manual page 29

Problem
[2] Water continues to
be supplied, and the
icemaker will not
start.
[3] Compressor will
not start or stops
operating.
Possible Cause
j) Water Supply Line
k) Water Solenoid
l) Controller Board
m)Interlock Switch
(Cleaning Valve)
a)Float Switch
b)Controller Board
c) Contactor
a)Wash Switch
b)High Pressure
Controller
1. Water supply off and
water supply cycle
does not finish.
2. Condenser water
pressure too low
or off and pressure
control opens and
closes frequently to
finally operate high
temperature safety.
1. Mesh filter or orifice
gets clogged and
water supply cycle
does not finish.
2. Coil winding opened.
3. Wiring to water valve. 3. Check for loose
1. Defective.
1. OFF Position
2. Bad contacts.
1. Connector
disconnected.
2. Leads opened or
defective switch.
3. Float does not move
freely.
1. Defective.
1. Open coil or contacts
worn.
1. WASH position.
2. Bad contacts.
1. Dirty air filter or
condenser.
2. Ambient or condenser
water temperature too
warm.
3. Refrigerant
overcharged.
4. Condenser water
pressure too low or off.
(water-cooled model)
5. Fan not operating.
(except water-cooled
model)
6. Refrigerant line or
components plugged.
29
Remedy
1. Check and get
recommended pressure.
2. Check and get
recommended pressure.
1. Clean.
2. Replace.
connection or open, and
replace.
1. See "II.B.5. Checking the
Controller Board."
1. Move to ON position.
2. Check for continuity and
replace.
1. Place in position.
2. Check and replace.
3. Clean or replace.
1. Replace.
1. Replace.
1. Move to ICE position.
2. Check and replace.
1. Clean.
2. Reduce temperature.
3. Recharge.
4. Check and get
recommended pressure.
5. See chart A.[6]
6. Clean and replace drier.