Hoshizaki KMD-450MAH Service Manual page 43

Problem
[1] The icemaker will not
start. (continued)
[2] Fill cycle will not
terminate.
[3] Compressor will
not start or stops
operating.
Possible Cause
j) Hot Gas Valve
k) Inlet Water Valve
l) Float Switch
m)Control Board
a) Water Supply
b) Float Switch
c) Control Board
a) Magnetic Contactor
b) Start Capacitor or Run
Capacitor
c) Internal Overload
Protector Open (check
1 through 3 to the right
and d through f below)
d) Starter
e) Compressor
f) Control Board
1. Continues to open
in freeze cycle and
freeze timer safety
operates (3 beep
alarm).
1. Mesh filter or orifice
gets clogged and
water supply cycle
does not finish.
2. Coil winding open.
3. Wiring to inlet water
valve.
1. Bad contacts.
2. Float does not move
freely or switch
defective.
1. Defective or in alarm. 1. See "IV.B. Control Board
1. Water supply off or
pressure too low.
1. Connector
disconnected.
2. Float does not move
freely or switch
defective.
1. Defective.
1. Bad contacts.
2. Coil winding open.
1. Defective.
1. Loose terminal.
2. Voltage.
3. Dirty condenser.
1. Bad contacts.
2. Coil winding open.
1. Power supply not
within specifications.
2. Wiring to compressor. 2. Check for loose
3. Defective.
4. Protector tripped.
1. No power to contactor. 1. See "IV.B. Control Board
43
Remedy
1. Check for hot gas valve
stuck open and replace.
1. Clean.
2. Replace.
3. Check for loose
connection or open, and
replace.
1. Check for continuity and
replace.
2. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
Check."
1. Check and get
recommended pressure.
1. Reconnect.
2. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
1. See "IV.B. Control Board
Check."
1. Check for continuity and
replace.
2. Replace.
1. Replace.
1. Tighten or replace.
2. Check and correct.
3. Clean.
1. Check and replace.
2. Replace.
1. Refer to nameplate and
correct.
connection or open, and
replace.
3. Replace.
4. Reduce temperature.
Check."