Hoshizaki KM-151BAH - Manual (Page 37)

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PROBLEM POSSIBLE CAUSE REMEDY
1. Connector
disconnected.
1. Reconnect.
2. Leads opened or
defective switch.
2. Check and replace.
a) Float Switch
3. Float does not move
freely.
3. Clean or replace.
[2] Water
continues to
be supplied,
and the
icemaker will
not start.
b) Control Board 1. Defective. 1. Replace.
1. WASH position. 1. Move to ICE position. a) Control Switch
2. Bad contacts. 2. Check and replace.
1. Dirty Air Filter or
Condenser.
1. Clean.
2. Ambient temperature
too warm.
2. Reduce ambient
temperature.
3. Refrigerant
overcharged.
3. Recharge.
4. Fan not operating. 4. See chart 2 - [6].
b) High Pressure
Control (KM-151
only)
5. Refrigerant line or
components plugged.
5. Clean and replace Drier.
1. Bad contacts. 1. Check for continuity and
replace.
2. Voltage too low. 2. Increase voltage.
c) Overload
Protector
3. Refrigerant overcharged
or undercharged.
3. Recharge.
1. Bad contacts. 1. Check and replace. d) Starter
2. Coil winding opened. 2. Replace.
e) Start Capacitor 1. Defective. 1. Replace.
1. Bad contacts. 1. Check for continuity and
replace.
f) Power Relay
2. Coil winding opened. 2. Replace.
1. Wiring to Compressor. 1. Check for loose
connection or open, and
replace.
2. Defective. 2. Replace.
g) Compressor
3. Protector tripped. 3. Reduce temperature and
verify cause.
h) Control Board 1. Defective. 1. See “II. 3. [d] CONTROL
BOARD CHECK
PROCEDURE”.
[3] Compressor
will not start or
operates
intermittently.
i) Condenser, Air
Filter
1. Clogged with dirt and
dust.
1. Clean and unclog.
a) Inlet Water Valve 1. Diaphragm does not
close.
1. Check for water leaks
with icemaker off.
Replace if necessary.
[4] Water
continues to
be supplied in
freeze cycle.
b) Control Board 1. Defective. 1. See “II. 3. [d] CONTROL
BOARD CHECK
PROCEDURE”.