Hoshizaki KM-40B, Service Manual

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38
2. NO ICE PRODUCTION
PROBLEM POSSIBLE CAUSE REMEDY
[1] The icemaker
will not start.
a) Power Supply 1. OFF position. 1. Move to ON position.
2. Loose connections. 2. Tighten.
3. Bad contacts. 3. Check for continuity and
replace.
4. Voltage too high. 4. Check and get
recommended voltage.
5. Unplugged. 5. Plug in.
b) Fuse (inside
fused disconnect,
if any)
1. Blown out. 1. Check for short circuit
and replace.
c) Control Switch 1. OFF position. 1. Move to ICE position.
2. Bad contacts. 2. Check for continuity and
replace.
d) Bin Control
Switch
1. Tripped with bin filled
with ice.
1. Remove ice.
2. Defective reed switch. 2. Check for continuity and
replace.
e) High Pressure
Control
(KM-80B only)
1. Bad contacts. 1. Check for continuity and
replace.
f) Transformer 1. Thermal fuse blown out
or coil winding opened.
1. Replace.
g) Wiring to Control
Board
1. Loose connections or
open.
1. Check for continuity and
replace.
h) Thermistor 1. Leads shorted or open
and High Temperature
Safety operates. If
open, unit will start but
have long defrost cycle.
1. See “II. 4.
THERMISTOR”.
i) Hot Gas Solenoid
Valve
1. Continues to open in
freeze cycle and High
Temperature Safety
operates.
1. Check for power off in
freeze cycle and replace.
j) Water Supply Line 1. Water supply off and
water supply cycle does
not finish.
1. Check and get
recommended pressure.
Check for water supply.
k) Inlet Water Valve 1. Mesh filter or orifice
gets clogged and water
supply cycle does not
finish.
1. Clean. Replace if
necessary.
2. Coil winding opened. 2. Replace.
3. Wiring to Water Valve. 3. Check for loose
connection or open, and
replace.
l) Control Board 1. Defective. 1. See “II. 3. [d] CONTROL
BOARD CHECK
PROCEDURE”.