Hoshizaki KMD-850MAH Service Manual page 38

Problem
[1] The icemaker will not
start. (continued)
Possible Cause
d) Control Switch
e) Bin Control
f) High Pressure Control
g) Transformer
h) Wiring to Control Board 1. Loose connections or
i) Interlock Switch
(Cleaning Valve)
j) Thermistor
k) Hot Gas Valve
l) Inlet Water Valve
1. "OFF" or "WASH"
position.
2. Bad contacts.
1. Tripped with bin filled
with ice.
2. Defective.
1. Bad contacts.
2. Dirty air filter or
condenser.
3. Ambient or condenser
water temperature too
warm.
4. Refrigerant
overcharged.
5. Fan not operating.
(except water-cooled
model)
6. Refrigerant line or
components plugged.
7. Condenser water
pressure too low or
off. (water-cooled
model only)
1. Coil winding opened
or shorted.
open.
1. Open position.
2. Bad contacts.
1. Leads shorted or
opened and high
temperature or harvest
backup timer safety
operates. (1 beep or 2
beep alarm)
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.
38
Remedy
1. Move to "ICE" position.
2. Check for continuity and
replace.
1. Remove ice.
2. See "II.F.2. Bin Control
Check Procedure."
1. Check for continuity and
replace.
2. Clean.
3. Reduce temperature.
4. Recharge.
5. See chart 1.[7].
6. Clean and replace drier.
7. Check and get
recommended pressure.
1. Replace.
1. Check for continuity and
replace.
1. Move to closed position.
2. Check for continuity and
replace.
1. See "II.D. Harvest Control
– Thermistor."
1. Check for hot gas valve
stuck open and replace.
1. Clean.