Hoshizaki KM-901MAH Service Manual page 61

Problem
[1] The icemaker will not
start. (continued)
[2] Fill cycle will not
terminate.
Possible Cause
h) Transformer
i) Wiring to Control Board 1. Loose connections or
j) Interlock Switch
(Cleaning Valve)
k) Mechanical Bin Control 1. Movement restricted.
l) Thermistor
m)Hot Gas Valve
n) Inlet Water Valve
o) Float Switch
p) Control Board
a) Water Supply
b) Float Switch
c) Control Board
1. Coil winding open or
shorted.
open.
1. Open position.
2. Bad contacts.
2. Defective
1. Leads shorted or open
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.
2. Coil winding open.
3. Wiring to inlet water
valve.
1. Bad contacts.
2. Defective switch.
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 switch.
1. Defective.
61
Remedy
1. Replace.
1. Check for continuity and
replace.
1. Move to closed position.
2. Check for continuity and
replace.
1. Check and free.
2. See "IV.C.2. Mechanical
Bin Control Check and
Cleaning."
1. See "IV.E. Thermistor
Check."
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."