Hoshizaki KM-901MWH - Manual (Page 65)

65
Problem Possible Cause Remedy
[2]All ice formed on
evaporator does not
fall into bin in harvest
cycle. (continued)
l) Refrigerant 1. Low charge. 1. Check for leaks. Recover,
repair, evacuate, and
recharge.
m)Water Regulating Valve
(water-cooled model)
1. Leaking by in harvest. 1. Check and replace.
[3]Other. a) Ice Cube Guide 1. Out of position. 1. Place in position.
b) Thermostatic Bin
Control
1. Bulb out of position. 1. Place in position.
2. Bad contacts. 2. Check for continuity and
replace. See "IV.C.1.
Thermostatic Bin Control
Check."
c) Mechanical Bin Control 1. Movement restricted. 1. Check and free.
2. Defective. 2. See "IV.C.2. Mechanical
Bin Control Check and
Cleaning."
3. Low Ice Production
Problem Possible Cause Remedy
[1] Freeze cycle time is
long.
a) Inlet Water Valve 1. Diaphragm does not
close.
1. Check for water leaks with
icemaker off.
b) Float Switch 1. Float switch does not
move freely or switch
defective.
1. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
c) Evaporator 1. Scaled up. 1. Clean.
2. Damaged. 2. Replace.
d) Spray Tubes 1. Dirty. 1. Clean.
2. Out of position. 2. Place in position.
e) Pump Motor 1. RPM too slow. 1. See chart 1.[5].
f) Condenser (except
water-cooled model)
1. Air filter or condenser
clogged.
1. Clean.
g) Refrigerant Charge 1. Low charge. 1. Check for leaks. Recover,
repair, evacuate, and
recharge.
h) Hot Gas Valve 1. Open. 1. Check and replace.
i) Expansion Valve 1. Bulb loose. 1. Secure bulb.
2. Operating erratically. 2. Check and replace.
j) Compressor 1. Erratic or off. 1. See chart 1.[3].
k) Condenser Water
(water-cooled model)
1. Water regulating valve
set too high.
1. Adjust or replace. See
"V.J. Adjustment of Water
Regulating Valve."
2. Condenser water
pressure too low.
2. Check and get
recommended pressure.
3. Water temperature out
of specification.
3. Correct to specification.
l) Liquid Line Valve 1. Erratic, sticking. 1. Check and replace.
m)Headmaster (C.P.R.)
(remote condenser
unit)
1. Bypassing. 1. Replace.