Low Ice Production - Hoshizaki KMD-450MAH Service Manual

Problem
[3]Other.

3. Low Ice Production

Problem
[1] Freeze cycle time is
long.
Possible Cause
a) Ice Cube Guide
b) Bin Control
Possible Cause
a) Inlet Water Valve
b) Float Switch
c) Thermistor
d) Evaporator
e) Spray Tubes
f) Pump Motor
g) Condenser (except
water-cooled model)
h) Refrigerant Charge
i) Hot Gas Valve
j) Expansion Valve
k) Compressor
l) Condenser Water
(water-cooled model)
m)Liquid Line Valve
n) Headmaster (C.P.R.)
(remote condenser
unit)
1. Out of position.
1. Movement restricted.
2. Defective.
1. Diaphragm does not
close.
1. Float does not move
freely or switch
defective.
1. Disconnected, loose,
or defective.
1. Scaled up.
2. Damaged.
1. Dirty.
2. Out of position.
1. RPM too slow.
1. Air filter or condenser
clogged.
1. Low charge.
1. Open.
1. Bulb loose.
2. Operating erratically.
1. Erratic or off.
1. Water regulating valve
set too high.
2. Condenser water
pressure too low.
3. Water temperature out
of specification.
1. Erratic, sticking.
1. Bypassing.
47
Remedy
1. Place in position.
1. Check and free.
2. See "IV.C. Bin Control
Check and Cleaning."
Remedy
1. Check for water leaks with
icemaker off.
1. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
1. Connect, secure, check.
See "V.J. Removal
and Replacement of
Thermistor" and "IV.E.
Thermistor Check."
1. Clean.
2. Replace.
1. Clean.
2. Place in position.
1. See chart 1.[5].
1. Clean.
1. Check for leaks. Recover,
repair, evacuate, and
recharge.
1. Check and replace.
1. Secure bulb.
2. Check and replace.
1. See chart 1.[3].
1. Adjust or replace. See
"V.I. Adjustment of
Water Regulating Valve
(water-cooled model)."
2. Check and get
recommended pressure.
3. Correct to specification.
1. Check and replace.
1. Replace.