Hoshizaki KM-901MAH Service Manual page 67

Problem
[2] Cloudy or irregular
cubes.
5. Other
Problem
[1] Icemaker will not stop
when bin is filled with
ice.
[2] Abnormal noise.
[3] Ice in storage bin
often melts.
Possible Cause
a) Evaporator
b) Water System
c) Spray Guide
Possible Cause
a) Thermostatic Bin
Control
b) Mechanical Bin Control 1. Movement restricted.
c) Control Board ("G"
control board with
mechanical bin control)
a) Pump Motor
b) Fan Motor (except
water-cooled model)
c) Compressor
d) Refrigerant Lines
a) Drain Line(s)
b) Icemaker and Bin
c) Ice Cube Guide
1. Frozen up.
2. Scaled up.
3. Damaged.
1. Water supply line too
small; requires 3/8"
OD line dedicated per
machine.
2. Water filter clogged or
flow rate too small.
3. High hardness or
contains impurities.
1. Dirty.
1. Set too cold.
2. Defective.
2. Loose connection.
3. Defective
1. Defective.
1. Bearings worn out.
1. Bearings worn out.
2. Fan blade deformed.
3. Fan blade does not
move freely.
1. Bearings worn out or
cylinder valve broken.
2. Mounting pad out of
position.
1. Rub or touch other
lines or surfaces.
1. Plugged.
1. Drains not run
separately.
1. Out of position.
Circulated water falls
into bin.
67
Remedy
1. See chart 2.
2. Clean
3. Replace.
1. Increase water line size.
2. Replace filter or install a
higher flow rate filter.
3. Install a water softener or
filter.
1. Clean.
Remedy
1. See "IV.C.1. Thermostatic
Bin Control Check."
2. Replace.
1. Check and free.
2. Check and reconnect.
3. See "IV.C.2. Mechanical
Bin Control Check and
Cleaning."
1. See "IV.B. Control Board
Check."
1. Replace.
1. Replace.
2. Replace.
3. Replace.
1. Replace.
2. Reinstall.
1. Reposition.
1. Clean.
1. Separate the drain lines.
1. Place in position.