Low Ice Production; Others - Hoshizaki FM-170AFE Service Manual

2. LOW ICE PRODUCTION

PROBLEM
[1] Low ice
production.

3. OTHERS

PROBLEM
[1] Abnormal
noise
CHECK
a) Refrigerant Line
b) High-side
Pressure Too
High
c) Expansion Valve
(not adjustable)
CHECK
a) Fan Motor
b) Compressor
c) Refrigerant Lines
d) Gear Motor
e) Evaporator
POSSIBLE CAUSE
1. Gas leaks.
2. Refrigerant line
clogged.
3. Overcharged.
1. Dirty Air Filter or
Condenser.
2. Ambient temperature
too warm.
3. Fan rotating too slow.
4. Bad ventilation.
1. Low-side pressure too
low.
2. Low-side pressure too
high.
POSSIBLE CAUSE
1. Bearing 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 lines or
other surfaces.
1. Bearing or Gear
wear/damage.
1. Too much pressure
loss.
2. Scale on inside wall of
Freezing Cylinder.
3. Water does not flow
from Reservoir into
Evaporator (air staying
in Evaporator).
27
REMEDY
1. See 1 - [5] - a).
2. Replace the clogged
component.
3. Recharge.
1. Clean.
2. Check for recommended
temperature.
3. See 3 - [1] - a).
4. Remove anything blocking
vents.
1. Replace.
2. See if Expansion Valve
Bulb is mounted properly,
and replace the valve if
necessary.
REMEDY
1. Replace.
2. Replace fan blade.
3. Replace.
1. Replace.
2. Reinstall.
1. Reset or secure pipes.
1. Replace.
1. Replace.
2. Remove Auger. Use a
solution of lime removing
cleaner to clean
periodically.
If water is found to surpass
the following levels, install
a conditioner.
Hardness 50 ppm
Silica 30 ppm
3. Straighten bent hose.