Low Ice Production; Others - Hoshizaki FM-150KE(-N) Service Manual

2. LOW ICE PRODUCTION

PROBLEM
[1] Low ice
production

3. OTHERS

PROBLEM
[1] Abnormal noise
POSSIBLE CAUSE
a) Refrigerant line
b) High-side
pressure too high
c) Expansion valve
(not adjustable)
d) Evaporator
POSSIBLE CAUSE
a) Fan motor
(condenser unit)
b) Compressor
c) Refrigerant lines
d) Gear motor (ice
making)
e) Evaporator
f) Heater
g) CPR (condenser
unit)
1. Gas leaks.
2. Refrigerant line
clogged.
3. Overcharged.
1. Dirty air filter or
condenser.
2. Ambient or condenser
water temperature too
warm.
3. Condenser water
pressure too low or
off.
4. Fan rotating too slow.
5. Water regulating
valve clogged.
6. Bad ventilation.
7. Less than specified
clearance at rear,
sides and top.
1. Low-side pressure
exceeding the limit.
1. Evaporator pipe
crushed.
1. Bearing worn out.
2. Fan blade deformed.
3. Fan blade does not
move freely.
1. Bearings worn out, or
cylinder valve
defective.
2. Mounting pad out of
position.
1. Rub or touch lines or
other surfaces.
1. Bearing or gear
wear/damage.
1. Low-side pressure too
low.
2. Scale on inside wall of
freezing cylinder.
1. Defective.
1. Internal leaks.
45
REMEDY
1. See 1 - [5] - a).
2. Replace the clogged
component.
3. Recharge.
1. Clean.
2. Check for recommended
temperature.
3. Check and get recommended
pressure.
4. Replace.
5. Clean.
6. Remove anything blocking
vents.
7. Allow proper clearance for
ventilation.
1. Replace.
1. Replace.
REMEDY
1. Replace.
2. Replace fan blade.
3. Replace.
1. Replace.
2. Reinstall.
1. Replace.
1. Replace.
1. See if expansion valve bulb is
mounted properly, and replace
the valve if necessary.
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
1. Replace.
1. Replace.