Hoshizaki 1800ALKE(-N), Service Manual

Page: 135 / 148

131
2. LOW ICE PRODUCTION
PROBLEM POSSIBLE CAUSE REMEDY
[1] Low ice
production
a) Refrigerant line 1. Gas leaks. 1. See 1 - [5] - a).
2. Refrigerant line
clogged.
2. Replace the clogged
component.
3. Overcharged. 3. Recharge.
b) High-side
pressure too high
1. Dirty air filter or
condenser.
1. Clean.
2. Ambient or condenser
water temperature too
warm.
2. Check for recommended
temperature.
3. Condenser water
pressure too low or
off.
3. Check and get recommended
pressure.
4. Fan rotating too slow. 4. Replace.
5. Water regulating
valve clogged.
5. Clean.
6. Bad ventilation. 6. Remove anything blocking
vents.
7. Less than specified
clearance at rear,
sides and top.
7. Allow proper clearance for
ventilation.
c) Expansion valve
(not adjustable)
1. Low-side pressure
exceeding the limit.
1. Replace.
d) Evaporator 1. Evaporator pipe
crushed.
1. Replace.
3. OTHERS
PROBLEM POSSIBLE CAUSE REMEDY
[1] Abnormal noise a) Fan motor
(condenser unit)
1. Bearing worn out. 1. Replace.
2. Fan blade deformed. 2. Replace fan blade.
3. Fan blade does not
move freely.
3. Replace.
b) Compressor 1. Bearings worn out, or
cylinder valve
defective.
1. Replace.
2. Mounting pad out of
position.
2. Reinstall.
c) Refrigerant lines 1. Rub or touch lines or
other surfaces.
1. Replace.
d) Gear motor (ice
making)
1. Bearing or gear
wear/damage.
1. Replace.
e) Evaporator 1. Low-side pressure too
low.
1. See if expansion valve bulb is
mounted properly, and replace
the valve if necessary.
2. Scale on inside wall of
freezing cylinder.
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
f) Heater 1. Defective. 1. Replace.
g) CPR (condenser
unit)
1. Internal leaks. 1. Replace.