Low Ice Production - Hoshizaki RELIABILITY IS A BEAUTIFUL THING DCM-270BAH-OS Service Manual

2. Low Ice Production

PROBLEM
[1] Abnormal refrigeration
circuit.
[2] Condensing
temperature too high.
[3] Poor water flow.
POSSIBLE CAUSE
a) Condenser
b) Thermostatic Expansion
Valve
c) Refrigerant Lines
d) Compressor Motor
Protector
e) Inside Wall of Evaporator 1. Scale on inside wall of
a) Condenser
b) Fan Motor
a) Water Supply
1. Dirty air filter or
condenser.
2. Bad ventilation.
1. Low-side pressure or
temperature exceeding
the limit.
1. Gas leaks.
2. Overcharged.
1. Overload protector
stops compressor
intermittently.
freezing cylinder.
1. Dirty air filter or
condenser.
2. Bad ventilation.
3. Ambient temperature
too high.
4. Less than 6" clearance
at rear, sides and top.
1. Fan revolving too
slowly.
1. Water pressure too low. 1. See chart 1,[6], a)
22
REMEDY
1. Clean.
2. Remove anything blocking
vents.
1. Secure bulb to low-side line
or replace.
1. Check for leaks with a leak
detector. Reweld leak,
replace drier and charge
with refrigerant. The amount
of refrigerant is marked on
the nameplate.
2. Recharge.
1. Check condenser and fan
motor.
1. Remove auger, use
Hoshizaki "Scale Away" or
"LIME-A-WAY" solution to
clean periodically.
If water is found to exceed
the following levels, install a
conditioner:
Hardness 50 ppm
Silica 30 ppm
1. Clean.
2. Remove anything blocking
vents.
3. Check ventilation and
location, and change as
needed.
4. Allow proper clearance for
ventilation.
1. See chart 1,[5], a)