10TA Service Manual
TROUBLESHOOTING
4/23/14
8-7
SYMPTOM:
Low ice capacity.
POSSIBLE CAUSE
POSSIBLE REMEDY
Low refrigerant charge. Check for and repair leaks, and add refrigerant.
Restriction in liquid line. Check for a partially closed valve, or an
obstruction at the drier, strainer, solenoid valve,
or expansion valve. The liquid line will
normally have frost on the downstream side of a
restriction, especially as the suction pressure
decreases.
Float switch stuck or failed in open position Make sure the float switch is opening and
closing. Make sure the “A1” valve is getting
power.
Thawing gas solenoid valve (18) leaking
through during the freeze cycle.
Check the manual opening stem to make sure it
is in the automatic position (stem screwed out).
Check for leakage through the valve by sound
and temperature difference. Close the stop
valve (90) at the receiver to confirm suspicion
of leakage. Repair or replace the valve as
needed.
Water distributors at top of freezer may be
stopped up.
Remove freezer cover and clean the distributors.
See Water Distributors, Section 7.
Inadequate water for ice making. Check water pressure (30 PSIG minimum
recommended). Check for a water restriction in
the supply line or at the make-up water float
valve.
Make-up water float valve (12) stuck open,
adjusted too high, or water tank drain valve
(15) open or leaking
Repair, replace or adjust float valve, or close,
repair, or replace water tank drain valve.
Controls for regulating freezing and thawing
cycles not adjusted properly.
For highest capacity, cylinder ice should have a
small hole and crushed ice should be about
3/16" thick. Check the freezer pressure switch
and thaw timer for proper adjustment, Section 9.
Excessively high head pressure. Check water regulating valve or fan control
adjustment. Check to make sure the WC or AC
condenser is clean. Check refrigerant tables for
pressure/temperature relation.
Warm make-up water for ice making. Capacity of the machine is proportional to ice
making water temperature. Warmer water will
reduce the ice making capacity. See Section 11,
Capacity Table.
Drain valve (12) open. Close drain valve (12).
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