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P24A & P34A Service Manual
Symptom: Low ice capacity (cont.)
Excessively high head pressure
Thawing gas solenoid valve (18) leaking
through during freeze cycle
Symptom: Poor ice quality
Excessive concentration of solids in the water
tank usually indicated by a build-up of mineral
deposit on the sides and bottom of the tank and
opaque ice production. Also, water distributors
restricted.
Insufficient water supply indicated by a low
level in the tank
Water pump rotation wrong direction
Low refrigerant charge, causing an ice out
problem and re-freeze
Restriction in liquid line, causing short freeze
cycle
12/17/12
Possible Cause
Possible Cause
Possible Remedy
Check cooling tower or evap condenser to
make sure sufficient water is provided for
cooling and the equipment is operational to
cool the water. Also see "Symptom High Head
Pressure".
Check the manual opening stem to make sure it
is in the automatic position (stem screwed in).
Check
for
leak
by sound,
difference and frost during a freeze cycle.
Close the stop valve (90) to confirm suspicion
of leakage. Repair or replace the valve.
Possible Remedy
Perform a cleaning procedure as well as
removing the freezer cover and cleaning the
water distributors.
Make sure the flushing
valve (63) is functioning and the tank overflow
piping is not restricted.
Check water pressure, 40 psig is recommended
minimum. Check for a water line restriction,
partially closed valve, or defective make-up
water float valve. Make sure the water tank
drain is closed.
Check rotation in relation with arrow on pump
housing and reverse two wires at the motor if
necessary.
Check refrigerant level mark on the receiver
and on the painted portion of the gage glass
guard. Be sure to keep the gage glass cocks
closed when finished checking the level.
Check for closed valve, defective solenoid
valve (20), float switch defective or strainer
restricted. The liquid line will normally have
frost on the down-stream side of a restriction,
especially as the suction pressure decreases.
8-7
TROUBLESHOOTING
temperature
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