Table of Contents
Advertisement
P24A & P34A Service Manual
Symptom: Machine short cycles
Freezer pressure switch (2PS) set too low or
defective
Freeze-up
Clogged water distributors
Lack of water for making ice
Lack of sufficient liquid refrigerant feed
Water pump rotation incorrect or pump
defective
Symptom: Shut down by oil pressure switch
Switch adjusted too high or defective
Oil pressure low
Low oil level
Defective thawing timer causing long harvest
cycle and oil dilution
Symptom: High compressor discharge temperature
High head pressure
Defective suction or discharge valves
Restriction in the discharge gas line
Internal relief valve leaking
12/17/12
Possible Cause
Possible Cause
Possible Cause
Possible Remedy
Adjust switch or replace if defective.
FIGURE 9-1.
See "Freeze-up due to extended freezer period"
and "Freeze-up due to ice failing to discharge".
Clean water distributors.
Check water tank for sufficient water level.
Check for restriction in water line, defective
float valve, open drain valve, excessive ice
chips or low water pressure and correct.
Check float and float switch, solenoid valve
and coil #20 in liquid line, strainer, and
refrigerant level in receiver.
Check pump motor rotation. Check for leaking
pump seal or defective motor and repair or
replace as needed.
Possible Remedy
Check switch adjustment and cutout pressure
activation against an accurate gage. Replace
switch if defective. See Figure 9-4.
See "Compressor oil pressure low".
Add oil.
Replace defective timer.
Possible Remedy
Check gage accuracy and "High discharge
pressure".
Feel the compressor heads for hot spots or one
head running hot. Replace worn or leaking
valves.
Check all hand and check valves to make sure
they are fully opened and not stuck. Repair or
replace as needed.
Check the compressor manual to see if your
compressor
is
so
accordingly.
TROUBLESHOOTING
See
equipped.
Replace
8-11
Advertisement
Table of Contents
