Vogt P-34AL-15, Service Manual

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P34AL-15 & P34ALOF-15 Service Manual
TROUBLESHOOTING
9/22/05
8-11
Symptom: Machine short cycles ( using freeze pressure switch (2PS) only)
Possible Cause Possible Remedy
Freezer pressure switch (2PS) set too low or
defective Adjust switch or replace if defective. See
FIGURE 9-3.
Freeze-up See “Freeze-up due to extended freezer period”
and “Freeze-up due to ice failing to discharge”.
Clogged water distributors Clean water distributors.
Lack of water for making ice 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.
Lack of sufficient liquid refrigerant feed Check float and float switch, solenoid valve
and coil #20 in liquid line, strainer, and
refrigerant level in receiver.
Water pump rotation incorrect or pump
defective Check pump motor rotation. Check for leaking
pump seal or defective motor and repair or
replace as needed.
Symptom: High compressor discharge temperature
Possible Cause Possible Remedy
High head pressure Check gage accuracy and “High discharge
pressure”.
Defective suction or discharge valves Feel the compressor heads for hot spots or one
head running hot. Replace worn or leaking
valves.
Restriction in the discharge gas line Check all hand and check valves to make sure
they are fully opened and not stuck. Repair or
replace as needed.
Internal relief valve leaking Check the compressor manual to see if your
compressor is so equipped. Replace
accordingly.