Troubleshooting Industrial Refrigeration (Continued)
REMEDY OR COMMENT
Discharge pressure too high (continued).
Water flow is inadequate (continued).
Check control valve.
Check water temperature.
Airflow is restricted
Liquid refrigerant backed up in condenser
Check and clean:
Find source of restriction and clear.
If system is overcharged, remove refrigerant
Check to make sure equalizer (vent) line is
properly installed and sized.
Discharge pressure too low
Spray nozzles on condensers plugged
Ambient air is too cold
Install a fan cycling control system.
Water quantity not being regulated properly
Install or repair water regulating valve.
Refrigerant level low
Check for liquid seal, add refrigerant if
Evap condenser fan and water switches are
Reset condenser controls.
Suction pressure too low
Light load condition
Shut off some compressors.
Slow down RPM of compressor.
Check process flows.
Short of refrigerant
Add if necessary
Evaporators not getting enough refrigerant
Discharge pressure too low. Increase to
maintain adequate refrigerant flow.
Check liquid feed lines for adequate
Check liquid line driers.
Refrigerant metering controls are too small
Check superheat or liquid level and correct as
Suction pressure too high
Low compressor capacity
Check compressors for possible internal
Check system load.
Add more compressor capacity.