Trane CGCL 200, Установка, эксплуатация и обслуживание

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CGCL-SVX01B-E4 21
Maintenance
Note:
The above is not a comprehensive analysis of the Scroll compressor refrigeration system. The aim is to give operators
simple instructions on basic unit processes so that they have the technical knowledge to identify and bring defective
operations to the notice of qualified technicians.
Symptom Problem cause Recommended action
I) Suction pressure too high
Compressor operates continuously.
Suction duct abnormally cold.
Refrigerant flows back to compressor.
Excess cooling demand on evaporator
a) Expansion valve too far open.
b) Expansion valve locked in open position.
Check system.
a) Check for superheat and check that expansion
valve bulb is secure.
b) Replace.
J) Suction pressure too low
Excessive pressure drop through filter drier.
Refrigerant does not flow through thermostatic
expansion valve. Drier filter clogged.
Expansion valve bulb has lost its refrigerant. Replace the filter drier.
Replace the bulb.
Loss of power. Expansion valve obstructed. Replace.
Superheat too low. Excessive pressure drops through evaporator. Check adjustment of superheat and adjust
thermostatic expansion valve.
K) Insufficient cooling capacity
Low pressure drops through evaporator Low water flow rate. Check water flow rate. Check state of strainer,
check for obstruction in chilled water pipes.
Check pressure switch contact in water.
L) Condenser fan
Pulsing noise on fan outlet and duct work
Fan Motor Amps too high
Too much airflow. Fan Available Static
Pressure not according duct friction losses Reduce RPM. Change drive.
Hissing noise at start Belt tension too loose Adjust belt tension.
Vibrations-Noise Fan wheel out of balance
Pulleys/ belt loosened
Shaft bent
Worn bearings Correct balancing
Tighten the drive
Change shaft
Change bearings