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(Probable cause /
Remedy
)
Compressor does not run:
Seized.
Energize and measure current
Motor burn out, broken insulation
Check insulation resistance with 500 V
ohmmeter (2 M
min.)
Open winding
Check continuity and resistance
Internal protection or circuit breaker open
Check continuity
Compressor cycles on and off:
Open thermal protection
Check operating pressure
Excessive current
Energize and measure current
Insufficient cooling capacity:
Low compression
Check operating pressures and running
current
Abnormal noise and vibrations:
Liquid slugging
Check system operating conditions
Bolts/springs loose
Retighten
Compressor
troubleshooting
(Probabile causa /
Rimedio
)
Il compressore non parte:
Grippato
Mettere in tensione e verificare l’intensità
Motore bruciato, isolamento danneggiato
Controllare la resistenza l’isolamento con
un ohmmetro da 500V (2 M
min.)
Avvolgimento aperto
Verificare la continuità e la resistenza
Protezione termica aperta o sezionatore
aperto
Verificare la continuità
Il compressore si avvia e si ferma:
Protezioni termiche aperte
Verificare la pressione di funzionamento
Sovratensione
Mettere in tensione e verificare l’intensità
Resa di raffreddamento insufficiente:
Compressione troppo bassa
Controllare le pressioni di funzionamento
e la corrente
Strani rumori e vibrazioni:
Ingresso di liquido
Verificare le condizioni di funzionamento
Bulloni/molle non corretamente serrati
Verificare il serraggio
Ricerca inconvenienti
del compressore
38


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