Omcan IC-CN-0040, Инструкция по эксплуатации, Страница: 18 / 56

18
Troubleshooting
from a high pressure liquid to a low pressure liquid. This drop in pressure causes the refrigerant to cool. The
cooled refrigerant absorbs heat from the water circulating over the evaporator. As the evaporator fills with
liquid refrigerant, the evaporator becomes colder. The flow of refrigerant into the evaporator is controlled by the
temperature at the outlet of the evaporator. The expansion valve bulb, mounted to the top of the suction line,
senses the evaporator outlet temperature causing the expansion valve to open or close. As ice forms on the
evaporator, the temperature drops and the flow of refrigerant into the evaporator decreases, resulting in a drop
in suction pressure. The evaporator should become completely flooded (filled with liquid refrigerant) during
the freeze cycle. A completely flooded evaporator will have a uniform freeze pattern (ice formation across the
evaporator). A starved evaporator (not enough liquid refrigerant) will have poor or no ice formation at the top of
the evaporator, and the tube(s) exiting the evaporator will not frost. All tubes should be frosted approximately
5 minutes from the start of the freeze cycle. An expansion valve that is restricted or not opening properly will
starve the evaporator resulting in lower than normal suction pressure. A low refrigerant charge will also starve
the evaporator and cause low suction and discharge pressures. If not sure of the amount of charge in the
system, the refrigerant should be recovered and the correct charge be weighed in before a defective valve can
be diagnosed. If the evaporator is starved but the suction pressure is higher than normal, the TXV is not the
problem, refer to the above charts. If the TXV sticks open or if the thermal bulb is not making good contact with
the suction line, the flow of refrigerant into the evaporator will be too great and liquid refrigerant will flood the
compressor. The suction pressure will remain higher than normal and the machine will remain in an extended
freeze cycle. Ice will build evenly but will be very thick.
Instructions Français
SÉCURITÉ ET GARANTIE
• Eteignez l’appareil et le débrancher avant toute opération de nettoyage, d’entretien ou de réparation.
• Ne pas faire fonctionner l’appareil avec un cordon d’alimentation endommagé. Si un cordon d’alimentation
endommagé se trouve, mettez immédiatement l’appareil hors tension et débranchez-le. Ne pas faire
fonctionner à nouveau jusqu’à ce personnel qualifié a résolu le problème.
• Ne faire fonctionner l’unité dans un sol plane. Ne pas placer l’appareil près de sources de chaleur.
• Utiliser uniquement des pièces de rechange d’origine pour les réparations.
1 AN PIÈCES ET GARANTIE DU TRAVAIL
Dans la période de garantie, contacter Omcan Inc. au 1-800-465-0234 pour planifier une Omcan
technicien autorisé à réparer l’équipement localement.
Entretien non autorisée annulera la garantie. La garantie couvre les pannes électriques et une partie
pas une mauvaise utilisation.
S’il vous plaît voir www.omcan.com/warranty.html pour info complète.