Manitowoc Q210 Manual de servicio Pagina 131

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Section 7 Refrigeration System
Part No. 80-1100-3 7-19
Freeze Cycle Suction Pressure High Checklist
Freeze Cycle Suction Pressure Low Checklist
NOTE: Do not limit your diagnosis to only the items
listed in the checklists.
Possible Cause Check/Correct
Improper installation See “Installation/Visual Inspection Checklist” on Page 7-10
Discharge pressure Discharge pressure is too high, and is affecting low side
(See “Freeze Cycle Discharge Pressure High Checklist” on Page 7-16)
Improper refrigerant charge Overcharged
Wrong type of refrigerant
Other Non-Manitowoc components in system
H.P.R. solenoid leaking
harvest valve stuck open
TXV flooding (check bulb mounting)
Defective compressor
Possible Cause Check/Correct
Improper installation See “Installation/Visual Inspection Checklist” on Page 7-10
Discharge pressure Discharge pressure is too low, and is affecting low side
(See “Freeze Cycle Discharge Pressure Low Checklist” on Page 7-16)
Improper refrigerant charge Undercharged
Wrong type of refrigerant
Other Non-Manitowoc components in system
Improper water supply over evaporator (See “Water System Checklist” on page 7-10)
Loss of heat transfer from tubing on back side of evaporator
Restricted/plugged liquid line drier
Restricted/plugged tubing in suction side of refrigeration system
TXV starving
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