Manitowoc UDE065A Technician's Handbook

Also see for NEO UD0140A: Technician's handbook Installation, operation and maintanance manual Technician's handbook Installation, operation and maintenance

Contents

118 Part Number 000014797 Rev02 05/18Harvest Valve AnalysisThe valve can fail in two positions:• Valve will not open in the harvest cycle.• Valve remains open during the freeze cycle.VALVE WILL NOT OPEN IN THE HARVEST CYCLEAlthough the circuit board has initiated a harvest cycle,the evaporator temperature remains unchanged from thefreeze cycle.VALVE REMAINS OPEN IN THE FREEZE CYCLE:Symptoms of a harvest valve remaining partially openduring the freeze cycle can be similar to symptoms ofan expansion valve, float valve or compressor problem.Symptoms are dependent on the amount of leakage in thefreeze cycle.A small amount of leakage will cause increased freezetimes and an ice fill pattern that is “Thin at the Outlet”, butfills in at the end of the cycle.As the amount of leakage increases the length of thefreeze cycle increases and the amount of ice at the outletof the evaporator decreases.Refer to the Parts Manual for proper valve application. Ifreplacement is necessary, use only “original” Manitowocreplacement parts.