Refrigeration Diagnostics Overview Ude0065 - Welbilt Manitowoc NEO UDE0065A Technician's Handbook

REFRIGERATION DIAGNOSTICS OVERVIEW UDE0065

UDE0065 ice machines have a very small refrigerant charge
and we do not recommend diagnosing the ice machine
using refrigerant pressures. For this reason refrigeration
access fittings are not installed during production and the
ice machine is diagnosed with temperatures.
Verify that your water flow is even across the entire
evaporator before diagnosing the refrigeration system.
Mineral build-up on the evaporator assembly can cause
water tracking and an erratic ice fill pattern. Descale with
Manitowoc Ice Machine cleaner/descaler to remove
any mineral buildup before diagnosing the refrigeration
system.
The following can be used for diagnostics:
1. Install a temperature lead on the compressor suction
line within 6" of the compressor.
2. Install a temperature lead on the compressor
discharge line within 6" of the compressor
3. Refer to the "Cycle Times, 24 Hr. Ice Production
and Refrigerant Pressure Charts" on page 216 to
determine the correct temperature operating range
for your air and water temperature.
4. Record the temperatures throughout the freeze and
harvest cycles.
NOTE: First cycle is not used for refrigeration system
diagnostics. Run a minimum of two cycles to allow the
system to stabilize and record the second cycle.
Part Number 000014797 Rev02 05/19 131