Scotsman UC2024 Series Service Manual page 28

UC2024 and UC2724 Service Manual
Symptom
No ice in bin
Ice is poorly formed,
does not release as a
group
Ice too large or too small Cube size out of adjustment Adjust cube size.
Water leak from cabinet
Water backs up into bin
during harvest
Excessive noise
Slow or Low production
Sump water hot
Unit cycles off and
restarts
Note: A damaged power cord must be replaced by the identical, OEM service part.
Possible Cause
Ice is made, but does not
release
Evaporator surface
damaged
Fouled water distributor
Cube size too small
Refrigeration uneven
Unit using timed cycles
Unit using timed cycles
Check drain tubing
External drain tubing has
trap or not vented
Tubing contact
Fan blade out of balance
Water pump worn
Compressor noisy
Air filter is dirty
Condenser is dirty
Room and/or Water
Temperature too high
Restricted air flow to unit
High pressure control
cycling unit
Connected to hot water
Hot gas valve leaking by
Loose electrical connection
November 2019
Probable Correction
Check hot gas valve for proper operation
Check plating and grid condition, replace evaporator
if damaged
Clean water distributor
Adjust cube size
Check refrigerant charge and TXV superheat
Check for evaporator tube separation
Evaporator thermistor out of range. Check controller
for all cube size and harvest time lights flashing.
See page 24.
Evaporator thermistor out of range. Check controller
for all cube size and harvest time lights flashing.
See page 24.
Correct leaking tubing
Correct drain tubing configuration
Check for tubes rattling and panels not tight
Replace fan assembly
Replace pump
Replace compressor
Clean air filter
Check and clean condenser
Maximum production will be achieved at 70°F / 21°C
air and 50° / 10°C water
Check and remove air flow restrictions
Unit will be off for significant time before control
resets. Check for cause of high pressure.
Connect to cold, potable water.
Replace hot gas valve
Check power cord and outlet. Outlet may be worn,
replace worn outlet.
Page 28