Service Diagnosis - Low Ice Making Capacity - Air Cooled - Scotsman CU1526 Service Manual

Service Diagnosis - Low ice making capacity - air cooled

Problem
Long freeze cycle
Long Harvest Cycle
False bin full signal
Makes excessive noise - air cooled
Problem
Fan blade vibrates
Compressor vibrates
Water pump vibrates
Panels vibrate
Likely Cause
Dirty air filter
Dirty condenser
Hot ambient
Water leak
Water inlet valve leaks through
Low on refrigerant
Incorrect superheat
Fan(s) cycle on and off
Dirty evaporator
No harvest assist
Bridge thickness too big
Machine in very cool ambient
Ice jammed in between curtain and
sump
Curtain does not close correctly
Likely Cause
Blade is bent
Fan motor mount is broken
Mounting bolts loose
Pump bearings worn
Mounting screws loose
May 2008
Page 31
CU1526, CU2026, CU3030
Service Manual
Probable Solution
Clean filter
Clean condenser
Reduce room air temperature
Check purge valve, check curtain
Check inlet valve
Add refrigerant, if cycle time drops,
check for leak
Check evaporator superheat, if
significantly low or high, replace
TXV
Check pressures fans cycle at.
Replace fan pressure switch if too
low
De-scale water system
Check harvest assist solenoid
Check and adjust bridge thickness
Increase room temperature
Clear ice away
Check curtain for proper swing
Probable Solution
Replace fan blade
Replace motor mount
Tighten bolts
Replace pump
Tighten screws