Scotsman DCE33 Series User Manual page 20

DCE33
SERVICE DIAGNOSIS
PROBLEM
No ice falling in bin, but machine
operates
POSSIBLE CAUSE
Ice may be stuck in the
evaporator and the unit is "frozen
up".
Too much heat load.
No water spray
Cube size control will not close
No airflow
Not enough refrigerant
Restricted system
Hot gas valve leaks thru
Compressor will not operate or
pumps poorly.
PROBABLE CORRECTION
Check water supply - filter may be
restricted
Check inlet water valve - screen
may be restricted, or valve does
not operate.
Hot gas valve may not operate -
check and repair/replace.
Harvest time set too short - timer
needs adjustment.
Inlet water valve leaks thru, needs
to be replaced.
Water pump does not work,
replace it.
Water leak from reservoir, locate
and repair.
See "Too much heat load" or "not
enough refrigerant"
Control defective - must be
replaced.
Fan motor not turning, needs to
be replaced.
Fan blade broken, needs to be
replaced.
Condenser completely blocked
up, needs cleaning.
Add low side access valve, locate
leak, recover refrigerant, repair,
replace dryer, evacuate and
weigh in the nameplate charge.
Add low side access valve,
recover refrigerant, replace dryer,
evacuate and weigh in the
nameplate charge.
Add low side access valve,
recover refrigerant, replace hot
gas valve and dryer, evacuate
and weigh in the nameplate
charge.
Start relay or capacitor needs to
be replaced.
Add low side access valve,
recover refrigerant, replace
compressor and dryer, evacuate
and weigh in the nameplate
charge.
August 1995
Page 20