Scotsman DCE33 - Manual (Page 22)

SERVICE DIAGNOSIS
DCE33
September 2011
Page 22
PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION
No ice falling in bin, but machine
operates Ice may be stuck in the evaporator
and the unit is “frozen up”. 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.
Too much heat load. Inlet water valve leaks thru, needs
to be replaced.
No water spray Water pump does not work,
replace it.
Water leak from reservoir, locate
and repair.
Cube size control will not close See “Too much heat load” or “not
enough refrigerant”
Control defective - must be
replaced.
No airflow Fan motor not turning, needs to
be replaced.
Fan blade broken, needs to be
replaced.
Condenser completely blocked
up, needs cleaning.
Not enough refrigerant Add low side access valve, locate
leak, recover refrigerant, repair,
replace dryer, evacuate and weigh
in the nameplate charge.
Restricted system Add low side access valve,
recover refrigerant, replace dryer,
evacuate and weigh in the
nameplate charge.
Hot gas valve leaks thru Add low side access valve,
recover refrigerant, replace hot
gas valve and dryer, evacuate and
weigh in the nameplate charge.
Compressor will not operate or
pumps poorly. 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.