Scotsman NME654R - Manual (Page 27)

NME654R & FME804R
January 2000
Page 27
No ice, auger motor is turning Compressor contactor coil is open Check / replace contactor
Compressor will not start Check start capacitor
Check start relay
Check compressor windings
Circuit board relay will not close Check / replace board
Pump down pressure switch contacts
do not close, liquid line valve open
and suction pressure high
Check pump down switch contacts
Symptom Possible Cause Probable Correction
Unit makes ice, but very slowly High discharge pressure because of a
dirty condenser coil
Clean the condenser
Auger and evaporator are coated with
mineral scale
Clean the water system
Low refrigerant charge Locate leak. Recover refrigerant,
repair leak, replace dryer, evacuate
and weigh in the nameplate charge.
Water leak Ice storage bin drain restricted Clean out drain
Tubing cracked Replace tubing
Condensation on drain tubing Insulate tubing
Hose off Re-attach hose
Reservoir cover off Return cover to reservoir
Reservoir cracked Replace reservoir
Evaporator water seal leaks Check base of evaporator & drip pan.
If the seal leaks, shut off the water,
remove the auger, replace the water
seal. Check gear motor for water
infiltration.
Excessive ice meltage Bin drain clogged Clean out bin drain
Poor fit between bin door and door
frame
Adjust or replace
Machine makes too much noise Evaporator coated internally with
minerals
Clean with Scotsman Ice Machine
Cleaner
Motor bearings dry Oil or replace motor
SERVICE DIAGNOSIS: