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:
