Service Diagnosis - Scotsman NDE554 Service Manual

NDE554 & NDE654

SERVICE DIAGNOSIS

Symptom
Water Leak
Excessive water use
Excessive ice meltage
Machine makes too much noise
Does not dispense
Possible Cause
Drain plugged up
Tubing cracked
Condensation on drain tubing
Hose off
Reservoir cover off
Reservoir cracked
Evaporator water seal leaks
Water cooled model, water
regulating valve not adjusted
properly.
Reservoir float valve leaks thru
Water cooled model, overcharged
with refrigerant
Water cooled model, condenser
coated with minerals
Bin drain clogged
Improper installation of drains, they
are connected.
Poor fit between bin door and door
frame
Evaporator coated internally with
minerals
Motor bearings dry
Vend switch does not close
No ice in bin
Ice not flowing out of bin
March 2000
Page 22
Probable Correction
Clean out drain
Replace tubing
Insulate tubing
Reattach hose
Return cover to reservoir
Replace reservoir
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.
Adjust to 245 PSIG discharge
pressure
Replace float valve or seat
Recover and weigh refrigerant.
Weigh in correct charge.
Acid clean water cooled condenser.
Clean out bin drain.
Drains must be separate.
Adjust or replace
Clean with Scotsman Ice Machine
Cleaner
Oil or replace motor
Check / replace switch
Check bin, check ice machine
section
Check vane for proper rotation
Check inner bin bottom
Bin walls have scale on them,
remove scale