Service Diagnosis - Scotsman CME686 User Manual

Service Diagnosis

Problem or Symptom
Low capacity
Poor ice formation - very cloudy
and misshapen
Whistling noise at CP unit during
harvest
Possible Cause
Dirty condenser
Air temperature intake to condenser
very high
Water temperature intake to ice making
section very high
False bin full - bin full light is ON and the
bin is not full
Storage bin or dispenser not holding ice
properly
High volume of drinks dispensed, cold
plate melting ice
Vapor inlet valve leaks through slightly
during the freeze cycle
Cascading shield missing/out of position
and water is cascading out of the
reservoir
Exceeding maximum freeze time,
compressor unit trips on high discharge
temp
Dirty water system
Low refrigerant charge.
By pass and liquid inlet valve coils not
getting power
April 2002
Page 43
Eclipseä 600, 800, 1000
Probable Correction
Clean condenser
Re-orient condenser to avoid hot air
intake
Check for hot water supply to ice
machine due to mal-functioning or
non-existent hot water check valve at
dishwashing sink
If using optional thermostat, unplug from
terminal 7 and check controller. Bin full
light must go out within 4 minutes or ice
sensors need checking.
Check ice sensors for proper position
Check ice sensors for scale build up
Check drains for water flow from ice
machine (separate to correct) or
restriction
Suggest pre-cooler for water supply to
cold plate
Check valve body for similar
temperatures on inlet and outlet, the
outlet should be colder and frost
develops on the tubes to the
evaporators
Install or re-secure cascading shield.
Check water distributors for proper
attachment.
Check condenser bypass valve
Clean the water distributors and the tops
of the evaporators to remove built up
mineral scale
Add several pounds of refrigerant to
check. If low on charge, locate leak.
Recover refrigerant, repair leak, replace
drier, evacuate to 300 microns and
weigh in the nameplate charge.
Check harness