Service Diagnosis - Scotsman EH330 C Series Service Manual

EH330, EH430 and ECC Condensing Unit
Remote Low Side Cuber Service Manual

Service Diagnosis

Problem or Symptom
Low capacity
Poor ice formation - very cloudy
and misshapen
Whistling noise at condensing unit
during harvest
Possible Cause
Dirty condenser
Air temperature intake to condens-
er very high
Water temperature intake to ice
making section very high
Ice broken up and stuck between
reservoir and curtain, happens
almost every cycle
Storage bin or dispenser not hold-
ing ice properly
High volume of drinks dispensed,
cold plate melting ice
Vapor inlet valve leaks through
slightly during the freeze cycle
Exceeding maximum freeze time,
compressor unit trips on high dis-
charge temp
Dirty water system
Low refrigerant charge.
By pass and liquid inlet valve coils
not getting power
July 2013
Page 42
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
Ice thickness set too thin
Ice very uneven, check superheat
Slow harvest, check headmaster
Check drains for water flow from
ice machine (separate to correct)
or restriction
Suggest pre-cooler for water sup-
ply 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
Check condenser bypass valve
Clean the water distributor to re-
move 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 name-
plate charge.
Check harness