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
No ice
Possible Cause
No power to ice making section
No power to condensing unit
No lights on controller
Unit manually switched off
Power to both sections, controller reset,
but condensing unit does not operate
No power to compressor contactor coil.
No water to ice making section, controller
blinking water light
Ice making section has exceeded
maximum freeze time and controller has
shut down the system
Ice making section has exceeded maxi-
mum harvest time and shut down the
system
Condensing unit solenoids do not activate
during harvest
July 2013
Probable Correction
Restore power
Restore power
Check transformer
Push and release the On button, ask
user why it was shut off
Interconnecting control wire discon-
nected, reconnect it
Low or high pressure cut outs open,
check system pressures
Check toggle switch in condensing
unit.
Check EH head compressor relay.
Restore water supply, check water
filters, reset controller
Check inlet water valve operation
Check water level sensor
Condenser coils may need cleaning
Check condenser fan blade and
motor
Check for excessive air intake tem-
peratures at condenser coil
Check compressor contactor
Check compressor and starting
components
Check water pump
Check purge valve for leak through
Check vapor inlet valve for leak
though
Check ice making section for lime
scale build up, clean as needed
Check condenser by pass valve
Check vapor inlet valve
Check headmaster
Check curtain switch
Check inlet water valve for leak
through
Check for obstruction in ice delivery
chute
Check solenoid relay in EH head
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