Service Manual

EH330, EH430 and ECC Condensing Unit
Remote Low Side Cuber Service Manual
May 2015
Page 41
Problem or Symptom Possible Cause Probable Correction
No ice No refrigeration, unit shut down,
maximum freeze time code dis-
played
Check compressor, refrigerant
charge, and liquid inlet valve. Note
that if liquid inlet valve is not open,
compressor will pump down and
suction pressure will be very low.
Sump frozen Check for welded contactor
No water to ice making section Water level sensor working prop-
erly
Clean or replace sensor
Slow ice release during harvest Cubes are too large Check ice thickness sensor
Check for water leak
Condenser by-pass valve does not
open
Check coil of valve
Check power to valve during har-
vest
No ice sensed during harvest Ice sensing system failure Check curtain switch
No ice released to bin Ice outlet blocked - check for ob-
struction
No ice released, vapor inlet valve
does not open
Check coil for continuity, if open
replace coil
Check for 24 volts to coil during
harvest, if none, check at relay in
EH head
Check low side pressure, if pres-
sure does not rise during harvest,
and valve is electrically OK, re-
place vapor inlet valve
No ice, Code 1 Displayed Freeze cycle too long Check for false sump full indication
(See page 28)
Check condensing unit operation
Check refrigeration including head
pressure control valve, vapor
valve, bypass valve
Check water valve for leak thru
Check purge valve for leak thru
No ice, Code 2 Displayed Harvest cycle too long Check harvest assist
Check for false sump full
Check curtain switch
Check bypass and vapor valve
operation
No ice, Code 3 Displayed Water supply inadequate Check water supply and inlet water
solenoid valve
No ice, Code 8 Displayed Freeze cycle too short Check / clean ice thickness sensor
Clean water system (See page 27)
Scrub evaporator spillway (See
page 26)
Service Diagnosis