Diagnostics - Water Cooled - Scotsman Prodigy C0322 Technical & Service Manual

Diagnostics - Water Cooled

Problem
Shut down on
maximum harvest time
Shut down on
minimum freeze time
Likely Cause
Ice bridge thickness too small, not enough ice
to open curtain
Ice bridge thickness too large, ice frozen to
evaporator frame
Purge valve does not open, water melts ice
bridge, not enough ice to open curtain
Incomplete ice formation
Curtain out of position
Curtain switch does not open when curtain
does
Machine in very cold ambient
Hot gas valve does not open
Harvest assist probe out of position – ejector
pin not retracted
Damaged evaporator
Grounded ice thickness sensor
Restricted water distributor
Dirty spillway surface
Bridge thickness too thin
January 2015 Page 47
Probable Solution
Check and adjust if needed
Check and adjust if needed
Check purge valve
Check water distributor for partially
plugged holes
Check curtain for swing restriction
Check switch with ohmmeter
Move machine to a warmer location
Check hot gas valve, check controller
using test mode
Check harvest assist mechanism – spring
should retract pin
Check evaporator surface
Check sensor for dirt and position. Clean
and check gap to evaporator surface
Clean water distributor
Scrub spillway
Adjust to correct thickness