Scotsman C2648 - Manual (Page 42)

C2648 Prodigy and Prodigy Plus Service Manual
January 2015
Page 42
Problem Likely Cause Probable Solution
Shut down on maximum harvest
time (continued)
Curtain switch does not open when
curtain does
Check switch with ohmmeter
Machine in very cold ambient Move machine to a warmer
location
Hot gas valve does not open Check hot gas valve, check
controller using test mode
Harvest assist probe out of position
– ejector pin not retracted
Check harvest assist mechanism –
spring should retract pin
Damaged evaporator Check evaporator surface
Shut down on minimum freeze
time
Grounded ice thickness sensor or
bridge too thin
Check sensor for dirt and position.
Clean and adjust gap to evaporator
surface using 7/32” drill bit as a
gauge
Improper water flow Check water distributor cover, be
sure it is sealed tightly
Check/clean spillway surface
Low Ice Making Capacity
Problem
Long freeze cycle
Likely Cause Probable Solution
Dirty condenser Clean condenser
Hot ambient Check condenser inlet temp.
Water leak Check purge valve, check curtain
Water inlet valve leaks through Check inlet valve
Low on refrigerant Add refrigerant, if cycle time drops,
check for leak
Incorrect superheat Check evaporator superheat, if low
replace TXV
Long Harvest Cycle Dirty evaporator De-scale water system
No harvest assist Check harvest assist mechanism
Bridge thickness too big Check and adjust bridge thickness
Machine in very cool ambient Increase room temperature
False bin full signal Ice jammed in
between curtain and sump
Clear ice away
Curtain does not close correctly Check curtain for proper swing
Diagnostics