SERVICE DIAGNOSIS
SYMPTOM
POSSIBLE CAUSE
SUGGESTED CORRECTION
Unit will not run
Blown power in fuse in P.C.Board
Replace fuse & check for cause of
(No warning LEDS glows)
blown fuse
Main switch in OFF position
Turn switch to ON position
Inoperative P.C.Board
Replace P.C.Board
Loose electrical connections
Check wiring
(Green LED-Power ON glows)
P.C.Board selector in STAND BY
Move to OPERATING position
Blown power out fuse in P.C. Board
Replace fuse & check for cause of
blown fuse
(Bin full LED glows)
Inoperative ice level control
Clean or replace ice level control
Inoperative P.C.Board
Replace P.C.Board
(Red-alarm LED glows)
High head pressure
Dirty condenser. Clean
Inoperative fan motor. Replace
Shortage of water (WC)
(Red-alarm LED blinks)
High evaporating temperature
Hot gas valve leak - Replace it.
after 10 mins. beginning freeze
Water inlet valve leak - Replace it.
Evap. sensor inoperative - Replace it.
Short of refrigerant.
Compressor cycles intermittently
Low voltage
Check circuit for overloading
Check voltage at the supply to the
building. If low, contact the power
company
Contactor with burnt contacts
Clean or replace
Non-condensable gas in system
Purge the system
Compressor starting device with
Check for loose wires in starting
loose wires
device
Mechanical problem
Replace compressor
Cubes too small
Freezing cycle too short
Review setting of DIP SWITCH keys
Capillary tube partially restricted
Blow charge, add new gas & drier,
after evacuating systemwithvacuum
pump
Moisture in the system
Same as above
Shortage of water
See remedies for shortage of water
Shortage of refrigerant
Check for leaks & recharge
Inoperative evaporator sensor
Replace sensor
Cloudy cubes
Shortage of water
See remedies for shortage of water
Dirty water supply
Use water softner or water filter
Accumulated impurities
Use SCOTSMAN Ice Machine
cleaner
Spray bar not rotating (AC 225)
Remove spray bar & jet bearing
or slowly rotating
and clean or replace them
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