Service manual
Page 35
Page 35
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)
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 15 mins. beginning freeze Water inlet valve leak - Replace it.
Short of refrigerant.
Compressor cycles intermittently
(Freezing LED + Red-alarm LED glow)
Condenser sensor out of order Replace it
(Freezing LED + Red-alarm LED blink)
Evaporator sensor out of order Replace it
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 Replace it
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 refrigerant Check for leaks & recharge
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
Shortage of water Water spilling out through curtain Check or replace curtain
Water solenoid valve not opening Replace valve
Water leak in sump area Locate and repair
Water flow control plugged Replace water inlet valve
Leak of water drain valve Replace valve