Scotsman AFE400 - Manual (Page 18)

Service Diagnosis: Condition - No Ice Being Produced
STATUS: ICE MAKER DOES NOT OPERATE
A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate. If the voltage is
correct and the unit will not start, go to B.
B. Check: The master switch, switch ON if off. If the unit does not start go to C.
C. Check: The reset switch, (high pressure): depress and release the high pressure reset switch. If the
unit still does not start, go to D.
The pressure control opens at 250 PSIG (+ or - 30). Normal operation: water cooled - water will flo w from
the condenser drain; air cooled - the fan blade turns and pulls hot air out of the machine. On water cooled,
if the water supply was turned off, the unit will possibly trip on high pressure.
If the unit trips out on pressures below 220 PSIG, replace the control.
D. Check that the bin thermostat is closed. If open with no ice on it, turn thermostat knob CCW, if this
does not close the thermostat, replace it. If the thermostat is closed and the unit will not start, go to E.
E. Check the water pressure to the unit. The machine will not run if there is not enough water pressure.
Restore/adjust water supply. If the unit will not start with good water pressure, go to F.
F. Check that the Auger Delay contacts 3-2 are closed. If open, and the low side (suction) pressure is
over 35 PSIG, replace the auger delay pressure control. If contacts 3-2 are closed, and the unit wil l not
start, go to G.
G. Check: The gear motor, if it will not run, the compressor will not run. If there is power to the auger drive
motor, and it does not run, replace the auger drive motor. If the motor operates, but the compressor will not
start, go to H. Note: The gearmotor may not go to full speed if the evaporator bearings are worn or the
evaporator needs cleaning.
H. If the gearmotor operates, but the compressor contactor coil does not have power, check the
centrifugal switch. If the contactor coil does have power but does not pull in, replace the contactor. If all
of the above check out, there will be power to the compressor.
AFE400
May 1995
Page 18