Service Diagnosis: Condition - No Ice Being Produced - Scotsman FME2400RH Service Manual

SERVICE DIAGNOSIS: Condition - No Ice Being Produced

STATUS: NOTHING OPERATES
A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate.
B. Check: The master switch, switch ON if off.
C. Check the water level in the reservoir. The machine will not run if there is not enough water in the
reservoir. Restore/adjust water level.
STATUS: NOTHING OPERATES
D. Check: The gear motor, if it will not run, the liquid line valve will not open. If no power to it:
Check: The indicator lights on the circuit board, the bin empty light should be ON, the no water light should
be OFF .
1. If the bin empty and no water lights are off, check the transformer.
a. Transformer "load" side should have 12 to 15 volts. If not, check the "line" side. The line
side should have between 208-230 volts. If the line side has the correct voltage and the
load side does not, replace the transformer.
2. If the transformer is good, and the bin empty light is OFF, check the ice level sensors.
a. Remove sensors by sliding them sideways out of the ice chute. Visually inspect them,
clean if needed.
b. Look through the ice chute "eye" hole for something blocking the ice chute.
c. If the unit still does not run, replace the ice level sensors.
d. If the bin empty light is still OFF, check the circuit board. SEE LAST PAGE FOR TESTER
INFORMATION
3. If the transformer is fine, and the "no water" light is ON, check the water level sensor.
a. Check the water level in the reservoir, restore if low. If the water level is ok:
b. Remove the water level sensor from the reservoir and clean the tip if dirty.
CAUTION: THE TIP IS MADE OF GLASS
c. Replace the water level sensor. If the no water light is still on, check that the
"water sen" plug is firmly plugged into the circuit board.
d. If the no water light is still on, SEE LAST PAGE FOR TESTER INFORMATION
e. If after the above, the machine still will not run, replace the water level sensor
STATUS: GEARMOTOR OPERATES, BUT NO ICE IS MADE
A. Check the liquid line valve relay.
The relay is on the circuit board, if it does not supply power to the liquid line valve, the
valve will not open.
1. Check for power at the valve coil, if none:
a. Check for power at the liquid line valve relay at the circuit board.
If there is power at the relay, but none at the liquid line valve coil,
Check for an open wire between the relay and the valve.
2. Check the valve coil. If the coil is open, replace the liquid line valve.
3. Check the auger drive motor centrifugal switch. If, when the drive motor is running,
contact 4 (black wire removed) has no power, and all of the above switches have been
checked, replace the centrifugal switch, or the drive motor.
4. If the liquid line valve relay on the circuit board has power on the NO contact, but not on the COM
contact, replace the circuit board.
January 1995
Page 17
FME2400RH