Scotsman BC0530 Service Manual page 34

BC0530 Service Manual
Note: Component relationships and/or operation,
other than described, indicate component failure,
maladjustment or improper reassembly when
servicing the ice machine.
ACTUATOR MOTOR ELECTRICAL TESTS
The following tests are for troubleshooting the
actuator motor and related circuits:
Use an AC voltmeter set for the proper range.
Voltages in the tables are measure across the motor
reversing capacitor (between the colored motor lead
wires.
If there is no ice in the evaporator(s) and the water
plate(s) is(are) not fully closed (with the water plate
switch(es) pushed up and the "ARMS UP" LED on),
the actuator motor(s) and pump(s) should be running.
If not, be sure there is power to the motor(s) and
also that the motor(s)is(are) not overheated and off
due high temperature. Allow the motor to cool down
before starting the test procedure.
Always refer to the proper wiring diagram when
troubleshooting.
Motor winding resistances at 75˚ F (24˚ C) out of the
circuit are as follows:
REX 115volt motors, white to black or yellow,
approximately 95 ohms
Voltage Reading
115 volt motors, reads 180-240
Line voltage for any voltage motor
Line voltage for any voltage motor in one
actuator switch position and 0 volts in the
other position
115 volt motors, reads 180-240
in one actuator switch position and 0
volts in the other position
0 volts in both actuator switch positions.
Be sure there is power to the motor (line
voltage) by leaving one probe on either
capacitor lead and placing the other
probe on the white motor lead.
PROBE TEST PROCEDURE
Water Level Probes:
Water Float Probes can be tested at any temperature
and are good if they exhibit continuity.
Evaporator Temperature and Ice Level Probes:
The evaporator temperature probe and the ice level
probe are designed to have a nominal resistance of
32,650 k ohms at 32° F (0°C). To test these probes
they must be placed in ice water 32°F (0°C) for a
minute and then checked for resistance while the tube
is still in the ice water. A probe is considered good if
it exhibits a resistance value of 32,650 k ohms at 32°
F (0°C). Probes with values outside this range should
be replaced.
Actuator Motor Test Parameters
Capacitor
Good
Open
Open and → One motor wind-
Good One motor wind-
Shorted or → Both motor wind-
March 2020
Page 34
Motor Remedy
Good Tap gear case to align bearings
Good Replace capacitor
Replace capacitor and
ing open
Replace motor
ing open
Disconnect the actuator motor
ings open from the circuit and test the
winding resistance. If approx-
imately 500 ohms from white
to red or yellow, replace the
capacitor. If the resistance is
erratic, replace the motor.