Scotsman CME1202 - Manual (Page 26)

CONDITION DETERMINE CAUSE PROBABLE CORRECTION
Ice Machine does not run, it has
power to it, the high pressure
control is closed, the on/off switch
is set to ON. A. Listen for a ticking sound from
transducer. If no noise, go to C. If there is a
noise, check for a light on the
board (models built after 4/93). If
there is a light on, check relay
contacts N.O. and COM. The
contacts should be CLOSED. If
closed, go to D. If not, replace
the board. If light is off, or prior
model, go to B.
B. Remove front panel(s), twist
transducer 1/4 turn and pull out.
DO NOT UNPLUG with power
connected. Examine the
transducer, the inside must be
clean and dry. If the inside of the transducer
(above screen) was wet, replace
it. Set bin level to FULL and aim
at an object about 1-3 feet away.
Machine should restart, if not go
to D.
C. Check power to bin level
control board. Should be 12 volts from
transformer, if not replace
transformer. If there is power go
to D.
D. Disconnect electrical power
and test ice machine circuit by
attaching a jumper wire between
bin thermostat posts on circuit
board part no. 12-1912-01 (the
circuit board with the timer on it).
Reconnect power. If machine does not start go back
to machine circuit. If machine
starts, disconnect electrical
power, remove jumper wire and
reconnect electrical power. Then
go to E.
E. Transducer or ice level board
assembly defective. Replace transducer. Set bin level
to FULL and aim at an object
about 1-3 feet away. Machine
should restart. If this does not
repair unit, replace the board.
Machine runs, makes ice,
switches on and off, but ice level
cannot be controlled. Ice level switch may be defective.
On boards with a light, check by
moving switch & watching light. Replace ice level switch
PARTIAL VIEW
OF CIRCUIT
BOARD
12-1912-01
BIN THERMOSTAT
PLUG - IN
RELAY
POSTS MENTIONED IN
“D” ABOVE
TIMER
Electrical Shock Hazard Can
Cause Personal Injury.
Disconnect Power Before
Servicing.
Bin Thermostat Posts at Line
Voltage.
SERVICE DIAGNOSIS: Ice Level Control Circuit
CME1202 & CME1402
January 1995
Page 26