Water Level Sensor - Scotsman C2648 - SERVICE MANUAL 11-2010 Service Manual

C2648 Service Manual

Water Level Sensor

1. Test using the controller's indicator lights (sump empty and sump full). Unit must be powered up and
there must be water in the sump. Add some manually if needed. Locate water level sensor. Release
from sump cover and slowly lift up until the mid-length probe is out of the water. The sump empty light
should come on, and if the unit is on the inlet water solenoid valve will open to fill the reservoir. Return
the water level sensor to its normal position. If the unit is on and calling for ice the water will fill until the
top probe is in contact with it, at that time the sump full light will switch ON.
2. Test with an ohmmeter. Disconnect electrical power. Open the control box cover. Unplug the
connector at J9. Locate water level sensor and remove it from the sump cover. Test 1: Place one lead of
the ohmmeter on the longest probe and the other on the controller end of the red wire, there should be
continuity. Test 2: Place one lead on the controller end of the white wire and the other on the mid-length
probe, there should be continuity. Test 3: Place on lead on the controller end of the black wire and the
other on the shortest probe, there should be continuity. If not, clean the probes and recheck.
3. Test the controller's water level sensor circuit. Reconnect electrical power. Unplug harness from water
level sensor, the sump empty light should be ON. Jump harness wires white and black. The sump full
light should be ON. Jump harness wires white and red, the sump full and sump empty lights will be OFF.
Check harness wire by wire for continuity if there is no reaction from the controller during this test.
Sump Empty
Light
Water Level
Sump Full
Sensor
Light
November 2010
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