28
Model R280
Unable to calibrate
one side or both
sides
Error message has not been cleared. Press the up arrow to U1 then press the diamond twice.
Accumulator door assembly movement is
being restricted.
Verify the accumulator door shaft collars are pushed all the way
to the back of the cabinet.
Check for fries interfering with the accumulator door shafts.
Check for frost buildup. Defrost daily.
Verify magnet block is secure to the mechanism and no foreign
object is attached to the magnet.
Check for anything restricting movement of the assembly.
Weighing system fault. (Use functions
D14 and D15 to diagnose weighing
system.
d14 shows calibrated scale weight readings in grams or pounds.
With the accumulator housing in place this reading should reflect
the actual calibrated weight on the accumulator doors.
d15 shows actual scale volts. With the accumulator housing in
place, readings between 2.5V and 3.5V are considered normal
with about a volt increase for each 1 lb. (450 g) of weight added
to the accumulator doors. These numbers are approximate.
d15 - If 0V or no change in voltage when weight is added. Check
and clean the connection at the NCWS weighing board. Check
the connection on the main board and check for restrictions in
accumulator assembly movement. If all is correct suspect the
NCWS board.
The main controller or the cabling may be at fault. Try switching
the NCWS connectors on the main controller, then use d15 to
verify voltages.
Not cooling, no
error code
Temperature number is flashing on the
display while the door is closed. Door
switch issue.
Check door alignment to verify door switch is being activated.
Verify door switch operates.
Verify connector is in the correct socket on the controller, P27.
Faulty temperature probe. Verify temperature probe is reading correctly.
Refrigeration system is running but not
cooling.
Call a certified refrigeration technician.
Problem Probable Cause Corrective Action
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