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ELECTRONIC CONTROL FOR REFRIGERATORS, FREEZERS AND WARMERS
OPERATIONS MANUAL
CONTROL TROUBLESHOOTING (Continued)
Problem
Cause
Checks
Error Codes:
E0 - Regulation Probe
Error (Black)
E1 - Evaporator Probe
Error (Red)
E2 - Ambient Probe
Error (White)
1. Loose probe wire/
connections
2. Bad probe
3. Bad control
1. Make sure probes are installed in
proper terminals. See parameter section
of manual for wiring locations. Make
sure the green terminal block on the self-
contained control is fully seated. Make
sure there are not any loose strands of
wire. Make sure screw terminals are
not clamping down on wire sheathing
instead of the probe wire.
2. Ohm out probe. See Probe Resistance
Value Chart. For self contained control
can remove the green terminal block of
probe wires from control and then take
resistance values on the screw terminals.
For split control, must remove probe to
take resistance.
3. Remove probes from the control.
With control powered, should get 5VDC
between probe common and other
terminal probe screws into.
Error Codes:
L0 - Low Temperature
HI - High Temperature
1. Cabinet temperature
exceeds alarm set point for
60 minutes.
1. Check alarm parameters: AL, AH, Ad.
Display High
Temperature
1. Something wrong with
refrigeration system.
2. Door was just opened
for a long duration,
excessive door openings,
loading warm product,
missing pans in rail.
3. Set point too high
1. Do standard refrigeration system
checks.
2. Keep door closed and see if tempera-
ture pulls down. NOTE: Display reads
cabinet air, not product temperature.
3. Check set point and adjust if
necessary. Can also increase the display
delay parameters to slow down display
response. Increase the /3 parameter on
the split by 1. Increase the /2 parameter
on the self contained by 5.
Evaporator Coil Icing
1. Something wrong with
refrigeration system.
2. Insufficient defrost time
3. Parameters incorrect
1. Do standard refrigeration system
checks.
2. Check the DI and Dt parameters.
Adjust if necessary.
3. Check parameters to parameter list in
this manual.
After modifying a
parameter, controller
continues working
with old values
1. The control has not
updated the old value
or the parameter setting
procedure has not been
ended correctly by pressing
the SET button for 3 s
1. Temporarily disconnect and reconnect
power to the control. Go back in to
parameter to see if the change worked.
