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Error codes may be encountered if either the controller or the display case is malfunctioning. The following
is a list of error codes that may be encountered.
Table 1 - Error Codes and Resolutions
Code
Description
Cause
Resolution
E0
Temperature probe
error
Probe signal is interrupted or
short-circuited
1.
Check to ensure probe wires and quick
disconnect are secure in control.
2.
Check probe resistance to table below. If 0
resistance is present check wiring insulation. If
infinite resistance is present check for breaks in
wiring (meter will likely read overload or very
high in the mega-ohm range).
3.
Ensure that probes are wired per the wiring
diagram provided.
4.
Replace probe if other remedies fail, or if probe
resistance deviates from “
Error! Reference
source not found.
”
Error! Reference source
not found.
E1
Defrost probe error See E0
EE
Unit parameter
reading error
Operating conditions
1.
Remedy abnormal operating conditions. The
control is rated to operate in a range of 14 to
122°F (-10 to 50°C) and less than 90%RH non-
condensing.
2.
Replace control if problem persists.
EF
Operating parameter
reading error
See EE
Table 2 - Temperature Probe Common Resistance Chart
Probe Temp
Maximum Resistance [
Ω
]
Normal Resistance [Ω]
Minimum Resistance [
Ω]
32°F (0°C)
27.83
27.28
26.74
77°F (25°C)
10.1
10
9.9
212°F (100°C)
1
0.97
0.94
ELECTRONIC CONTROL OPERATION
(Refrigerated Models Only)
This unit is equipped with an electronic temperature control. The control parameters are set at the factory
and cannot be manually changed in the field. The preset control parameters are listed on the chart in the
Settings Chart below.
Operation
The control uses two sensors, one located in the air stream and one located on the evaporator coil.
The sensor located in the air stream is referred to as the temperature control sensor. The sensor
located on the evaporator coil is referred to as the defrost probe.
The temperature control sensor is located on the plastic tub behind the evaporator coil to the left in
the cold air stream. The sensor location is critical for proper operation on the unit. Do not move or
relocate this sensor.
The coil sensor is strapped to the evaporator coil. This sensor location is critical for proper
operation of the unit. Do not move or relocate this sensor.
The temperature control is set to cut in at 39°F (3.9°C). The Temp control cuts out at 26°F (-3.3°C)
at the coldest setting “9” and 36°F (2.2°C) at the warmest setting “1”.
Summary of Contents for ITD Series
Page 14: ...14 Counter ITR60 Self Contained Counter ITRSS60 Self Contained...
Page 15: ...15 Floor ITR ITRSS 36 Self Contained...
Page 16: ...16 Floor ITR ITRSS 48 Self Contained Floor ITR60 Self Contained...
Page 17: ...17 Floor ITRSS60 Self Contained Refrigerated Remote Models...
Page 18: ...18 All ITR Counter Remote All ITR Floor Remote All ITRSS Counter Remote...
Page 19: ...19 All ITRSS Floor Remote Floor ITD ITDSS NON Refrigerated...
