Part number 20220, Rev 0
7
NORMAL MODE
In normal operation, the controller will display the current temperature inside the unit.
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The HI/LO icon indicates that the HI/LO setpoints are being displayed
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The Cooling icon indicates that the compressor is on, cooling the unit.
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The Defrosting icon indicates that the unit is in manual defrost.
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Pressing the “SET” button will display the low end setpoint of the control cycle. This is
the temperature where the compressor will turn off. Pressing the RAISE or LOWER
buttons while the SET temperature is displayed will cause the controller to raise or
lower the SET temp.
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Pressing HI/LO will display the highest and lowest temperatures recorded since the last
time the memory was reset. Press and hold HI/LO for 6 seconds to reset the memory.
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Pressing HI/LO and SET together for 6 seconds will place the unit in a defrost cycle for 25
minutes. Pressing HI/LO and SET together again for 6 seconds (or waiting 25 minutes)
will take the unit out of the defrost cycle.
PROGRAM MODE
Note: Most of the functions in Program Mode are for factory use only and
should not be adjusted. This procedure will show you how to adjust a few user
adjustable settings.
Differential temperature - Press and hold SET for 6 seconds to enter Program Mode. Once “E1”
is displayed, press SET twice more until “E3” is displayed. This is the temperature differential
(DIFF) setpoint and sets the number of degrees above the SET temp when the compressor
comes on and begins to cool the unit. So, SET temp + DIFF temp = COMPRESSOR ON temp .Use
RAISE and LOWER to adjust the DIFF temp.
Alarm Delay Time - Press and hold SET for 6 seconds to enter Program Mode. Once “E1” is
displayed, press SET 10 more times until “C4” is displayed. Use the RAISE and LOWER to adjust
the alarm delay time from 0 to 60 minutes. The default is 10 minutes.
Celsius vs. Fahrenheit display – Press and hold SET for 6 seconds to enter Program Mode. Once
“E1” is displayed, press SET 11 more times until “F_C” is displayed.
Pressing the RAISE or
LOWER arrow will toggle the setting between F for Fahrenheit and C for Celsius
display.
