9
NOTE: While in any of the controller mode setups
(temp set, units or calibration offset), the controller will
wait 15 seconds for a value to be entered. If there is no
keypad operation within the 15-second time window,
control will automatically revert to the temperature dis-
play mode and the Mode LED will turn off.
Hold-Off Time
Following the offset menu is the hold-off (Ho) menu. The
display will momentarily flash “Ho”, followed by a number.
The number shown is the delay time in minutes between
compressor activations. Use the UP/DOWN keypads to
change the value.
Increasing the hold-off time will reduce the number of com-
pressor activations, thus decreasing the amount of ice build
up on the evaporator and reduce the defrost time.
NOTE: Increasing the Hold-Off time should never substi-
tute the automatic defrost cycle.
Temperature Digression
By pressing the Increase keypad, the display will show the
warmest temperature recorded since the unit was ener-
gized or the digression values were reset. Pressing the
Decrease keypad will display the coldest temperature
recorded since the unit was energized or the digression val-
ues were reset.
To reset the temperature digression values, simply press
the Increase and Decrease keypads at the same time. The
display will show Clr, indicating the controller will begin
recording new warm and cold digressions once more.
These values are also reset when power is turned off.
Automatic Defrost
All freezers are equipped with automatic defrost timers.
The timers are factory set to complete four defrost cycles
every 24 hour period. Each defrost cycle lasts approxi-
mately 40 minutes. During a defrost cycle, the evaporator
heaters are energized and the chamber temperature
increases. Also, the compressor motor is held off, even
though the Cool LED is illuminated.
O
PERATION
Caution
INCREASING the offset value
DECREASES the temperature at
which the system controls.