ELECTRONIC DEFROST TIMER (when equipped)
THUMBSCREW
LID
CONTROL BOX
Fig. 11
Fig. 12
If your freezer is equipped with an electronic Defrost Timer, it is located in a control box behind the trim rail at the top of the
The Defrost Timer's clock is operating from the backup power supply (battery) during shipping and before installation. Once the freezer is plugged in, the Defrost Timer operates off of the AC power supply; the battery is only used during a power interruption or outage. This battery is a permanent type that is not replaceable except by replacement of the defrost timer itself. For additional information on behavior of the defrost timer if the battery loses power, refer to page 11. When the AC power is plugged in, the defrost time clock automatically switches the battery to a standby condition.
When the Freezer is connected to the AC electrical power supply, the SET CLOCK light on the Defrost Timer (Fig. 12) blinks rapidly to indicate that the Defrost Timer is in normal Operation Mode.
The Defrost Time Clock is set at the factory to the current time-
The backup power supply (battery) maintains the correct
PROGRAMMING THE ELECTRONIC DEFROST TIMER
Use a small probe such as a pen, pencil or screwdriver to move the switches during programming. Switches are OFF when the tab is left, ON when tab is moved to the right.
Before programming, if the initial switch settings are not all off (Fig. 12), make a record of the current switch settings on a piece of paper; this indicates the current defrost schedule. Then slide all 24 switches to the left or OFF position (Fig. 12).
During programming, all settings must be completed within 4 minutes or the timer will return to normal Operation Mode. Once programming is done, restore the previous defrost schedule by returning the switches to the same positions noted on your record.
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