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TM 10-4110-262-13&P
0029 00
Defrost Maintenance
The Defrost timer has two DIP switches and a red, round selector. The timer is set from factory at 4 hours. To
change the setting of the Defrost timer, proceed as follows:
Selector
DIP
Switches
The following table can be found on the printed circuit board:
Timing Table
Scale
A
B
0.25 2.5
0.25 to 2.5 minutes
1 10
1 to 10 minutes
8 80
8 to 80 minutes
64 640
1 to 10 hours
1. Choose a range from the timing table by setting the A and B selectors to the desired position. For example,
setting the A and B selectors to the positions A: ↓ and B: ↓ selects a range of time between 64 and 640 minutes
(1 to 10 hours).
2. Set the red selector to multiply the minimum value of the chosen range by the value at which it is pointing. If the
selector points to position 2: 2 * 64 = 128 minutes (approximately 2 hours). If the selector points to position
4: 4 * 64 = 256 minutes (approximately 4 hours).
0029 00-11

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