3
center so that the pegs alternate with 2 toward the
center, then 2 out from the center, all the way
around the dial except for the section now with 6
pegs out in a row (see Fig. 1).
5. Replace the cover.
Change the timer pegs back to the original pattern for
use above 50
°
F.
Figure 1: Defrost Control Timer
2.10 Low Pressure Control
If the low side refrigerant pressure drops to 15 PSIG,
the low pressure control opens and shuts off the
compressor and blower. It is an automatically reset
control. Its primary function is to prevent damage to the
compressor if a leak develops in the refrigeration
system. It may also open if the unit is A) used in a cool
area (below 50
°
F) and the defrost timer is not adjusted
(see Sec. 2.10) or B) stored where it is below 40
°
F and
then started. Under these conditions, the unit will
restart within several minutes. Until the unit warms up,
it may cycle several times.
