62-11389
4
−
16
14.High Speed Pulldown.
When the set point is in the perishable range, and the
unit is operating in Continuous Run, and the High Speed
Pulldown configuration is set for YES, then the com-
pressor will operate with both unloaders de-energized
(6-cylinder loaded operation) until the refrigerated con-
tainer temperature is 0.36
°
F (0.2
°
C) above set point.
4.8.5 Defrost Safety Override
When in defrost and the return air temperature rises
to 95
°
F (35
°
C) regardless of the temperature of the
DTT, the unit will go into low speed and all electric
heaters will be de-energized. The unit will remain in
defrost with the heaters de-energized until the return
air temperature is less than 90
°
F (32
°
C).
In addition, when in defrost and the supply air temper-
ature rises above 135
°
F (45
°
C) regardless of the tem-
perature of the DTT, the unit will go into low speed and
all electric heaters will be de-energized. The unit will
remain in defrost with the heaters de-energized until
the supply air temperature is less than 108
°
F (42
°
C).
