
Unit Operation
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HIGH SPEED LOCK-OUT Key
If the unit is turned on, pressing the HIGH SPEED LOCK-OUT Key will activate High Speed
Lock-Out. The unit will switch to low speed operation and the amber LED indicator will glow. No
further high speed operation is allowed until this feature is turned off. Unit may automatically return
to high speed operation after a programmed time limit if timer feature is enabled.This feature is
typically used in noise sensitive areas to reduce unit noise.
NOTE: The HIGH SPEED LOCK-OUT Key is only used when the unit is operating in Diesel Mode. The
HIGH SPEED LOCK-OUT Key does not have any effect in Electric Mode operation.
DEFROST Key
If the unit is turned on, pressing the DEFROST Key will initiate a manual defrost cycle if conditions
allow. If the evaporator coil temperature less than 45 F (7 C) the unit will enter a defrost cycle. The
amber LED will flash while the defrost cycle is initialized and will glow during the defrost cycle. The
defrost cycle will terminate automatically and the amber LED will turn off when the evaporator coil
temperature is greater than 52 F (11 C). To manually terminate a defrost cycle turn the unit off and
back on.
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