True GDM-49-HC-TSL01 Installation Manual page 24

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LAE Control
INITIATE A MANUAL DEFROST:
May need to unlock control.
WHY: A one time additional defrost may be necessary to clear accumulated frost / ice from evaporator coil.
HOW TO INITIATE A MANUAL DEFROST:
The method to initiate a manual defrost is determined by the Defrost Mode Parameter "DTM" preprogrammed in the controller.
REGULAR TIME DEFROST (TIM)
If controller is preprogrammed for "TIM", press and release the Manual Defrost button
REAL TIME CLOCK (RTC)
If controller is preprogrammed for "RTC" press the and hold the Manual Defrost button
Release the Manual Defrost button
NOTE: Defrost will only terminate once a specific preset temperature or a preset time duration is reached.
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and then press and hold for an additional 5 seconds until "dEF" appears.
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Info / Set Point Manual Defrost /
Button Down Button
Manual Activation Stand-By
Up Button
until "dEF" appears.
for 5 seconds until "dh1" appears.
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Button