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1.2 features
Unit Features
The PTAC has many features, some of which are different than those found on conventional PTAC units. The servicer must be
familiar with these features in order to
properly service the unit.
• Highly featured Micom controls using IIR (infinite impulse response)
IIR function can make Micom controls maximize and keep the comfort conditions to sense the small changes in temperature
per second.
• Compressor Restart delay
This feature extends the overall life of compressor by preventing the short-cycling of the air-conditioner. When the
compressor restarts, LG PTAC is designed to give a minimum of three minutes to have a time of equalizing the refrigerant
pressures for optimizing cycling.
• Fan-Only Setting - High/Low
The unit provides the function of selecting the either High or Low speed for Fan-Only operation.
• Indoor Fan Speed Selections - High/Low
The unit is operated in High-Heat or Low-Heat or High Cool or Low Cool.
• Two Fan motors
The unit has two fan motors to provide the occupants with the quiet environment to enjoy the peaceful life and maximum
operating efficiency.
• LED Diagnostics
All units have this feature indicating the problem when the unit is not operating properly with easy -to-read diagnostics. For
example, 1 blink every 2 seconds indicates the compressor failure.
• Indoor Filters
The unit uses the two indoor filters easily slide in and out. The filters may be cleaned by washing and brushing without
removing the front grille.
• Rotary Compressor
The unit uses the rotary compressor for the quiet, reliable operation and prolong life.
• 2 Position Discharge Grille
The discharge grille can provide air flows upward at an angle of 40 off vertical or 80 15 degree off vertical. An angle is
changed by removing the front grille and 4screws that fasten the discharge grille to the front grille to rotate an alternate
position of the louvers.
• Indoor Room Freeze Protection
When the unit senses the room temperature falls to 40˚F below, the unit activates the fan motor and either the electric
resistance heater or the hydronic heater to prevent pipes or fixtures from freezing. This also overrides front desk control of the
unit mounted or wall mounted controls.
• Door Switch/Occupancy Sensor
The unit is capable of accommodating a field installed door switch and occupancy sensor to operate the energy management
feature. For additional information, refer to the Unit Operation section.
• Compressor Overload Protection
This feature prevents the damage of the compressor by sensing the indoor tube temperature in heating. If the indoor
temperature is over 130˚F, the outdoor fan will be switched off and on below 120˚F.
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