PTAC Owners Manual

UNIT FEATURES
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This Premium unit has many exciting features which are different than those found on standard PTAC
models. The owner must be familiar with these features in order to fully understand the operation and
capability of the unit.
• Intelligence – Your Premium unit has an on board
computer that utilizes real time diagnostics to prolong
the life of your unit. There is an LED indicator on the
control board, behind the front panel, that will flash
an error code if the unit has detected some kind of
fault condition. In many cases, the unit will automatically
clear the fault condition and continue operating with no
interruption. In some cases, the condition cannot be cleared
and the unit will require service. In those cases, an “Fx” failure
mode will be displayed on the digital display. For a detailed list
of all error codes and “Fx” conditions, see Table 6 -Status LED
Indicator Definitions for further details.
• Memory – Your Premium unit also has memory. If power is lost, all of the control settings (setpoint,
mode, fan speed, on/off and configuration) are remembered. So when power is restored, the unit will
start back up in the mode (and configuration) it was in, when power was lost.
• Premium Sound – The unit not only doe s it have 2 fan motors and a tangential blower wheel for
optimum sound, the indoor fan will always run a minimum of 10 seconds before the compressor, to
help reduce any compressor starting noise.
• Random Compressor restart -- To help prevent power surges after a power outage (from many of
your PTACs starting at the same time), the compressor is equipped with a ″165 to 195″random
restart delay feature.Whenever the unit is plugged in, or power has been restarted, a random compressor
• Compressor Protection -- To prevent short cycling of the compressor and maximize it’s life, there is a
random start-up delay of 3 minutes on the compressor and a minimum compressor run time of 3 minutes.
• Automatic roomfreeze protection – automatically will keep the temperature in the room from getting
too cold, where water pipes might freeze. If the unit is configured for the freeze protection feature to be
active (which is the default condition), then whenever power is supplied to the unit, if the unit senses
temperature below 40°F, the fan motor and electric heater are turned on and will warm the room to 50.
If Freeze protection is not required, change the configuration switch to turn the feature off (see section
on unit configuration).
• Automatic Quick Warm-up (for heat pump models only) -- If the room temperature falls to 5°F
below the set point temperature, the reverse cycle heat is shut off and the electric strip heat is turned on.
1. Mode indicator display: When the air conditioner operates in a certain mode, the corresponding mode
indicator will be bright;
2. The ON /OFF indicator is in green when the controller is ON and in red when controller is OFF.
3. Fan speed display: When air conditioner operates at high, medium, low or auto fan speed, the
corresponding indicator will be bright.
4. Dua-8 display: Ambient temperature can also be displayed in cooling and heating modes through setting the
dial switch. Under cooling or heating mode, the dual-8 will display the set temperature (the dual-8 will display
indoor ambient temperature under fan mode).
5. If the display data has three bits, the dual-8 will display “ten’s digit”+ “unit’s digit” at first and then
display “BLANK”+ “hundred’s digit”. for one cycle, until heating is satisfied.
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