Specifications

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Else If: A compressor is diagnosed as being “Stuck On”
{
HVAC mode: ("Comp. Stuck On ")
Else The control is free to select the normal heating/
cooling HVAC modes:
{
HVAC mode: ("Off ")
— The unit is off and no operating modes are active.
HVAC mode: ("Tempering Vent ")
— The economizer is at minimum vent position but
the supply air temperature has dropped below the
tempering vent set point. Gas heat is used to
temper the ventilation air.
HVAC mode: ("Tempering LoCool")
— The economizer is at minimum vent position but
the combination of the outside-air temperature and
the economizer position has dropped the supply-air
temperature below the tempering cool set point.
Gas heat is used to temper the ventilation air.
HVAC mode: ("Tempering HiCool")
— The economizer is at minimum vent position but
the combination of the outside air temperature and
the economizer position has dropped the supply air
temperature below the tempering cool set point.
Gas heat is used to temper the ventilation air.
HVAC mode: ("Vent ")
— This is a normal operation mode where no heating
or cooling is required and outside air is being
delivered to the space to control IAQ levels.
HVAC mode: ("Low Cool ")
— This is a normal cooling mode when a low cooling
demand exists.
HVAC mode: ("High Cool ")
— This is a normal cooling mode when a high
cooling demand exists.
HVAC mode: ("Low Heat ")
— This is a normal heating mode when a low
heating demand exists.
HVAC mode: ("High Heat ")
— This is a normal heating mode when a low
heating demand exists.
HVAC mode: ("Unocc. Free Cool")
— In this mode the unit will operate in cooling but
will be using the economizer for free cooling.
Entering this mode will depend on the status of the
outside air. The unit can be configured for outside
air changeover, differential dry bulb changeover,
outside air enthalpy changeover, differential
enthalpy changeover, or a custom arrangement
of enthalpy/dewpoint and dry bulb. See the
Economizer section for further details.
}
NOTE: There is also a transitional mode whereby the machine
may be waiting for relay timeguards to expire before shutting
the machine completely down:
HVAC mode: ("Shutting Down ")