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System Protection
8.10 Sensor Failure Default Operation
8.11 Exiting Active Protection Lock-Out Mode
If the controls sense an externally connected sensor
has failed, the system will enter a fail safe operating
mode and will continue to condition the space
until the sensor can be replaced. A fault code will
be displayed on the EcoNet
TM
Control Center and
Universal Outdoor Control identifying which sensor
has failed. See the table below for the default
operation for a sensor failure.
Exiting an Active Protection Lock-Out mode can
be accomplished by disconnecting electrical
power to both the indoor and outdoor units for 1
minute and then restoring power. Keep in mind
there was a reason for the lock-out, so the fault
code on the Universal Outdoor Control (UODC) or
EcoNet
TM
Control Center should be read to assist
with diagnosing the root cause of the lock-out and
corrective action should be taken to prevent the
system from repeating the lock-out.
8.0 ACTIVE SYSTEM PROTECTION FEATURES
FAILED COMPONENT FUNCTION DEFAULT OPERATION
Outdoor Sensor (OAT)
Low Ambient Cooling No Low Ambient function
Defrost Defrost will be initiated based on coil temperature and time
One minute fan off delay on COOL mode
No delay functions if failure is open or short. Continue function for a thermistor
range error.
PWM Shift above 104°F [40°C] Shift will not occur
Coil Sensor
Defrost Initiate and Terminate Defrost will occur at each time interval (34 mins), but will terminate after 5 minutes
Heating Superheat Calculation Unit Shuts Down
Low Ambient Cooling No function
Liquid Pressure Transducer
Subcooling Calculation Econet - Display alert, Continue operation
Saturated Liquid Temp Calculation Continue to operate, but system speed limited to nominal capacity
Suction Pressure Transducer Saturated Suction Temp Calculation Unit Shuts Down
Suction Temperature Sensor Heating Superheat Calculation Unit Shuts Down
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