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MAINTENANCE AND TROUBLESHOOTING
THERMOSTAT OPERATION
Problem - nC is displayed on thermostat.
nC is displayed on the thermostat when the thermostat loses
communication with the wiring hub. If the message continues
to be displayed, turn the system off and check the wiring
between the thermostat and wiring hub.
DAMPER OPERATION
Problem - No airflow to the sleeping area AND living
area registers
Turn system off immediately. Both dampers may be connected
backwards at the wiring hub or at the damper actuator (causing
dampers to close rather than open).
Problem - No airflow to the sleeping area OR living
area registers
Turn system off. One of the dampers may be connected
backwards at the wiring hub or at the damper actuator
(causing a damper to close rather than open).
Problem - Limited airflow to the sleeping area OR living
area registers
Turn system off. The damper blade movement may be inhibited.
To verify a damper blade moves freely, remove the two
mounting screws on the actuator. Do not disconnect the plug
and play cables. Verify the damper blade spins 360 . If the blade
spins freely, reattach the actuator to the damper by aligning the
keyed shaft. If the blade does not spin freely, examine the
damper for obstruction or damage and replace the damper if
necessary.
Problem - When directing airflow to the sleeping area, the
airflow is actually directed to the living area, and when
directing the airflow to the living area, the airflow is actually
directed to the sleeping area.
Turn system off. Check if the dampers are switched (sleeping
area damper is connected to the living area connector and the
living area damper is connected to the sleeping area connector.)
COMFORT CONCERNS
Problem - Downstairs bedroom is too cold or too hot at night.
The Nighttime Airflow Control option directs more airflow to the
sleeping area and less airflow to the unoccupied living area. If
the downstairs bedroom is on the same HVAC trunk as the
living area, the downstairs bedroom may become uncomfortable
at night. Turn off the Nighttime Airflow Control option using the
User Options.
SENSOR INSTALLATION
Problem - nS message on thermostat.
For wired sensors, check that the sensor is wired correctly.
Check for a short in the sensor wiring. For wireless sensors,
check that batteries are installed in the sensor and that the
sensor numbers are set correctly.
Problem - Err 01 or Err 02 message on thermostat.
Check the batteries in the wireless sensor and that the
sensor numbers are set correctly.
Problem - Sleeping area temperature reading very high or
very low.
Check that the correct sensor(s) have been used. One
wired TS51 sensor is used in a single sensor installation.
Two TS52 sensors are used in a dual sensor installation.
o
Problem - The room temperature on the thermostat seems
too high or too low.
The thermostat is factory calibrated within 1 degree.
However, if a homeowner finds the temperature "feels"
too high or too low, the thermostat can be calibrated to
what the homeowner feels is the correct temperature using
Installer option 15 for the living area and option 16 for
the sleeping area.
page 14 of 16
P/N 780101708 2/18 Rev A
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