Clock; Operational And Connection Information; Error Codes - Carrier Comfort Serie Manual De Instalación

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Factory Configuration Mode
Press zone (
) and mode (M) buttons at a time for 10
seconds to enter into the factory configuration mode.
When this setting is first selected, 799 shall be displayed
in the temperature-zone and an initial value of 10 shall be
displayed in the time-zone of the display. Press and hold
the down button. When the counter reaches zero, "Fd" shall

Clock

The clock will continue to operate for 8 hours while power
is removed.

Operational and connection information

Error Codes

Room Air Temperature Sensor Failure:
If the sensor used to sense room air temperature reads
less than -45°C or greater than 65°C, it shall be considered
failed. If it has been flagged as failed, the room temperature
displays will show "--".
Humidity Sensor Failure:
If the sensor used to sense room Humidity reads less than
0 HR% or greater than 99 HR%, it shall be considered failed.
If it has been flagged as failed, the Humidity displays will
show "--".
EEPROM Failure:
If the thermostat non-volatile memory (EEPROM) has failed,
an "E4" error shall be shown in the room air temperature
display. When this error is present and power is cycled to
the thermostat all of the installer configurations, program
schedule settings
and user settings will be factory default values. This may
result in incorrect equipment operation. There is no field fix
for this error. The thermostat must be replaced.
16
be displayed in the temperature-zone of the display. This
represents factory defaults are in progress. Upon successful
completion of restoring
defaults to EEPROM, the NUI shall then force a reset.
Communication Failure
If the NUI does not receive CCN communications from the
main user interface for 60 seconds, the display will show
"E3" error code in the Temperature display area and '-'in all
the Time Display Area. Under this condition the outside
temperature will be blanked.
"E3" error code will be displayed once and the other
functionality will remain same. If this happens then check
the communication cable between NUI and outdoor unit.

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33aw-cs1

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