Trane Touchscreen Programmable Thermostat User Manual

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Other Thermostat Functions
Table 9. Remote humidity sensor: Current/voltage versus humidity
System Lockout
The thermostat can be locked out to prevent unauthorized personnel from changing settings. A
lockout will disable changes to the following modes: System, Fan, Scheduling, Time, and TOV. If
a change attempt is made, the lock icon ( ) will blink (1 Hz, 20/80%) for 10 seconds on the LCD
display and then go solid again.
To lock the thermostat:
 Simultaneously touch and hold both setpoint...

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Temperature Cycle Control
The heat and cool cycling rate, expressed in cycles per hour (CPH), indicates how often heating or
cooling system is turned on when temperature is within the temperature differential from the
setpoint (which is 1°F [0.5°C]). There are ten options (1–10) for heat stages and five options (1–5)
for cool stages. The number selected is the maximum number of times the stage is cycled in 1 hour.
For example, when the system is set to 5 CPH, it runs at 12-minute cycles...

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Temperature Cycle Control
Figure 21. Auto heat and cool systems
Figure 22. Auto 2/heat and 2/cool systems
General Notes:
 The number of cooling or heating cycles are fixed according to CPH setting value.
 The duty cycle is varied during the cycling control.
 There are five (5) options for cooling CPH selection and ten (10) options for heating CPH
selection.
 The cycles per hour for first-stage compressor (Option Number 0160) is used for the first stage of heat pump systems or the first...

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Other Functional Components
Figure 23. Auto 3/heat and 2/cool systems
Other Functional Components
This section provides additional information for understanding thermostat operation or
programming. Some of the following sections refer to specific Option Numbers that are listed in
Table 7, p. 24 .
Sleep Mode
Sleep mode places the CPU into a low powerstate when the thermostat is inactive.
Note: Sleep
 mode is not implemented, but is noted here for future reference.
Changeover Operation
When...

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Other Functional Components
Extension of Fan-on Time
The system fan-on time is able to be extended for either or both cooling or heating mode. For
cooling, the extension time is 90 seconds and for heating it is 40 seconds (refer to 0270 and 0271).
Economizer/Time of Day (TOD)
You can set the Economizer or TOD mode using Option Number #150 to one of two settings:
Economizer Mode- TerminalAis energized with the thermostat in Occupied mode,
Unoccupied mode with a call for cool, or a...

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Other Functional Components
Temperature Display Offset
The offset parameter appliesonlyto theLocal Temperature Display(when Configuration Option
Number 0210 is set to 0, 1, or 2) or to theIndoor Remote Temperature Display(when
Configuration Option Number 0210 is set to 3). Itdoes notapply to theOutdoor Remote
Temperature Display(when Configuration Option Number 0210 is set to either 1 or 2). The offset
range is -3°F to 3°F (-1.5°C to 1.5°C) [Refer to 0210 and 0260]. When Configuration...

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Other Functional Components
permanent memory, the factory default preset parameters are used and are stored to permanent
memory.
The entire permanent memory data can be reset manually back to factory default data using
Configuration Option Number 0300.
Note:In instances where there is a loss of two (2) power cycles, the firmware limits the EEPROM
write to five (5) writes of data for 24 hours. Thereafter, the EEPROM write capability is
disabled. After 24 hours, the counter resets and...

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Error Codes and Exceptions
Error Codes
Error codes indicate a possible need for technical assistance. Error codes display where the time
of day is located. When an error occurs, the error code will blink first (for 3 seconds) and then blink
the time of day (for 1 second) and back to the error code in 4-second intervals.
During normal operation, the errors will be displayed in the following priority:
E4 > E0 > E1 > E3 > E5 > E7; only the highest priority code will display. If there are...

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Error Codes and Exceptions
Exceptions
There are exceptions to be noted when using the thermostat.These exceptions are:
 If the indoor or outdoor temperature is lower or higher than the measuring range, the
temperature display will blink either“--F”(Fahrenheit) or“--C”(Celsius) at 1.5 secondsONand
0.5 secondsOFF. All other outputs remain functional. Display range is -45°F to 199°F (-42.8°C
to 92.8°C))
 If the system fails to access EEPROM for 10 minutes, the system will blink withE3(3s=...

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Troubleshooting
Use the following table to diagnose and resolve problems.
Table 12.Troubleshooting
ProblemSolution
Error code E0 - 
Thermistor error.• For configuration option #210 set to 1, 2, 3, or 4: 
Check the sensor terminals S1 and S2 for secure connection. If wires are securely connected, try replacing the 
sensor. If the error persists, have the thermostat serviced or replaced by a qualified Trane supplier.
Error code E1 or “--” 
flashing in humidity 
display• Humidity reading is...