Troubleshooting Table - Trane Thermostats Installation And Operation Manual

Troubleshooting Table

Use
Table 12. Troubleshooting
Problem
Error code E0 -
Thermistor error.
Error code E4 - Input
voltage out of range
Error codes E3, E5, or E7
Blank display
Erratic display
appearance or contrast
Buttons do not respond
"--F" or "--C" flashes
Fan settings are not
visible
BAS-SVX36C-EN
Table 12 to diagnose and solve problems you may encounter.
Solution
• For non-programmable thermostats and programmable thermostats set to use internal
temperature sensor (configuration option #210 set to 0, 1, or 2):
Thermistor is defective or local temperature is out of range. Replace or repair
thermostat through a qualified Trane supplier.
• For programmable thermostats with configuration option #210 set to 3:
Check the sensor terminals S1 and S2 for secure connection. If wires are securely
connected, try replacing the sensor.
• Check the input voltage to the thermostat. It must be within the range of 18Vac to 32
Vac rms.
• Cycle the power to the thermostat.
• If it does not recover to normal operation, have it serviced or replaced by a qualified
Trane supplier.
• Check the power supply.
• If the power supply is ok, have the thermostat serviced or replaced by a qualified Trane
supplier.
• Check the power supply.
• Check the frequency configuration (Configuration option #210 for the programmable
thermostat or #11 for non-programmable thermostats) to make sure that you are using
the correct frequency setting for your power supply.
• If the power supply and frequency setting are ok, have the thermostat serviced or
replaced by a qualified Trane supplier.
• Make sure the thermostat modes are not locked. See
p. 40.
• Cycle the power to the thermostat.
• If the modes are not locked and cycling the power do not solve the problem, have the
thermostat serviced or replaced by a qualified Trane supplier.
• Temperature is outside of the measurable range. The temperature reading should be
correct when the temperature is within the measurable range.
• Check the system status. If the status is Off, the fan settings will not appear.
• Check the configuration options to verify that the fan is enabled:
For programmable thermostats, check options 0130 and 0151;
For non-programmable thermostats, check options 01 and 03.
Troubleshooting
"Locking or Unlocking Modes,"
47