Trane Technologies BAYSTAT152A, Installation, Operation And Maintenance Manual

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52 BAS-SVX44C-EN
Troubleshooting
Use the following table to diagnose and resolve problems.
Table 12. Troubleshooting
Problem Solution
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 outside of the measurable range or there is an error with the humidity sensor.
• For internal humidity sensor, try a power cycle to see if the sensor recovers.
• For external humidity sensor, check Hs and Hp terminals and/or ensure that the remote humidity sensor is not damaged or malfunctioning.
Replace if necessary.
• If there is no recovery, have the thermostat serviced or replaced by a qualified Trane supplier.
Error code E4 - Input
voltage out of range • Check the input voltage to the thermostat. It must be within the range of 18 Vac to 32 Vac RMS.
Error codes E3 or E7 • Cycle the power to the thermostat.
• If it does not recover to normal operation, have it serviced or replaced by a qualified Trane supplier.
Error code E5 - RTC (Real
Time Clock) • Set the clock from the Home screen.
• Power cycle the unit.
• If E5 remains, have the thermostat serviced or replaced by a qualified Trane supplier.
Blank display • Check the power supply.
• If the power supply is ok, have the thermostat serviced or replaced by a qualified Trane supplier.
Icons display missing or
only partially showing • Run Test #7 (refer to the section, “System Tests,” p. 21 ) to view odd, even, and full icon segment display.
• Power cycle the thermostat.
• If problem persists, have the thermostat serviced or replaced by a qualified Trane supplier.
Erratic display appearance
or contrast • Check the power supply (24 Vac nominal) and frequency setting (Configuration Option Number 0170).
• Cycle the power to the thermostat.
• After verifying the power supply and frequency setting, have the thermostat serviced or replaced by a qualified Trane supplier.
Display screen does not
respond • Make sure the thermostat modes are not locked (refer to the section, “System Lockout,” p. 42 ).
• Cycle the power to the thermostat.
• Run Test #8 to confirm touch response.
• If the screen is not locked and cycling the power do not solve the problem, have the thermostat serviced or replaced by a qualified Trane
supplier.
“--F” or “--C” flashes • Temperature is outside of the measurable range. The temperature display should return when the temperature is within the measurable
range.
• For Remote Temperature Reading; if temperature is within measurable range (refer to Table 11, p. 50 ) then check/replace the remote
temperature sensor.
• For Local Temperature Reading; if temperature is within measurable range, then have the thermostat serviced or replaced by a qualified
Trane supplier.
Fan settings are not visible • Check the system status. If the system is OFF , the fan settings will not appear.
• Check the Configuration Option Numbers 0130 and 0151 to verify that the fan is enabled.
Relays do not turn ON • Go to Test Modes 1–6 (refer to the section, “System Tests,” p. 21 ) to toggle the relay(s) in question. If the relay(s) do not toggle in test mode,
then have the thermostat serviced or replaced by a qualified Trane supplier.