Trane Baysens019c Manual ^new^ Page

If you suspect the sensor is defective, verify the voltage between terminals 11 and 12. It should read between 28 and 32 VDC. If the sensor is properly powered but not communicating, it may need to be replaced.

After verifying all wiring is correct, turn on unit power. The ZSM will start in the Normal Run State using factory default settings. trane baysens019c manual

Understanding the buttons on the BAYSENS019C interface is essential for proper configuration. If you suspect the sensor is defective, verify

| | Condition | |----------|----------------| | HEAT | Solid = heating mode active; Flashing = heat failure | | COOL | Solid = cooling mode active; Flashing = cool failure | | ON | Colon (:) flashes = system on; Colon steady = system off | | SERVICE | Solid = service required; Flashing = fan failure | | TEST | Unit is in test mode | | CHECK FILTER | Accumulated runtime exceeds the interval set in Option 12; press ERASE to reset | After verifying all wiring is correct, turn on unit power

"The 019C is tricky," Miller said, the sound of a coffee mug clinking in the background. "The dip switches on the back define the control logic. If someone messed with the configuration, it won't communicate with the RTU. Or, it could be the discharge air sensor offset."

: In the event of a power outage, your program settings are retained in permanent memory, though the clock and day may require a manual reset after extended downtime.

The BAYSENS019C relies on low-voltage connections to communicate with the main HVAC controller board. Terminal Label Function Description R 24 VAC Power Supply (Hot) C 24 VAC Common Y1 / Y2 Cooling Stages (First / Second Stage) W1 / W2 Heating Stages (First / Second Stage) G Indoor Fan / Blower Relay O / B Reversing Valve (For Heat Pump configurations) T1 / T2 Remote Temperature Sensor Connections (Optional)