What to do if the LED is always on on Trane Controller?
If the LED on your Trane Controller stays on even when you first turn it on, it could be because someone is pressing the Service push button or the controller has failed. You can use the Rover service tool to restore the unit to normal operation.
General| Brand | Trane |
|---|---|
| Model | Tracer ZN.520 |
| Category | Controller |
| Language | English |
Lists Trane products compatible with the ZN.520 controller.
Details supported products from the Waco, Texas facility.
Explains the function and terminals for binary inputs.
Describes the function and terminal configurations for binary outputs.
Details the analog inputs, their functions, and ranges.
Provides examples of binary output usage in different configurations.
Details configuration and use of generic binary output and baseboard heat.
Explains manual output test and water valve override functions.
Notes that analog output capability is not included.
Describes the condensate overflow detection function and its diagnostics.
Explains low coil temperature detection and its diagnostics.
Describes fan status monitoring and potential diagnostics.
Explains the use of the occupancy binary input for controlling unit occupancy.
Details the defrost sensing mechanism for DX cooling applications.
Summarizes all analog input types and their applications.
Explains the space temperature analog input and its operation.
Describes the local setpoint input and how it's used.
Explains the fan mode input and how it determines fan speed.
Details the entering water temperature input and its role in control.
Explains the discharge air temperature input and its use in control.
Describes the outdoor air temperature input and its function.
Explains the use of AI 3 as a generic temperature input.
Details the functions available for the universal 4-20mA input.
Explains the generic 4-20mA input for Tracer Summit.
Describes the use of relative humidity input for dehumidification.
Explains the CO2 input for Tracer Summit applications.
Details how the zone sensor measures space temperature.
Explains setpoint adjustment using zone sensor controls.
Explains the calculation of absolute setpoint offset.
Describes how the controller determines effective setpoints.
Explains the fan switch input and its configuration.
Describes the function of the On/Cancel buttons on the zone sensor.
Explains the use of the communication jack.
Details the typical wiring connections for the zone sensor.
Illustrates the communication wiring for the controller.
Details fan operation for different configurations.
Explains occupancy modes and how they affect operation.
Explains cascade control for zone temperature management.
Details the controller's operation during cooling and heating modes.
Explains operation of valves, dampers, and other components.
Covers dehumidification, freeze avoidance, and other modes.
Lists parameters that can be configured.
Specifies the types of units the controller supports.
Lists available cooling sources.
Lists available heating sources.
Details standalone controller operation and configuration.
Explains peer-to-peer communication between controllers.
Details the setup for master/slave peer-to-peer applications.
Explains the meaning of the controller's LEDs.
Details the manual output test procedure.
Lists and explains various controller diagnostics.
Lists methods for resetting controller diagnostics.
Addresses common issues with fan output operation.
Addresses common issues with valve operation.
Addresses common issues with DX or electric outputs.
Addresses common issues with outdoor air damper operation.
Table showing resistance values for setpoint adjustment.
Table of resistance values for 10 kΩ thermistors.
Details binary input and output configurations.
Table showing unit operation based on various inputs.
Lists SNVT types for inputs/outputs and configuration properties.
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