Trane Tracer, ZN510 Controller manual Outdoor air damper stays closed

Page 26

Troubleshooting

Questionable Unit

Operation

Table 16: Outdoor air damper stays closed

Probable Cause

Explanation

 

 

 

The controller opens and closes the outdoor air damper based on the controller’s

Normal operation.

occupancy mode and fan status. Normally, the outdoor air damper is open

during occupied mode when the fan is running and closed during unoccupied

 

 

mode. Refer to the outdoor air damper section on page 8.

 

 

 

The controller includes both a morning warm-up and cool down sequence to

Warm up and cool down.

keep the outdoor air damper closed during the transition from unoccupied to

occupied. This is an attempt to bring the space under control as quickly as

 

 

possible.

 

 

 

The desired operating mode (such as off, heat and cool) can be communicated to

Requested mode off.

the controller. When off is communicated to the controller, the unit closes the

 

outside air damper.

 

 

 

The controller includes a manual output test sequence that may be used to verify

Manual output test.

output operation and associated output wiring. However, based on the current

step in the test sequence, the outdoor air damper may not be open. Refer to the

 

 

manual output overrides on page 9.

 

 

 

A specific list o f diagnostics affects outdoor air damper operation, depending

Diagnostic present.

whether the unit is configured as heat pump. For more information, see the

 

Diagnostics section on page 27.

 

 

 

The controller must be properly configured based on the actual installed end

Unit configuration.

devices and application. When the unit configuration does not match the actual

 

end device, the outdoor air damper may not work correctly.

 

 

 

If the controller does not have power, the compressor does not operate. For the

No power to the controller.

ZN510 controller to operate normally, a voltage input of 24 VAC must be applied.

When the green LED is off continuously, the controller does not have sufficient

 

 

power or has failed.

 

 

Unit wiring.

The wiring between the controller outputs and the outdoor air damper must be

present and correct for normal outdoor air damper operation.

 

 

 

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Contents WSHP-IOP-2 1998, American Standard Company Installation, OperationLiterature History Table of Contents Zone Sensor Placement Start-up ProcedureInstallation of New Units Power Up Sequence Power Up SequenceUnit Identification Tag Unit Identification TagUnit Operation CommunicationPosition Damper Actuator or Generic Binary Output PowerBinary Outputs Output Overrides Binary input configurationsBinary Input Description Configuratio Contact Closure Open Condensate Overflow OccupancyGeneric Binary Input High and Low Pressure SwitchesDescription Communicated Request Hardwired State Result Analog Inputs 24 VAC ComprCompr Binary Outputs Discharge Air Sensor Leaving Water Sensor CircuitOccupied setpoints Fan Mode InputLocal Setpoint Fan Off Delay Filter Maintenance TimerZone Sensor Internal and External Setpoint AdjustmentZone Sensor Setpoint OperationZone Sensor Features Fan Switch Optional Communication JackZone Sensor Specifications Heating or Cooling Operation Heating or Cooling Control Mode OperationCompressor Minimum ON/OFF Timers Capacity Unit Between 100% 50%Single and Dual Compressor Operation Morning Warm UpData Sharing Master ControllerConfiguration Yellow Service LED TroubleshootingRed Service LED Green Status LEDTesting the Heat Pump Configurations Manual Output Testing the HeatPump Configurations Pump Operation for Systems with ZN510 Loop ControllerNicated information Questionable Unit OperationFan output does not energize Wait time expiresCompressors not running Outdoor air damper stays openOutdoor air damper stays closed Diagnostic Fan Other Outputs DiagnosticsZN510 controller diagnostics Cycling Power Translating Multiple DiagnosticsResetting Diagnostics Rover Service ToolWiring Diagram Wiring Diagram Operating Environment 32 to 140 F 0 to 60 C Hardware SpecificationsSpecifications Board Dimensions Agency ListingsBinary Output J1-1 12 VA VAC RMS typical J1-2 J1-4 Binary InputsDescription Terminals Function Binary Output J1-5 12 VA VAC RMS typical J1-6 J1-7