Trane ZN.520, Tracer Unit Ventilator manual Diagnostics

Page 58

Troubleshooting

Diagnostics

Table 28: Tracer™ ZN.520 Unit Controller diagnostics

Diagnostic

Unit Response

Latching/non-

Reset

latching

 

 

 

 

 

 

 

 

 

 

 

 

Fan—OFF

 

Auto reset once within 24hrs. If

 

Valves—OPEN

 

 

 

safety generates a diagnostic

Low Coil Temperature

Outdoor air damper—CLOSED

 

Latching

more than once a communi-

Detect2

Face bypass damper—BYPASS

 

cated or manual reset will be

 

DX/electric heat—OFF

 

 

 

necessary.

 

Baseboard heat—OFF

 

 

 

 

 

 

 

 

 

Fan—OFF

 

 

 

Valves—CLOSED

 

 

Low Air Flow - Fan Failure2

Outdoor air damper—CLOSED

Latching

Communicated or manual reset

Face bypass damper—BYPASS

 

 

 

 

DX/electric heat—OFF

 

 

 

Baseboard heat—OFF

 

 

 

 

 

 

 

Fan—OFF

 

 

 

Valves—CLOSED

 

 

Space Temperature

Outdoor air damper—CLOSED

Non-latching

Communicated or manual reset

Failure2,4

Face bypass damper—BYPASS

 

 

 

DX/electric heat—OFF

 

 

 

Baseboard heat—OFF

 

 

 

 

 

 

 

Fan—ENABLED

 

 

 

Valves—ENABLED3

 

 

Entering Water Temp

Outdoor air damper—ENABLED3

Non-latching

Communicated or manual reset

Failure4

Face bypass damper—ENABLED3

 

 

 

DX/electric heat—ENABLED3

 

 

 

Baseboard heat—OFF

 

 

 

 

 

 

 

Fan—OFF

 

Auto reset once within 24hrs. If

 

Valves—OPEN

 

 

 

safety generates a diagnostic

 

Outdoor air damper—CLOSED

 

Discharge Air Temp Limit2

Latching

more than once a communi-

Face bypass damper—BYPASS

 

 

cated or manual reset will be

 

DX/electric heat—OFF

 

 

 

necessary.

 

Baseboard heat—OFF

 

 

 

 

 

 

 

 

 

Fan—OFF

 

 

 

Valves—CLOSED

 

 

Discharge Air Temp

Outdoor air damper—CLOSED

Non-latching

Communicated or manual reset

Failure2,4

Face bypass damper—BYPASS

 

 

 

DX/electric heat—OFF

 

 

 

Baseboard heat—OFF

 

 

 

 

 

 

 

Fan—ENABLED

 

 

 

Valves—ENABLED

 

 

 

Outdoor air damper—MINIMUM

 

 

Outdoor Air Temp Failure4

POSITION5

Non-latching

Communicated or manual reset

 

Face bypass damper—ENABLED

 

 

 

DX/electric heat—ENABLED

 

 

 

Baseboard heat—ENABLED

 

 

 

 

 

 

UV-SVP01A-EN

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Contents Installation Owner Diagnostics Tracer ZN.520 for Classroom Unit VentilatorStart-up Procedures Installation of New UnitsPower Up Sequence General Information Tracer ZN.520 OverviewGeneral Information Controller Circuit Board Features Tracer ZN.520 unit controller circuit boardService Controller FeaturesTypical Components Peer-to-Peer Communications Communication ConfigurationsIntegrated Comfort System Communication Interface Stand-AloneInteroperability Standard End Devices End Device SpecificationsCharacteristic DescriptionStandard End Devices Way Control Valve Time clock Zone sensor Dpdt Control Transformer Installation and Wiring SpecificationsBinary Inputs Binary Outputs Generic/baseboard Heat Binary OutputAnalog Inputs Analog inputsMounting Vertical classroom unit ventilator end pocket Wiring PowerInstalling the Wall- Mounted Zone Sensor Optional Proper zone sensor placementHumidity and CO2 Sensors Typical Wiring Diagram-Wall Mounted Zone Sensor Typical Wiring Diagram-Unit Mounted Zone Sensor Typical Wiring Diagram-Unit Input/Output Summary Input and output summaryInput/Output Summary Cooling source ConfigurationConfigurable parameters Heating sourceBinary Outputs1 Analog Inputs1 Binary input summary ConfigurationBinary Inputs1 Analog input summaryFan configuration ranges Fan ConfigurationEnd Device Configurations DefaultSetpoints Setpoint defaults Default Valid rangeDischarge air limit ranges Default Valid range Discharge Air LimitsPower-Up Control Wait Occupied Bypass TimerMaintenance Timers Unit Identification Tag Location IdentifierWinking Heating And Cooling Changeover Logic Power-UpUnit Operation OccupancyHeat/Cool Changeover logic Heating Operation Fan Off DelayCooling Operation Fan OperationExhaust fan/damper operation Valve OperationFace-and-Bypass Damper Operation Modulating ValvesUnit Configuration Entering Water Temperature SamplingWater assumption chart Temperature Assumed1Electric Heat Operation Economizer OperationDX Operation Baseboard Heat OperationFan Status Filter Status/ Maintenance TimerOutput Overrides Other ModesData Sharing-LonWorks Simple data sharing applicationMore complex data sharing application Heating And Cooling Changeover Logic Heat/Cool Changeover logic Cooling Operation Valve Operation Entering Water Temperature Sampling Economizer Operation Output Overrides Data Sharing-LonWorks More complex data sharing application Black Service Push Button TroubleshootingRed Service LED Yellow Comm LEDTest Procedure Exit6Troubleshooting Discharge Air Temperature Limit Space Temperature FailureEntering Water Temperature Failure Outdoor Air Temperature FailureDiagnostics Troubleshooting Translating Multiple Diagnostics Rover service tool FansValves stay closed Probable cause Possible Explanation ValvesValves stay open Probable cause Possible Explanation Outside Air Damper DX/Electric HeatOutdoor air damper stays closed Probable cause Explanation Outdoor air damper stays open Probable Cause ExplanationTracer ZN.520 Unit Controller Replacement Replacing Circuit BoardsHardwired Thermistor Values Hardwired Setpoint AdjustmentFan Switch Resistance Values AppendixBinary configuration details Binary input or output Appendix-Binary ConfigurationBinary Configuration FunctionAppendix-Unit Operation Heat/cool mode input NviHeatCoolEffective heat/ cool mode output nvoHeatCool Unit Operation Based On The Effective HEAT/COOL OutputAppendix-Unit Operation Data Lists Configuration properties1Appendix-Data Lists Input/output listing1Set the Time and Day Setting the Time ClockAppendix-Timeclock Set the ProgramReview and Change Programs Override Program Manual OperationAppendix-Timeclock Appendix-Location Identifier Location Identifier Location Identifier Location Identifier Trane Company
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