Trane SCXG-SVX01B-EN manual Emergency Stop, Entering Cond WaterTemp Sensor Fail, Heat Failure

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Maintenance diagnostics

Reset Required: (PAR) An automatic reset occurs after communication has been restored.

Emergency Stop

Problem: The emergency top input is open.

Reason for Diagnostic: An open circuit has occurred on the emergency stop input caused either by a high duct temp t- stat trip, or the opening of field-provided contacts, switch, etc.

UCM Reaction: Off or close requests are issued as appropriate to the following functions;

a. Compressor staging/chilled water cooling control

b. Heat operation

c. Supply fan control and proof of operation

d. Exhaust fan control and proof of operation.

e. Exhaust actuator control f. Outside air damper control

g. OnVAV units, IGV/VFD control

Reset Required: (PMR) A manual reset is required after the emergency stop input recloses. The diagnostic can be reset by the HI.

Entering Cond WaterTemp Sensor Fail

Problem:

Activation Conditions: temperature < - 50°F or temperature > 209°F, and unit configured for water cooled condenser

c.Time to React: 10 sec <T < 20 sec

d.DiagnosticText (Human Interface Display) “ENT CONDWATERTEMP SENSOR FAIL”

e.Actions to be Initiated: A “Lockout All Ckts ” request is issued to the “Compressor Staging Function”

f.Reset: An automatic reset occurs after the entering condenser water temperature input returns to within range continuously for 15 seconds.

Entering Water Temp Sensor Fail

a. Data used (module, packet, byte, bit): WSM, 01,18,05

b. Activation Conditions: temperature < - 50°F or temperature > 209°F, and unit

configured with water cooled condenser and/or economizer c.Time to React: 10 sec <T < 20 sec

d.DiagnosticText (Human Interface Display) “ENTERINGWATERTEMP SENSOR FAIL”

e.Actions to be Initiated: A “Disable Water Side Economizer” request is issued to “Water Side Economizer Temperature Enable Function”

f.Reset: An automatic reset occurs after the Entering WaterTemp. input returns to within range continuously for 10 seconds.

EvapTemp Sensor Failure - Circuit 1, 2, 3, or 4

Problem: The evaporator temperature sensor (ckt #1, 2, 3, or 4) is out of range.

Check: Sensor resistance should be between 830 ohms (200°F) and 345.7Kohms (-40°F). If so, check field/unit wiring between sensor and MCM/SCM.

Reason for Diagnostic: The unit is reading a signal that is out of range for the circuit #1 evaporator temperature sensor input (temp < -55°F or temp > 209°F).

UCM Reaction: The coil frost protection function for the refrigeration circuit (#1, 2, 3, or 4) only is disabled.

Reset Required: (PAR) An automatic reset occurs after the #1, 2, 3, or 4 evap temp input returns to its allowable range for 10 seconds.

G

GBAS 0-5 VDC Module Comm Failure Problem: The RTM has lost communication with the GBAS module.

Check: Field/unit wiring between RTM and GBAS.

Reason for Diagnostic: The RTM has lost communication with the GBAS module.

UCM Reaction: The UCM will initiate the following actions;

a. If the demand limit input was closed prior to the communications loss, then the demand limit commands issued to the heat operation function (if applicable) and the compressor staging/

chilled water cooling function will be cancelled.

b. If any of the GBAS setpoint control parameters are the HI-selected setpoint sources, then those setpoints will revert to the default HI setpoints.

c. Any active GBAS output control parameters will be ignored.

d. A failsafe function in the GBAS module will cause all GBAS outputs to be zeroed and deenergized.

Reset Required: (PAR) An automatic reset occurs after communication has been restored.

H

Heat Failure

Problem: The heat has failed. (Electric heat unit)Typically, this is because the electric heat section became too hot.

Reason for Diagnostic: The heat fail input on the heat module was closed:

a. for more than 80 seconds,

b. for ten consecutive occurrances (each lasting five seconds or more) within a 210 second period.

UCM Reaction: An information only diagnostic is set.

Reset Required: (INFO) An automatic reset occurs after the heat fail input remains open for 210 seconds continuously.

Heat Module Auxilliary Temperature Sensor Fail

Problem: The heat mod aux temp sensor input is out of range.

Check: Sensor resistance should be between 830 ohms (200°F) and 345.7 ohms (-40°F). If so, check field/unit wiring between sensor and heat module.

Reason for Diagnostic: At least one enabled unit function has the heat module auxillary temperature input designated as its sensor, and the unit is reading a signal that is out of range for this input (temp < -55°F or temp > 209°F).

UCM Reaction: The functions that

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Contents Models JO and later design sequenceHazardousVoltage w/Capacitors IntroductionHazard Identification Special Note on Refrigeration EmissionsContents Refrigerant Handling Procedures Features and BenefitsModular Series Self-Contained Unit Components Unit Nameplate Installation informationModel Number Description Model Number Description ScwgDigit 24 Unit Connection Digit 31 Compressor ServiceValvesDigit 22 Unit Finish DigitModel Number Description Pswg Self-Contained Ship-WithAccessory Model Number DescriptionAfter-ShipmentAccessory Model Number Shipping Package Receiving and HandlingInstallation Preparation TopView CCRC/CIRC 20, 29 ServiceAccessTable I-PC-1. Service and code clearance requirements SectionLifting Equipment Capacity Rigging and Unit HandlingFigure I-PC-7.Assembled modular unit proper rigging Unit Handling ProcedureUnits with Thermostat Only Split-Apart Unit AssemblyIntelliPak UnitsUCM Only Remove panels FML, FMM, and FMRFigure I-PC-9 How to assemble the split apart modular unit External Unit Isolation Pre-Installation ChecklistSkid Removal Left-side view DimensionsWeights SCWG/SIWG Dimensions,Left-side View Right-side view Top view SCRG/SIRG Dimensions,SCRG/SIRGWeight, lbs Detail Dimensions, Dimensions WeightsCCRC/CIRC Refrigerant connections, CCRC/CIRC Air-cooled condenser dimensions & weight, in-lbsCCRC/CIRC -Air-Cooled Condenser CCRC/CIRC Electrical connections,Hot Water Coil Hot water coil dimensions & weight, in-lbsSteam Coil Steam coil dimensions, in-lbsFlexible Horizontal Discharge Plenum Electric heat coil dimensions & weight, in-lbsElectric Heat Coil Waterside Economizer Waterside economizer weight, in-lbsDetail a Detail B Airside economizer dimensions & weight, in-lbsAirside Economizer Result in death or serious injury Mounting Requirements Dimensions Weights VFDVariable Frequency Drive Option VFD Control and LineVoltageVariable Frequency Drive with Bypass Electrical Installation ProcedureVFD with bypass dimensions, Hazardous Voltage w/Capaci- tors Mechanical SpecificationsDuct Connections Water PipingTable I-MR-1. Water Connection Sizes Waterside Piping ArrangementsHazard of Explosion and Deadly Gases Brazing ProceduresRefrigerant Piping Air-Cooled Units Only Equipment Damage Unit Wiring DiagramsSupply PowerWiring Live Electrical ComponentsSelection Procedures Shipping bracket Installation requirementsPre-Startup Procedures Supply Fan IsolatorsFigure I-PR-3. Correct plenum insulation placement Unit Handling Airside Economizer InstallationUnit Installation Field Wiring ConnectionsTransducer Location Static PressureTransducer Installation VAV units onlyInstalling theTransducer Figure I-PR-7. Installing the waterside economizer Waterside Economizer Installation ProcedureTubing assemblies for waterside econo Mizer left-hand piping Waterside Economizer Ship-Separate Parts List Unit Structural Integrity Hydronic Coil InstallationInstallation Procedure Table I-PR-2.Available Electric Heat kW Electric Heat InstallationElectric Heat CoilWiring Procedure BAYSENS077* Description Standard with All IntelliPak UnitsZone Sensor Options for IntelliPak Control Units CV Unit Zone Sensor OptionsBAYSENS073 Description CV andVAV Unit Zone Sensor OptionsVAV Unit Zone Sensor Option BAYSENS074 DescriptionMounting the Subbase Zone Sensor InstallationWiring Mounting LocationRight Mounting Directly to the Wall Mounting to Junction Box Programmable Zone Sensors ConstantVolume Zone Sensor BAYSENS019 DescriptionVariable AirVolume Zone Sensor BAYSENS020B Description Airflows from adjacent zones or other units Programmable Zone Sensor InstallationTime Clock Option Time Clock InstallationTime Clock Installation Checklist Wiring theTimeclockLocation Recommendations Remote Human Interface Panel InstallationHuman Interface HI Panel Remote Human Interface PanelWall Mounting the RHI Panel ProcedureMounting the Remote Human Interface RHI Panel Pre-startup Interprocessor Communication Bridge ModuleWiring Wiring the Remote Human InterfaceLowVoltage AC FieldWiring Connections Communication Link ShieldedTwisted PairWiringPre-Startup Checklist Connecting toTracer SummitProgrammable Zone Sensor Options Installation programmingDuring Programming Indicates Heat supply air Cool supply air Warmup temperatureKeypad Operation Up and Down Button Arrows Temporary Manual OverrideTime Button Keypad LockoutFigure I-P-6.Temporary manual override menu screen Temporary Override Run ModeTable I-P-1. Zone sensor BAYSENS019 option menu settings Figure I-P-7.Temporary manual override run mode screenOff Flashing Remote Panel Indicator Signals From UCM to ZSMIntelligent Copy To use Intelligent CopyFigure I-P-9.BAYSENS019 complete icon display Icon DescriptionsFigure I-P-10.BAYSENS020 complete icon display To review and change programs Setting theTimeProgramming theTime Clock Option ProgrammingCompressor Damage Installation startupUnit Startup Procedures Pre-Startup ChecklistCompressor Amp Draw Startup LogEvaporator Air Cooled Units Water Cooled UnitsPoints List -TracerTMLCI-I Module Points List RTM ModulePoints List Gbas Module Points List Ecem ModuleRTM Module Board Standard on all Units Unit Control ComponentsTable O-GI-3. RTM setpoint analog inputs Table O-GI-2. RTM sensor resistance vs. temperatureVAV Box Option Ventilation Override Module VOM Option Human Interface Module Standard on all UnitsHeat Module Supply fan on Supply fan VFD on if equipped Purge sequence DGeneric BuildingAutomation System Module Option Table O-GI-7. Gbas input voltage corresponding setpoints Table O-GI-6. Gbas analog input setpointsWaterside Components Figure O-GI-3. Basic water piping, constant water flow UnitAirside Components General Operation information Air-Cooled Condensers Airside Economizer Interface with Comparative EnthalpyProperWaterTreatment Input Devices and System FunctionsFilter Switch Return AirTemperature SensorSupply Air Temperature Sensor Supply Airflow Proving SwitchesTracer Summit System Operation operationControl Sequences Operation Unoccupied Sequence of OperationTimed Override Activation ICS Morning WarmupCycling Capacity Morning Warmup MWU Occupied Sequence Electric Heat Supply Air Setpoint Reset VAV Units OnlyMechanical Cooling Water-Cooled Units OnlyTable O-SO-1. Compressor Stages CompressorsCompressor Lead/Lag Operation Table O-SO-2. Pressure cutouts Step ControlEvaporator Coil Frost Protection Operation Service Valve OptionTable M-GI-1. SCWG/SIWG/SCRG/SIRG General Maintenance Data Maintenance informationAir Filters Maintenance proceduresMaintenance Procedures Remove all standing water Inspecting and Cleaning the Drain PanInspecting and Cleaning the Fan Fan Drive Supply FanVariable Frequency Drive VFD Table M-MP-3. Compatible Fan Bearing Grease Fan BearingsTable M-MP-1. Baldor Fan Bearing Lubrication Schedule Table M-MP-2.AO Smith Bearing Lubrication ScheduleTable M-MP-4. Fan shaft bearing torques Fan BeltTensionDeflection = belt span/64 Belt Adjusting BeltTensionRefrigerant Evacuation Refrigerant SystemConfined Space Hazards R407c Refrigerant LeakTestingMotor Winding Damage Use of Pressure Regulator Valves GaugesMaintenance Inlet GuideVanes Coil Fin CleaningProper Coil CleaningAgent Coil Freezeup Piping Components Chemical Cleaning of Condenser and Economizer CoilFlow Switch Maintenance Cleaning the Flow SwitchAnnual Maintenance Maintenance Periodic ChecklistsMonthly Checklist Semi-Annual MaintenanceSystem Checks Check the zone thermostat settingsOperating Procedures Common Unit Problems and SolutionsDiagnostics Maintenance diagnosticsEntering Water Temp Sensor Fail Heat Module Auxilliary Temperature Sensor FailEmergency Stop Entering Cond WaterTemp Sensor FailMCM Communications Failure Mode Input FailureLow Air Temp Limit Trip Low Pressure Control Open Circuit 1, 2, 3, orTemp. Sensor Failure NSB Panel ZoneTemperature Sensor FailureCheck Field/unit wiring between RTM and NSB Panel Humidity Sensor FailureRTM Zone Sensor Failure RTM Data Storage ErrorLCI-I Module Comm Failure Supply Fan VFD Bypass EnabledProblemThe LCI-I has lost communication withTracer Summit Supply Fan FailureWSM Communications Fail Render all HI keystrokes ineffectiveVOM Communications Failure Water Flow Fail WSM Mixed AirTemp Sensor Fail114 115 Literature Order Number

SCXG-SVX01B-EN specifications

The Trane SCXG-SVX01B-EN is an advanced variable refrigerant flow (VRF) system designed to provide efficient and flexible heating and cooling solutions for commercial and residential applications. This system exemplifies Trane's commitment to innovation, energy efficiency, and ease of installation, making it a standout choice in the industry.

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